6702-AEAB-0000 [ETC]
Pressure & Vacuum Switches; 压力和真空开关
| 型号： | 6702-AEAB-0000 |
| 厂家： | 
ETC |
| 描述： | Pressure & Vacuum Switches |
| 文件： | 总20页 (文件大小：848K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Pressure & Vacuum Switches
S W I T C H I N G A N D S E N S I N G S O L U T I O N S
Herga Electric Limited is an independent UK manufacturer of
switching systems. In addition to pressure and vacuum switches, we offer
other innovative switching solutions:-
hergair
herga
Airswitching systems
Footswitches
hergalite
herga
Fibre Optics / Infra red safety products
Hand controls
Our expertise spans the automotive, medical, packaging,
domestic appliance and spa industries.
Herga is driven to respond rapidly to delight our customers. Herga seeks
to develop its relations with customers to achieve their business goals.
Global Presence
Our distributor network covering the worlds major markets enables
technical help and assistance to be just a phone call away.
Continuous Improvement
Herga’s approval to ISO 9002 ensures that we are fully in control of our quality.
However, this is just the starting point for an aspiring World Class company.
We encourage training and development and continuous improvements
at individual, team and company level.
How can we help you?
This brochure provides a brief overview of our product range. If you
require further information, please contact us at our e-mail address:
herga.electric@dial.pipex.com
Herga’s customers worldwide include
BMW/Rover
Electrolux
Jacuzzi
RS Components
Siemens
General Electric
1999
FOR FURTHER INFORMATION TEL: +44 (0)1284 701422 FAX: +44 (0)1284 753112
ISSUE 01
As a consequence of our policy of continual improvement, we reserve the right to change without notice any detail in this publication. Please see our Conditions of Sale.
Pressure & Vacuum Switches
6702 High Pressure Switch
High pressure switch all plastic construction. Ranges 1.4-13.8 Bar (20-200 PSI).
Two (2) Pole Electrical Switching.
Page PV1 & 2
Page PV3
6773 Double Diaphragm Pressure Switch
Double diaphragm construction to meet double insulation requirements of
EN 60335-2-60. Water presence detection.
6761 and 6763 Low Air Pressure Vacuum Switches
Printed circuit board mounted, pressure/vacuum switches. UL versions available.
Page PV4
Range from (0.015 Bar - 1.0 Bar Pressure) (-0.015 Bar - 0.670 Bar Vacuum).
6741 and 6742 Medium Pressure Switches
Constructed in Nylon 12 material (pressure range 0.1 Bar to 8.2 Bar).
Single or double pole in 8 adjustable switch ranges. UL versions available.
Page PV5 & 6
Page PV7 & 8
Page PV9 & 10
Page PV11 & 12
Page PV13
6731 and 6732 Low Pressure Switches
Constructed in Nylon 12 material (pressure range (0.0037 Bar to 0.137 Bar).
Single or double pole in 3 adjustable switch ranges. UL versions available.
6753 Low Air Pressure/Vacuum Switches
Small versatile compact differential switch with low contact inertia for rapid switching
(range 2.5 mbar to 40 mbar).
6721 and 6722 Vacuum Switches
Constructed in Nylon 12 material (vacuum range -0.0075 Bar to -0.670 Bar).
Single or double pole in 5 adjustable switch ranges. UL versions available.
Pressure Conversion Chart
For more commonly used measurements, including flow, liquid, force and weight
equivalents.
Certification Markings
Covers most worldwide authorities/certification marks.
Page PV14
Accessories / Switch Housings
Air and electrical connections are available for all pressure and vacuum switches. Please
also refer to Airswitching section or contact herga for details.
Page PV15
Page PV16
Fax Back Sheet
For your fast quotation service.
1999
FOR FURTHER INFORMATION TEL: +44 (0)1284 701422 FAX: +44 (0)1284 753112
ISSUE 01
As a consequence of our policy of continual improvement, we reserve the right to change without notice any detail in this publication. Please see our Conditions of Sale.
6702 ~ High Pressure Switch
Benefits
❖ High pressure switch, all plastic construction (glass
❖ Excellent repeatability
loaded nylon)
❖ Switches have adjustable pressure and differential
❖ Specific settings can be set for volume orders
❖ IP65 enclosures class II double insulated
❖ Alternate diaphragm and connectors available for
volume orders
6702
0
0
0
0
1. Model Number
2. Operating Pressure
A
B
C
20 - 50 PSI (1.40 - 3.45 Bar) Red Spring
40 - 100 PSI (2.76 - 6.89 Bar) White Spring
80 - 200 PSI (5.52 -13.79 Bar) Blue Spring
3. Additional Operating (Springs)
A
B
C
D
E
F
20 - 50 PSI (1.40 - 3.45 Bar)
40 - 100 PSI (2.76 - 6.89 Bar)
80 - 200 PSI (5.52 - 13.79 Bar)
20 - 50 PSI (1.40 - 3.45 Bar) & 40 - 100 PSI (2.76 - 6.89 Bar)
40 - 100 PSI (2.76 - 6.89 Bar) & 80 - 200 PSI (5.52 - 13.79 Bar)
80 - 200 PSI (5.52 - 13.79 Bar) & 20 - 50 PSI (1.40 - 3.45 Bar)
20 - 50 PSI (1.40 - 3.45 Bar) & 40 - 100 PSI (2.76 - 6.89 Bar)
& 80 - 200 PSI (5.52 - 13.79 Bar)
G
Z
No additional springs supplied
4. Electrical Microswitching Rating
A
B
C
21A 250V ac Silver Change Over Contacts
0.1A 250V ac Gold Change Over Contacts
0.1A 24V ac/dc Gold Change Over Contacts
5. Packaging and Label Option
A
B
Herga individually packed in plain carton
Herga vacuum form tray (for quantities 10+)
1999
FOR FURTHER INFORMATION TEL: +44 (0)1284 701422 FAX: +44 (0)1284 753112
ISSUE 01
As a consequence of our policy of continual improvement, we reserve the right to change without notice any detail in this publication. Please see our Conditions of Sale.
6702 ~ High Pressure Switch
6702 Pressure Switch
The industrial pressure switch is moulded entirely in plastic with the
exception of the pressure connection and is water, oil and dust proof to
IP65. The switches have excellent repeat accuracy, even over widely
varying ambient conditions.
The operating pressure is adjustable externally using the thumb screw on
the top and the approximate pressure setting can be seen through a window
in the cover. To discourage unauthorised tampering, the adjusting screw can
be locked in position with an M1.5mm Allen screw.
The microswitches have independent vernier adjustment and are normally
set to operate within 2 PSI on rising pressure. Where two pressure levels
are to be controlled, the switches can be adjusted separately so that one
switch will operate at up to 80% of the level of the second. The switches can
also be set to operate simultaneously on falling pressure instead of rising
pressure.
The pressure switch is of Class II construction with double insulation.
For quantity orders, many special options are available, please enquire:-
❖
❖
❖
❖
Single or double pole switching set to specific pressure levels
Alternative connector sizes
Alternative diaphragms and metal chambers to resist particular fluids
Installation and setting instructions are supplied with each product
Note: differentials are approximate
Suitability for use with different operating media
Pressure Medium
6702
Other Information
Withstand pressure
Setting accuracy when set by herga
Temperature range
Diaphragm
Acetone
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
500 PSI (34.5 Bar)
± 10%
Ammonia (Liquid)
Amyl Alcohol to 20˚C
Automotive Brake Fluid
Beer
Butane
Carbon Dioxide (Dry)
Citric Acid
Copper Sulphate (Sol.)
Compressed Air
Cutting Oil
Diesel Oil
Detergent Solution
Fuel Oil
Glycol
Hydraulic Oil
Hydrogen
Lubricating Oil
Milk
Mineral Oil
Natural Gas
Oxygen to 70˚C
Petrol
Plating Solution (Chrome)
Salt Water
-5˚C to +70˚C
Fabric reinforced Nitrile
300g
Weight
Silver Contact Microswitch Data
6
Mechanical
Electrical
1.0 x 10
Average Life
Expectancy
5
4
2.0 x 10 @ 10A 1.0 x 10 @ 21A
Max. Electrical Load
Electrical Rating
Voltage
250V
Res.
21A
Ind.
(Pf 0.75 Motor)
1HP
2HP
AC
250V
21A
21A
21A
15A
8A
8A
125V
6V
12V
21A
15A
7A
24V
DC
60V
1A
0.5A
0.2A
0.1A
110V
220V
0.5A
0.25A
Sewage
Turpentine
Vinegar
Water
Gold Contact Microswitch Data
6
Mechanical
Electrical
1.0 x 1.0
Average Life
Expectancy
5
4
2.0 x 10 @ 10A 1.0 x 10 @ 21A
Max. Electrical Load
Electrical Rating
✓
✓ = Recommended
= Suitable with modifications
Voltage
250V
Res.
0.1A
0.1A
Ind.
(Pf 0.75 Motor)
0.05
N/A
-----
AC
Note: Dry Switching - if switching low power circuits, low current (4 to
100 milliamperes) and low voltage (below 30V), consult herga or refer
to gold contact in section 4 of the opposite page.
-----
UL/CSA Only
125V
Switch Standards:
EN 60730, EN 61058 and UL 508
Herga do not accept liability for any pressure operated device used
outside the pressure range specified by the company.
Approvals Available:
CE, BEAB, CSA, DEMCO, IMQ, KEMA, NEMCO,
OVE, SEMCO, SET I, SEV, UL, VDE
1999
FOR FURTHER INFORMATION TEL: +44 (0)1284 701422 FAX: +44 (0)1284 753112
ISSUE 01
As a consequence of our policy of continual improvement, we reserve the right to change without notice any detail in this publication. Please see our Conditions of Sale.
6773 ~ Double Diaphragm Pressure Switch
Benefits
❖ Specified to EN 60335-2-60 double insulated for water
❖ Gold contacts available
❖ Other pressures available up to 10 PSI
detection
❖
Various microswitch options
❖
Multiple cap and spout options available
6773
A
A
1. Model Number
2. Pressure Range
A
250mm H2O to 760mm H2O Standard
3. Caps
A
B
C
D
E
F
G
H
J
Side Entry Std Spout Std Orientation 4.0mm Spout
Side Entry Std Spout Rotated 90 Viewed From Cap 4.0mmØ Spout
˚
Side Entry Std Spout Rotated 180 Viewed From Cap 4.0mmØ Spout
˚
Side Entry Std Spout Rotated 270 Viewed From Cap 4.0mmØ Spout
˚
Side Entry Long Spout 4.0mmØ Std Orientation
Side Entry Long Spout Rotated 90 Viewed From Cap 4.0mmØ Spout
˚
Side Entry Long Spout Rotated 180 Viewed From Cap 4.0mmØ Spout
˚
Back Entry Short Thread 4.0mmØ Spout. Not suitable for ‘O’ ring
Back Entry Long Thread 4.0mmØ Spout
K
L
Back Entry Long Thread 2.0mmØ Spout
Long Thread Spout Rotated @ 90 4.0mmØ Spout
˚
4. Bleed
A
J
No Bleed Cap
With Bleed Cap
5. Nut Specification
A
B
Black Moulded Nut
Black Moulded Nut and ‘O’ Ring (only available with options 3J,
K & L above)
6. Authority
A
European Tag Configuration
7. Terminal Combinations
A
B
C
3 Blade QC 6.3mm x 0.8mm
2 Blade QC 6.3mm x 0.8mm Normally Open Contacts
2 Blade QC 6.3mm x 0.9mm 90˚ Crank Normally Open Contacts
8. Microswitch Rating
A
B
C
0.1A 125/250V ac Gold Contacts (not available with option 7c)
10A 1/4 HP 125/250V ac
21A 250V ac 1 HP 125V ac 2 HP 250V ac
1999
FOR FURTHER INFORMATION TEL: +44 (0)1284 701422 FAX: +44 (0)1284 753112
ISSUE 01
As a consequence of our policy of continual improvement, we reserve the right to change without notice any detail in this publication. Please see our Conditions of Sale.
6761 & 6763 ~ Low Air Pressure Vacuum
Switches (slow make contacts)
Benefits
❖ Available with base or side tube entry
❖ Silver or gold contact options
❖ A range of small switches designed for direct
mounting onto printed circuit boards
❖ UL versions available
❖ Switches can be factory set within specified tolerances
❖ Various spout orientations available
❖ Double diaphragm versions available upon request
❖ 'O' ring seals available for dust and water tight
applications, back entry versions only
Printed Circuit Board Mounting Switches
Model No
6761 (Vacuum)
6763 (Pressure)
Pressure/Vacuum range
Minimum
Maximum
150mm (6 ins) Wg
150mm (6 ins) Wg
670 millibar (9.8) PSI
Approximately 0.06 ins WG
Adjustable variants
1.0 Bar (14.7) PSI
Maximum Differential
Pressure/Vacuum Range
Body Withstand Pressure
Air Bleed Version
Approximately 0.06 ins WG
Adjustable variants
2.7 Bar (40) PSI
2.7 Bar (40) PSI
Available upon request
8 - 30cc/Min @ 31 ins WG
Available upon request
8 - 30cc/Min @ 31 ins WG
Flow Rate Litre / Min (with air bleed)
Pressure Connection
4mm Ø spout for side and back entry
2mm Ø spout for back entry only
Lower spout ‘V’ vacuum
4mm Ø spout for side and back entry
2mm Ø spout for back entry only
Upper spout ‘P’ pressure
Connecting Tube Reference
4mm spout = 2311-01 or 2311-08
2mm spout = 2311-03
4mm spout = 2311-01 or 2311-08
2mm spout = 2311-03
Temperature Range
Electrical Data
Switch
-10˚C to 85˚C (Flow Solder 220˚C for 5 Sec)
-10˚C to 85˚C (Flow Solder 220˚C for 5 Sec)
Single Pole Normally Open
0.5A RES 250V ac (Silver contacts)
50mA RES 250V ac
Single Pole Normally Open
0.5A RES 250V ac (Silver Contacts)
50mA RES 250V ac
Contact Rating Maximum
UL
(Maximum ratings may not be achieved at low pressure settings)
Dry Switching Maximum Recommended Current 10mA 24V dc (UL)
10mA 24V dc (UL)
Body
Glass filled polyester
Glass filled polyester
Diaphragm
Contacts
Silicone as standard
Silicone as standard
Silver or gold plated copper pins
Silver or gold plated copper pins
6
6
Mechanical Life
Weight (grams)
1 x 10 cycles
1 x 10 cycles
8grms
8grms
6761/6763 Vacuum and Pressure Switch Range
Non Std
A miniature, compact low pressure switch designed for direct fitting
by solder pins to printed circuit boards. Both vacuum and pressure
ports are provided making the unit ideal for differential switching.
Typical applications are indicators, emergency cut-out and alarms,
filter and low pressure/vacuum monitoring. The switch is made to
order for specific applications, the actual operating pressures or
vacuum being set during production. However, final adjustment may
be made after installation by the slotted screw in the base. The body
construction allows the two ports to be set at any angle to each other.
shown as 270˚
1999
FOR FURTHER INFORMATION TEL: +44 (0)1284 701422 FAX: +44 (0)1284 753112
ISSUE 01
As a consequence of our policy of continual improvement, we reserve the right to change without notice any detail in this publication. Please see our Conditions of Sale.
6741 / 6742 ~ Medium Pressure Switches
Benefits
❖ Switches set to specific rising or falling pressures
❖ UL recognised versions available
❖ Single or double pole switching
❖ Customised settings available upon request
❖ Various connector options available
❖ High performance repeatability
Silver Contact Microswitch Data
Mechanical
Electrical
1.0 x 106
Model No
6742-20/30/40/50/60
6742-70/80/90
2 Pole Change over
21 (8) A 250V ac
Average Life
Expectancy
2.0 x 105 @ 10A 1.0 x 104 @ 21A
Electrical Switch Data 2 Pole change over
Electrical Rating
Max. Electrical Load
Contact Rating
21 (8) A 250V ac
Pressure Connection Brass 1 8" BSPT
Brass 1 8" BSPT
/
/
Voltage
250V
250V
125V
6V
Res.
21A
Ind.
8A
(Pf 0.75 Motor)
Setting Accuracy
Withstand Pressure
Temperature Range
Body Material
± 10% as standard
25 PSI or x 2
-5˚C to + 70˚C
Nylon 12
± 10% as standard
150 PSI 10 Bar
-5˚C to + 70˚C
Nylon 12
1HP
1HP
AC
21A
21A
21A
15A
8A
21A
15A
7A
12V
Nitrile fabric
Diaphragm
Neoprene
reinforced fitted in
brass pressure
capsule
24V
DC
60V
1A
0.5A
0.1A
0.1A
110V
220V
0.5A
0.25A
Spring
Weight
Spring steel
50gm
Spring steel
85gm
Gold Contact Microswitch Data
Mechanical
1.0 x 106
Pressure Range
Average Life
Expectancy
Differential
(Fixed)
Model No
Electrical
2.0 x 106 @ 10A 1.0 x 104 @ 21A
P.S.I
Bar
0.10 - 0.24
Electrical Rating
Voltage
Max. Electrical Load
6742-20
6742-30
6742-40
6742-50
6742-60
6742-70
6742-80
6742-90
1.5 - 3.5
3.0 - 5.5
5 - 10
See chart 1
See chart 1
See chart 1
See chart 2
See chart 2
See chart 3
See chart 3
See chart 3
Res.
0.1A
0.1A
Ind.
(Pf 0.75 Motor)
0.20 - 0.37
0.34 - 0.68
0.54 - 1.22
1.08 - 2.04
1.70 - 3.79
3.1 - 5.17
0.05
N/A
-----
AC
250V
125V
-----
UL/CSA Only
8 - 18
16 - 30
25 - 55
45 - 75
60 - 120
Switch Standards:
EN 60730, EN 61058 and UL 508
Approvals Available:
CE, BEAB, CSA, DEMCO, IMQ, KEMA, NEMCO,
OVE, SEMCO, SET I, SEV, UL, VDE
4.14 - 8.27
Special options are available for quantity orders
NB
❖
❖
❖
❖
Diaphragms in silicon rubber, nitrile, EPDM
Switches with wide or close differentials
Springs in stainless steel
Herga do not accept liability for any pressure operated device used
outside the pressure range specified by the company.
NPT connectors available
1999
FOR FURTHER INFORMATION TEL: +44 (0)1284 701422 FAX: +44 (0)1284 753112
ISSUE 01
As a consequence of our policy of continual improvement, we reserve the right to change without notice any detail in this publication. Please see our Conditions of Sale.
6741 / 6742 ~ Medium Pressure Switches
Suitability for use with different operating media
Chart 1
Bar
0.7
PSI
10
Pressure Medium
Diaphragms
6742/20/30/40 6742/70/80
Chemical Compatibility
0.6
0.5
0.4
0.3
0.2
50 & 60
& 90
✓
8
6
4
2
0
✓
✓
✓
✓
✓
Acetone
✓
Ammonia (Liquid)
Amyl Alcohol to 20˚C
Automotive Brake Fluid
Beer
✓
6472-40
✓
✓
✓
Benzyl Alcohol
Butane
Carbon Dioxide - Dry
Citric Acid
Copper Sulphate (Sol.)
Compressed Air
Cutting Oil
Diesel Oil
Detergent Solution
Fuel Oil
Glycol
Hydraulic Oil
Hydrogen
Lubricating Oil
Milk
Mineral Oil
Natural Gas
Nitric Acid (Dil.)
Oxygen to 70˚C
Petrol
Plating Solution (Chrome)
Salt Water
Sewage
Sulphur Dioxide
Turpentine
Vinegar
Water
6472-30
✓
✓
✓
✓
✓
✓
✓
✓
6472-20
0.1
0
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
2
4
6
8
10 PSI
0.7 Bar
0
0.1
0.2
0.3
0.4
0.5
0.6
✓
✓
Chart 2
✓
✓
Bar
2.0
PSI
✓
✓
30
25
20
15
10
5
✓
✓
✓
✓
✓
✓
1.5
1.0
0.5
6472-60
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
6472-50
✓
✓
FALLING PRESSURE
15 20
Key:
✓ = Recommended
5
10
25
30 PSI
✓
= Suitable with modification
= Not suitable
0.5
1.0
1.5
2.0
Bar
Chart 3
Bar
8
PSI
120
110
100
90
7
6
5
4
3
6472-90
80
70
60
6472-80
Alternative Pressure Connections
1
50
/ ” NPT Pressure Connector
8
40
6472-70
FALLING PRESSURE
60 70 80 90
30
20
20 30 40
50
100 110 120
PSI
Bar
2
3
4
5
6
7
8
Note: Differentials are approximate
1999
FOR FURTHER INFORMATION TEL: +44 (0)1284 701422 FAX: +44 (0)1284 753112
ISSUE 01
As a consequence of our policy of continual improvement, we reserve the right to change without notice any detail in this publication. Please see our Conditions of Sale.
6731 / 6732 ~ Low Pressure Switches
Benefits
❖ These switches have been designed primarily for the
OEM manufacturer who requires low cost and high
reliability
❖ The switches have excellent repeat accuracy
❖ Double pole switching available upon request
❖ Wide choice of microswitch options including tab
❖ UL recognised versions available
configurations
Model No
6731-03
6731-06
6731-10
Pressure Range
Differential
(Fixed)
Model No
Single Pole
change over
Single Pole
change over
Single Pole
change over
Inches Water
1.5 - 7
mm Water
40 - 180
Electrical Switch
6731-03
6731-06
6731-10
See chart 1
See chart 1
See chart 1
Contact Rating
3(1)A 250V ac
10(3)A 250V ac 21(8)A 250V ac
5 - 25
127 - 635
510 - 1400
Pressure
Connection
Side entry spout Side entry spout Side entry spout
4mm O/D
4mm O/D
4mm O/D
20 - 55
Setting Accuracy ± 10% as std
± 10% as std
± 10% as std
Special options are available for quantity orders
Withstand
25 PSI
25 PSI
25 PSI
Pressure
❖
❖
❖
❖
Switches set to specific operating pressure, rising or falling
Body Material
Diaphragm
Spring
Nylon 12
Neoprene
Spring steel
50gm
Nylon 12
Neoprene
Spring steel
50gm
Nylon 12
Neoprene
Spring steel
50gm
Diaphragms in silicon rubber, nitrile, EPDM
Switches with wide or close differentials
Springs in stainless steel
Weight
Pressure Switches
6731-03
2 x 106
6731-06
2 x 106
6731-10
1.0 x 106
Mechanical
Electrical
Average Life
Expectancy
0.2 x 106 @ 1A
0.2 x 106 @ 6A 50K @ 10A
0.2 x 106 @ 10A 10K @ 21A
Electrical Rating
Max Electrical Load
Max Electrical Load
Max Electrical Load
Motor (Pf0.75)
Motor (Pf0.75)
Voltage
125V
250V
6V
Resistive
3A
Inductive
1A
Resistive
10A
Inductive
10A
Resistive
21A
Inductive
15A
0.5HP
0.5HP
1HP
2HP
AC
DC
1A
1A
10A
15A
3A
3A
10A
21A
10A
10A
21A
21A
12V
3A
1A
5A
3A
15A
15A
1A
0.5A
0.5A
0.2A
0.1A
5A
3A
8A
7A
24V
1A
1A
0.5A
0.2A
0.1A
1A
0.5A
0.2A
0.1A
60V
110V
220V
0.5A
0.25
0.5A
0.25A
0.5A
0.25A
Switch Standards:
Approvals Available
EN 60730, EN 61058 and UL 508
CE, BEAB, CSA, DEMCO, IMQ, KEMA, NEMCO, OVE, SEMCO, SET I, SEV, UL, VDE. Approved to BS 3955 part III
Note: Dry Switching
If switching low power circuits, low current (4 to 100 milliamperes) and low voltage (below 30V), consult herga for special switches.
NB - Herga do not accept liability for any pressure operated device used outside the pressure range specified by the company.
1999
FOR FURTHER INFORMATION TEL: +44 (0)1284 701422 FAX: +44 (0)1284 753112
ISSUE 01
As a consequence of our policy of continual improvement, we reserve the right to change without notice any detail in this publication. Please see our Conditions of Sale.
6731 / 6732 ~ Low Pressure Switches
Suitability for use with different operating media
Pressure Medium
Diaphragms
6731
Chemical Compatibility
✓
✓
✓
✓
✓
Acetone
Ammonia (Liquid)
Amyl Alcohol to 20˚C
Automotive Brake Fluid
Beer
Benzyl Alcohol
Butane
Carbon Dioxide - Dry
Citric Acid
Copper Sulphate (Sol.)
Compressed Air
Cutting Oil
Diesel Oil
Detergent Solution
Fuel Oil
Glycol
Hydraulic Oil
Hydrogen
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
Lubricating Oil
Milk
✓
✓
Mineral Oil
✓
✓
Natural Gas
Nitric Acid (Dil.)
Oxygen to 70˚C
Petrol
Plating Solution (Chrome)
Salt Water
✓
✓
✓
✓
Sewage
✓
Sulphur Dioxide
Turpentine
Vinegar
✓
✓
Water
✓
Key:
✓ = Recommended
✓
= Suitable with modification
= Not suitable
Chart 1
mm Wg
in WG
60
50
40
1400
1200
1000
800
30
6731-10
600
20
6731-06
400
200
0
10
6731-03
FALLING PRESSURE
0
in WG
0
0
10
20
30
40
50
60
200
400
600
800
1000
1200
1400
mm Wg
Note: Differentials are approximate
FOR FURTHER INFORMATION TEL: +44 (0)1284 701422 FAX: +44 (0)1284 753112
1999
ISSUE 01
As a consequence of our policy of continual improvement, we reserve the right to change without notice any detail in this publication. Please see our Conditions of Sale.
6753 ~ Low Air Pressure / Vacuum Switches
Benefits
❖ Sensitive versatile switch - ideal for long tube length
❖ Bleed versions available for temperature compensation
❖ Easily adjustable settings
applications
❖ Normally open or normally closed contact configuration
❖ Ideal for switching low power circuits
❖ Custom pressure, vacuum and bleed settings available
upon request
6753
0
0
0
1. Model Number
2. Operation
A
B
Normally Open - Pressure
Normally Closed - Vacuum
3. Bleed Adjuster Options
A
B
C
D
Bleed A side only, Vacuum N/O to N/C, Pressure N/C to N/O
Bleed B side only, Vacuum N/O to N/C, Pressure N/C to N/O
Bleed both sides Vacuum / Pressure
No bleed variant either side Vacuum / Pressure
4. Bleed Setting
A
J
100 - 300 cc/Min Factory Setting
No bleed setting
5. Pressure Setting
A
C
E
G
J
2.25" WG ± 0.5" Std
B
D
F
2" WG ± 0.5"
4" WG ± 0.5"
8" WG ± 10%
3" WG ± 0.5"
6" WG ± 10%
10" WG ± 10%
14" WG ± 10%
H 12" WG ± 10%
16" WG ± 0 - 10%
K
6. Packaging Options
A
B
Vacuum Form Tray (100 off volumes - ideal for OEM applications)
Poly Bag (individual)
1999
FOR FURTHER INFORMATION TEL: +44 (0)1284 701422 FAX: +44 (0)1284 753112
ISSUE 01
As a consequence of our policy of continual improvement, we reserve the right to change without notice any detail in this publication. Please see our Conditions of Sale.
6753 ~ Low Air Pressure / Vacuum Switches
Technical Data
Electrical Data
Pressure/Vacuum range minimum 25mm (1 in) Wg
maximum 400mm (16 ins) Wg
Switch
Single pole, N/Open / N/Closed
0.5A RES 250V ac
(Maximum ratings may not be
achieved at low pressure
settings)
Contact Rating Maximum
Maximum Differential
400mm (16 ins) Wg
50mm (2.25 ins) Wg
(Contacts Normally Open) Other
settings available see note 2)
Pressure
Dry Switching Minimum Current
5mA 4V dc
Standard Factory Setting
Body
Glass filled nylon 12
Neoprene
Diaphragm
Maximum Differential Between
Pressure Connection
0.34 Bar (5 PSI)
Gold plated silver mounted on
phosphor-bronze blades
Contacts
Body Withstand Pressure
Air Bleed Version
1.0 Bar (14.7 PSI)
Contact Resistance
Mechanical Life
Weight (grams)
0.05 Ohms
1 x 106 cycles
10grms
See choice options 3 & 4, other
settings available, see note 3)
Standard 100 - 300 cc/Min
@ 5 PSI
Flow Rate Litre / Min
Connection Position
Base see note 2)
4mm dia spouts
Pressure Connection
For reducing connectors, please
refer to accessories page
Connecting Tube Reference
Temperature Range
2311-08 or 2311-01
-5˚C to 50˚C
6753 Pressure Switch Range
For very sensitive pressure, vacuum and differential pressure switching.
The 6753 range of switches provide a high specification in a small, versatile body shell. Great care has been taken in the switch unit design, keeping
the moving mass and therefore inertia to a minimum. This means that it can operate at a high cycle rate with low pressure, vacuum or pressure
differential. This design feature can be used when measuring pressure pulses such as on component counting applications and used with herga Safe
Edges. The switch will operate very rapidly keeping the switch delay to a minimum.
1) For good repeatable switching, the contacts are gold plated on solid silver. The electrical rating of the switch is dependent on the contact pressure.
This pressure is dependent on the air pressure. Thus, for very sensitive setting the permissible switching current will be lower than normal.
2) The standard switch can be adjusted to give normally closed or normally open contacts depending on the application. For operation on pressure
with normally closed contacts, connect to air connection ‘A’ and screw in sensitivity adjusting screw ‘S’ until contacts are normally closed. For
operation on pressure with normally open contacts, connect to air connection ‘B’ and set with contacts normally open.
3) A separate version, (see bleed options), is provided with adjustable air bleeds on both sides of the diaphragm. These air bleeds are adjusted to
a level which is suitable for most applications involving safe edges or elbows, and prevent pressure or vacuum building up inside when the
ambient temperature or atmospheric pressure changes.
1999
FOR FURTHER INFORMATION TEL: +44 (0)1284 701422 FAX: +44 (0)1284 753112
ISSUE 01
As a consequence of our policy of continual improvement, we reserve the right to change without notice any detail in this publication. Please see our Conditions of Sale.
6721 / 6722 ~ Vacuum Switches
Benefits
❖ These switches have been designed primarily for the
OEM manufacturer who requires low cost and high
reliability
❖ The switches have excellent repeat accuracy
❖ Double pole switching available upon request
❖ Wide choice of microswitch options available including
tab configurations
❖ UL recognised versions available
Model No
6721-03
6721-06
6721-20/30/40
Vacuum Range
Differential
(Fixed)
Model No
Single Pole
change over
Single Pole
change over
Single Pole
change over
Electrical Switch
Data
Inches Water
3 - 8
mm Water
75 - 200
6721-03
6721-06
6721-20
6721-30
6721-40
See chart 1
See chart 1
See chart 1
See chart 2
See chart 2
Contact Rating
3(1)A 250V ac
10(3)A 250V ac 21(8)A 250V ac
7 - 15
180 - 380
330 - 810
710 - 2030
1900 - 6860
Vacuum
Connection
Side entry spout Side entry spout Side entry spout
4mm O/D
4mm O/D
4mm O/D
13 - 32
Setting Accuracy ± 10% std
± 10% std
± 10% std
28 - 80
Temperature
Range
-5˚C to + 70˚C
-5˚C to + 70˚C
-5˚C to + 70˚C
75 - 270
Body Material
Nylon 12
Nylon 12
Nylon 12
Special options are available for quantity orders
❖
❖
❖
❖
Switches set to specific operating vacuum, rising or falling
Diaphragm
Neoprene
Neoprene
Spring steel
Neoprene
Spring steel
Diaphragms in silicon rubber, nitrile, EPDM
Switches with wide or close differentials
Springs in stainless steel
1)
1)
1)
Spring (in
Vacuum Cavity)
Spring steel
Note: The spring is fitted in the vacuum cavity in contact with the media
Pressure Switches
6731-03
2 x 106
6731-06
2 x 106
6731-10
1.0 x 106
Mechanical
Electrical
Average Life
Expectancy
0.2 x 106 @ 1A
Max Electrical Load
0.2 x 106 @ 6A 50K @ 10A
Max Electrical Load
0.2 x 106 @ 10A 10K @ 21A
Max Electrical Load
Electrical Rating
Motor (Pf0.75)
Motor (Pf0.75)
Voltage
125V
250V
6V
Resistive
3A
Inductive
1A
Resistive
10A
Inductive
10A
Resistive
21A
Inductive
15A
0.5HP
0.5HP
1HP
2HP
AC
DC
3A
3A
1A
1A
10A
10A
21A
15A
10A
10A
21A
21A
12V
3A
1A
5A
3A
15A
15A
1A
0.5A
0.5A
0.2A
0.1A
5A
3A
8A
7A
24V
1A
1A
0.5A
0.2A
0.1A
1A
0.5A
0.2A
0.1A
60V
110V
220V
0.5A
0.25A
0.5A
0.25A
0.5A
0.25A
Switch Standards:
Approvals Available
EN 60730, EN 61058 and UL 508
CE, BEAB, CSA, DEMCO, IMQ, KEMA, NEMCO, OVE, SEMCO, SET I, SEV, UL, VDE. Approved to BS 3955 part III
Note: Dry Switching
If switching low power circuits, low current (4 to 100 milliamperes) and low voltage (below 30V), consult herga for special switches.
NB - Herga do not accept liability for any vacuum operated device used outside the pressure range specified by the company.
1999
FOR FURTHER INFORMATION TEL: +44 (0)1284 701422 FAX: +44 (0)1284 753112
ISSUE 01
As a consequence of our policy of continual improvement, we reserve the right to change without notice any detail in this publication. Please see our Conditions of Sale.
6721 / 6722 ~ Vacuum Switches
mm
Hg
-50
-40
-30
-20
-10
-5
0
Suitability for use with different operating media
In
WG
Vacuum Medium
Diaphragms
-30
-25
-20
REDUCING VACUUM
6721-03
-15
-10
0
0
0
5
6721
Chemical Compatibility
✓
✓
✓
✓
✓
Acetone
-10
-20
-30
-40
-50
Ammonia (Liquid)
Amyl Alcohol to 20˚C
Automotive Brake Fluid
Beer
6721-06
10
15
20
25
30
Benzyl Alcohol
Butane
Carbon Dioxide - Dry
Citric Acid
Copper Sulphate (Sol.)
Compressed Air
Cutting Oil
Diesel Oil
Detergent Solution
Fuel Oil
Glycol
Hydraulic Oil
Hydrogen
Lubricating Oil
Milk
Mineral Oil
Natural Gas
Nitric Acid (Dil.)
Oxygen to 70˚C
Petrol
Plating Solution (Chrome)
Salt Water
Sewage
Sulphur Dioxide
Turpentine
Vinegar
Water
6721-20
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
mm
Hg
In
WG
Chart 1
mm
Hg
-400 -350 -300 -250 -200 -150 -100 -50
In
WG
-225 -200 -175 -150 -125 -100 -75 -80 -25 -10
-25
-50
REDUCING VACUUM
6721-30
-50
✓
✓
-100
-150
-200
-250
-300
-350
-400
-450
-500
-75
✓
✓
-100
-125
-150
-175
-200
-225
-250
-275
✓
✓
✓
6721-40
✓
✓
✓
✓
✓
mm
Hg
In
WG
Chart 2
Key:
✓ = Recommended
✓
= Suitable with modification
Note: Differentials are approximate
= Not suitable
Alternative Vacuum Connections
1
Back entry /8” BSPT and NPT Connectors
1999
FOR FURTHER INFORMATION TEL: +44 (0)1284 701422 FAX: +44 (0)1284 753112
ISSUE 01
As a consequence of our policy of continual improvement, we reserve the right to change without notice any detail in this publication. Please see our Conditions of Sale.
Pressure Conversion Table
P.S.I
1.0
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.9
2.0
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
2.9
3.0
3.1
3.2
3.3
3.4
3.5
3.6
3.7
3.8
3.9
4.0
4.1
4.2
4.3
4.4
4.5
4.6
4.7
4.8
4.9
5.0
5.1
5.2
5.3
5.4
5.5
in/H20 in/Hg mm/H20 mm/Hg kg/cm2
bar
mbar
Pa
kPa
P.S.I
5.6
in/H20 in/Hg mm/H20 mm/Hg kg/cm2
bar
mbar
Pa
kPa
27.71 2.036 703.1 51.75 .0703 .0689 68.95
30.45 2.240 773.4 56.89 .0773 .0758 75.84
33.22 2.443 843.7 62.06 .0844 .0827 82.74
35.98 2.647 914.0 67.23 .0914 .0896 89.63
38.75 2.850 984.3 72.40 .0984 .0965 96.52
6895
7584
8274
8963
9652
6.895
7.584
8.274
8.963
9.652
155.0 11.40
157.8 11.60
160.5 11.81
163.3 12.01
166.1 12.22
168.8 12.42
171.6 12.62
174.4 12.83
177.2 13.03
179.9 13.23
182.7 13.44
185.5 13.64
188.2 13.84
191.0 14.05
193.8 14.25
196.5 14.46
199.3 14.66
202.1 14.86
204.8 15.07
207.6 15.27
210.4 15.47
215.9 15.88
221.4 16.29
227.0 16.70
232.5 17.10
238.0 17.51
243.6 17.92
249.1 18.32
254.7 18.73
260.2 19.14
265.7 19.54
271.3 19.95
276.8 20.36
304.5 22.40
332.2 24.43
359.8 26.47
387.5 28.50
3937
4008
4078
4148
4218
4289
4359
4429
4500
4570
4640
4711
4781
4851
4922
4992
5062
5132
5203
5273
5343
5484
5625
5765
5906
6047
6187
6328
6468
6609
6750
6890
7031
7734
8437
9140
9843
289.6 .3937 .3861 386.1 38610 38.61
294.8 .4007 .3930 393.0 39300 39.30
299.9 .4078 .3999 399.9 39990 39.99
305.1 .4148 .4068 406.8 40680 40.68
310.3 .4218 .4137 413.7 41370 41.37
315.5 .4289 .4206 420.6 42060 42.06
320.6 .4359 .4275 427.5 42750 42.75
325.8 .4429 .4344 434.4 43440 43.44
331.0 .4500 .4413 441.3 44130 44.13
336.1 .4570 .4482 448.2 44820 44.82
5.7
5.8
5.9
6.0
41.52 3.054
44.29 3.258
47.06 3.461
49.82 3.665
52.59 3.868
55.36 4.072
58.13 4.276
60.90 4.479
63.67 4.683
66.43 4.886
69.20 5.090
71.97 5.294
74.74 5.497
77.51 5.701
80.27 5.904
83.04 6.108
85.81 6.312
88.58 6.515
91.35 6.719
94.11 6.922
96.88 7.126
99.65 7.330
102.4 7.533
105.2 7.737
108.0 7.940
110.7 8.144
113.5 8.348
116.3 8.551
119.0 8.775
121.8 8.958
124.6 9.162
127.3 9.366
130.1 9.569
132.9 9.773
135.6 9.976
138.4 10.18
141.2 10.38
143.9 10.59
146.7 10.79
149.5 10.99
152.2 11.20
1055
1125
1195
1266
1336
1406
1476
1547
1617
1687
1758
1828
1898
1969
2039
2109
2180
2250
2320
2390
2461
2531
2601
2672
2742
2812
2883
2953
3023
3094
2164
3234
3304
3375
3445
3515
3586
3656
3726
3797
3867
77.57 .1055 .1034 103.4 10340 10.34
82.74 .1125 1103 110.3 11030 11.03
87.92 .1195 .1172 117.2 11720 11.72
6.1
6.2
6.3
93.09 .1266
98.26 .1336
1241
1310
124.1 12410 12.41
131.0 13100 13.10
6.4
6.5
103.4 .1406 .1379 137.9 13790 13.79
108.6 .1476 .1448 144.8 14480 14.48
113.8 .1547 .1517 151.7 15170 15.17
118.9 .1617 .1586 158.6 15860 15.86
124.1 .1687 .1655 165.5 16550 16.55
129.3 .1758 .1724 172.4 17240 17.24
134.5 .1828 .1793 179.3 17930 17.93
139.6 .1898 .1862 186.2 18620 18.62
144.8 .1968 .1930 193.0 19300 19.30
150.0 .2039 .1999 199.9 19990 19.99
155.1 .2109 .2068 206.8 20680 20.68
160.3 .2180 .2137 213.7 21370 21.37
165.5 .2250 .2206 220.6 22060 22.06
170.7 .2320 .2275 227.5 22750 22.75
175.8 .2390 .2344 234.4 23440 23.44
181.0 .2461 .2413 241.3 24130 24.13
186.2 .2531 .2482 248.2 24820 24.82
191.3 .2601 .2551 255.1 25510 25.51
196.5 .2672 .2620 262.0 26200 26.20
201.7 .2742 .2689 268.9 26890 26.89
206.9 .2812 .2758 275.8 27580 27.58
212.0 .2883 .2827 282.7 28270 28.27
217.2 .2953 .2896 289.6 28960 28.96
222.4 .3023 .2965 296.5 29650 29.65
227.5 .3094 .3034 303.4 30338 30.34
232.7 .3164 .3103 310.3 31030 31.03
237.9 .3234 .3172 317.2 31720 31.72
243.1 .3304 .3240 324.0 32400 32.40
248.2 .3375 .3310 331.0 33100 33.10
253.4 .3445 .3378 337.8 33780 33.78
258.6 .3515 .3447 344.7 34470 34.47
263.7 .3586 .3516 351.6 35160 35.16
268.9 .3656 .3585 358.5 35850 35.85
274.1 .3726 .3654 365.4 36540 36.54
279.3 .3797 .3723 372.3 37230 37.23
284.4 .3867 .3792 379.2 37920 37.92
6.6
341.3
4640
.4550 455.0 45500 45.50
6.7
346.5 .4710 .4619 461.9 46190 46.19
351.7 .4781 .4688 468.8 46880 46.88
356.8 .4851 .4757 475.7 47570 47.57
362.0 .4921 .4826 482.6 48260 48.26
367.2 .4992 .4895 489.5 48950 48.95
372.3 .5062 .4964 496.4 49640 49.64
377.5 .5132 .5033 503.3 50330 50.33
382.7 .5203 .5102 510.2 51020 51.02
387.9 .5273 .5171 517.1 51710 51.71
393.0 .5343 .5240 524.0 52400 52.40
403.4 .5484 .5378 537.8 53780 53.78
413.7 .5625 .5516 551.6 55160 55.16
424.1 .5765 .5654 565.4 56540 56.54
434.4 .5906 .5792 579.2 57920 57.92
444.7 .6046 .5929 592.9 59290 59.29
455.1 .6187 .6067 606.7 60670 60.67
465.4 .6328 .6205 620.5 62050 62.05
475.8 .6468 .6343 634.3 63430 63.43
486.1 .6609 .6481 648.1 64810 64.81
496.5 .6749 .6619 661.9 66190 66.19
506.8 .6890 .6757 675.7 67570 67.57
517.1 .7031 .6895 689.5 68950 68.95
568.9 .7734 .7584 758.4 75840 75.84
620.6 .8437 .8274 827.4 82740 82.74
672.3 .9140 .8963 896.3 98630 89.63
724.0 .9843 .9652 965.2 96520 96.52
6.8
6.9
7.0
7.1
7.2
7.3
7.4
7.5
7.6
7.8
8.0
8.2
8.4
8.6
8.8
9.0
9.2
9.4
9.6
9.8
10.0
11.0
12.0
13.0
14.0
14.7
15.0
16.0
17.0
18.0
19.0
20.0
25.0
406.9 29.93 10340 760.2 1.033 1.014
415.2 30.54 10550 775.7 1.055 1.034
442.9 32.58 11250 827.4 1.125 1.103
470.6 34.61 11950 879.1 1.195 1.172
498.2 36.65 12660 930.9 1.265 1.241
525.9 38.68 13360 982.6 1.336 1.310
1014 101400 101.4
1034 103400 103.4
1103 110300 110.3
1172 117200 117.2
1241 124100 124.1
1310 131000 131.0
1379 137900 137.9
1724 172400 172. 4
553.6 40.72 14060 1034
692.0 50.90 17580 1293
1.406 1.379
1.758 1.724
Pressure Conversions
Lbf/ln = Pounds force
per square inch (psi)
Flow
Liquid
MI = Millilitre
Fl oz = Fluid Ounce
Force
N = Newton
Lbf = Pounds force
Kgf = Kilogram force
Weight
2
3
dm /s = Cubic decimetres per second
3
ft /Min = Cubic feet per minute
Kg = Kilogram
Lb = Pound
1/Min = Litres per minute
1 psi = 27.6804 in/H2O
1 psi = 2.03602 in/Hg
1 psi = 68.9476 mbar
1 psi = 703.082 mm/H2O
1 psi = 0.0689 bar
1MI = 0.0352 Fl/oz
1 Litre = 0.21998 UK
Gallon
3
3
1dm /s = 2.119 ft /Min
1 N = 0.225Lbf
1 N = 0102Kgf
1Kg = 2.2045Lb
3
1dm /s = 60 Litres/Min
3
1Lt/Min = 0.0353 ft /Min
1 in/H2O = 25.4 mm/H2O
1 in/H2O = 1.86832 mm/Hg
1 in/H2O = 2.49089
1999
FOR FURTHER INFORMATION TEL: +44 (0)1284 701422 FAX: +44 (0)1284 753112
ISSUE 01
As a consequence of our policy of continual improvement, we reserve the right to change without notice any detail in this publication. Please see our Conditions of Sale.
Certification Markings
Country
Agency
Mark
Country
Agency
Mark
Australia
SAA
Japan
MITI
Austria
OVE
EMA
Netherlands
New Zealand
KEMA
EUR
K
CEBEC
Belgium
CEBEC
SECV
SECQ
SECWA
EANSW
ETSA
Canada
CSA
HECT
SANZ
Denmark
Europe
DEMKO
MANY
D
Norway
NEMKO
Republic of
South Africa
SABS
SEMKO
SEV
Finland
FEI
FI
Sweden
France
UTE
VDE
Switzerland
United Kingdom
Germany
ASTA
BSI
B
S
India
ISI
BEAB
BEAB
UL
Ireland
IIRS
or
United States
®
®
Italy
IMQ
1999
FOR FURTHER INFORMATION TEL: +44 (0)1284 701422 FAX: +44 (0)1284 753112
ISSUE 01
As a consequence of our policy of continual improvement, we reserve the right to change without notice any detail in this publication. Please see our Conditions of Sale.
Accessories: Switch Housings
Benefits
❖ IP40 and IP67 Housings with rear fixing positions
❖ Variations of air or electrical connections
❖ Back entry versions for pressure switch connections
❖ Available for all herga switching systems
❖ Unlimited options available - contact herga with your
❖ Custom designed labels and housing colours available for
requirements
volume OEM requirements
Part Number: 6819-00 Variants
Part Number: 6816-00 Variants
Diecast aluminium housing for
airswitch types except 6806 models.
Finished in blue stove enamel. Ideal
for use where electrical screening is
required.
Part Number: 6819-01
The most economical and compact
housing, produced especially for
hergair switches. Double insulated
sealed enclosure is moulded in two
tone black and white ABS as standard.
The lid has an integral rubber sealing
gasket and captive screws. Mounting
holes and lid fixing screws are outside
the seal, thus preventing the ingress of
moisture and making the box
waterproof to IP65.
Blue flexible PVC protective boot for
air and pressure switch types 6721,
6731, 6741, 6861, 6863 and 6869.
Covers all electrical connections and
grips round outside of switch body.
Can be used with cable 5mm to 9mm
diameter.
Other colour variants are available
upon request as are specified fixing
positions to suit your requirements.
We recommend a cable restraint is
used in connection with this part.
Where a number of airswitches are to
be fitted in one box, herga can supply
a variety of special boxes complete
with multi-way air connectors and
electrical connections as required.
The standard 6819-00 housing is
supplied with a cable gland for cable
diameter 5mm to 7mm and a type
6418-00 air tube connector is fitted.
Note:
Herga can offer many other variants of electrical housings in size and colour up to IP67. We
also manufacture world-wide (plug in) switch housings with or without cordsets in conjunction
with our airswitching systems. Please contact us with your specific requirements.
The housing is suitable for all
airswitches except model 6806.
1999
FOR FURTHER INFORMATION TEL: +44 (0)1284 701422 FAX: +44 (0)1284 753112
ISSUE 01
As a consequence of our policy of continual improvement, we reserve the right to change without notice any detail in this publication. Please see our Conditions of Sale.
Rapid Response Form (Photostat and fax back)
It is our goal to give you a response within 24 hours. By completing this form it will help us to help you!
Thank you.
CUSTOMER
CONTACT NAME
TEL:
FAX:
________________________________________________PRESSURE ___________________________________________________VACUUM
INDUSTRY:
MEDICAL
OEM
POOL & SPA
CHEMICAL/PROCESS
END USER
INDUSTRIAL
OTHER ______________________
CLASSIFICATION:
DISTRIBUTOR / RESELLER
OTHER __________________________________
REQUIREMENTS: __________________ PRESSURE. __________________ VACUUM. _________________ DIFFERENTIAL PRESSURE.
IF PRESSURE OR VACUUM MEASURED GAUGE (AS IN CATALOGUE) OR ABSOLUTE? ___________________________________________
________________ INCHES WG _________________ PSI GAUGE
HERGA TO SET WE WILL SET ON RISING
OPERATING RANGE: ______________TO____________±____________
ON FALLING
MAX PRESSURE/VACUUM UNIT WILL BE SUBJECTED TO ___________________________ SETTING PREFERENCE ±__________________
MAX DIFFERENTIAL (DIFF. BETWEEN RISE & FALL) ________________________________ MIN DIFFERENTIAL _______________________
MEDIA GAS ___________________ TEMPERATURE ___________________ AMBIENT ___________________ TO ________________
LIQUID _________________ TEMPERATURE ____________________ MEDIA
___________________ TO ________________
ELECTRICAL: VOLTS ______________ AC _______________/_______________ DC MAX CURRENT: AMPS___________HP___________
______________ RESISTIVE ________________ INDUCTIVE LOAD DESCRIPTION ______________________________________________
APPROVAL NEEDED: UL
CSA
OTHER _______________________________________________________________________
CONTACT CONFIGURATION:
SINGLE POLE
DOUBLE POLE
GOLD CONTACT
MECHANICAL: MOUNTING PREFERENCE 1/8” BSPT BRASS
1/8” NPT BRASS 1/8” NPT STAINLESS PCB MOUNT
1/8” BSPT STAINLESS
SIDE SPOUT CENTRE SPOUT
OTHER ____________________________________________________
APPLICATION (WHAT WILL SWITCH CONTROL?)
________________________________________________________________________
________________________________________________________________________
QUANTITY REQUIRED FOR PROTOTYPE?
ANNUAL PRODUCTION QUANTITY?
CURRENT SWITCH USED?
___________________________________
___________________________________
___________________________________
REQUIRED DATE ________________________
START DATE ___________________________
PRICE RANGE __________________________
ANY PROBLEMS WITH PRESENT UNIT?
_____________________________________________________________________________
_____________________________________________________________________________
1999
FOR FURTHER INFORMATION TEL: +44 (0)1284 701422 FAX: +44 (0)1284 753112
ISSUE 01
As a consequence of our policy of continual improvement, we reserve the right to change without notice any detail in this publication. Please see our Conditions of Sale.
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