Pressure Switches
Shop NEMA pressure switches for compressed-air systems, including single-phase, three-phase and Expotherm 2 overload-protected models.
Pressure Switches for Air Compressors
Pressure switches automatically control suitable electric air compressors by switching the compressor on and off in response to system pressure.
The current NEMA range includes 12 bar models with 1/4" connections, 1-way, 2-way and 4-way configurations, plus single-phase and three-phase options.
Expotherm 2 versions are also available with integrated overload protection for selected motor sizes and voltages.
Shop NEMA Pressure Switches
Browse the live range below. Product images, current pricing and stock status are pulled directly from WooCommerce.
-
Sale!
Pressure SwitchesF-321050000 | Danfoss Compressor Pressure Control – 1-Way 400V
Original price was: £144.73.£123.02Current price is: £123.02. exc vat. Add to basketDanfoss Pressure Control – 1 way 0 1/4” Controller 14 Three 3 400 None. Compressor pressure switch identified by manufacturer reference F-321050000. Designed to control compressor start and stop operation at the specified pressure range on a compatible installation; confirm pressure range, electrical phase and rating, port arrangement, unloader connection and manufacturer reference before ordering.
In StockOriginal price was: £144.73.£123.02Current price is: £123.02. exc vat. -
Sale!
Pressure SwitchesNEMA Pressure Switch Expotherm 2 (2.2KW) | 12 BAR, 1/4, 4 Way, 3 Pole, 400 Volts with Overload 4 – 6.3a
Original price was: £172.46.£122.50Current price is: £122.50. exc vat. Add to basket2.2 kW NEMA Expotherm 2 compressor pressure switch rated to 12 Bar, with 1/4 connection, 4-way configuration, 3-pole 400V arrangement and 4–6.3A overload range for compatible compressor control systems.
In StockOriginal price was: £172.46.£122.50Current price is: £122.50. exc vat. -
Sale!
Pressure SwitchesNEMA Pressure Switch Expotherm 2 (4 KW) | 12 BAR, 1/4, 4 Way, 3 Pole, 400 Volt with Overload 6.3 – 10a
Original price was: £172.46.£122.50Current price is: £122.50. exc vat. Add to basket4 kW NEMA Expotherm 2 compressor pressure switch rated to 12 Bar, with 1/4 connection, 4-way configuration, 3-pole 400V arrangement and 6.3–10A overload range for compatible compressor control systems.
In StockOriginal price was: £172.46.£122.50Current price is: £122.50. exc vat. -
Sale!
Pressure SwitchesNEMA Pressure Switch Expotherm 2 (4 KW) | 12 BAR, 1/4, 4 Way, 3 Pole, 500 Volt with Overload 6.3 – 10a
Original price was: £178.49.£151.72Current price is: £151.72. exc vat. Add to basket4 kW NEMA Expotherm 2 compressor pressure switch rated to 12 Bar, with 1/4 connection, 4-way configuration, 3-pole 500V arrangement and 6.3–10A overload range for compatible compressor control systems.
In StockOriginal price was: £178.49.£151.72Current price is: £151.72. exc vat. -
Sale!
Pressure SwitchesNEMA Pressure Switch Expotherm 2 (5.5 KW) | 12 BAR, 1/4, 4 Way, 3 Pole, 400 Volt with Overload 10 – 16a
Original price was: £172.46.£122.50Current price is: £122.50. exc vat. Add to basket5.5 kW NEMA Expotherm 2 compressor pressure switch rated to 12 Bar, with 1/4 connection, 4-way configuration, 3-pole 400V arrangement and 10–16A overload range for compatible compressor control systems.
In StockOriginal price was: £172.46.£122.50Current price is: £122.50. exc vat. -
Sale!
Pressure SwitchesNEMA S-4100688 Pressure Switch | 12 BAR, 1/4, 4 Way, 1 Phase
Original price was: £52.74.£40.00Current price is: £40.00. exc vat. Add to basketNEMA S-4100688 Pressure Switch | 12 Bar, 1/4, 4 Way, 1 Phase. Replacement compressor pressure switch with a 12 Bar rating, 1/4 connection, 4 way configuration and 1 phase electrical arrangement. Confirm the existing switch reference and wiring configuration before ordering.
In StockOriginal price was: £52.74.£40.00Current price is: £40.00. exc vat. -
Sale!
Pressure SwitchesNEMA S-4100694 Pressure Switch | 12 BAR, 1/4, 4 Way, 3 Phase
Original price was: £74.25.£51.67Current price is: £51.67. exc vat. Add to basketNEMA S-4100694 Pressure Switch | 12 Bar, 1/4, 4 Way, 3 Phase. Replacement compressor pressure switch with a 12 Bar rating, 1/4 connection, 4 way configuration and 3 phase electrical arrangement. Confirm the existing switch reference and wiring configuration before ordering.
In StockOriginal price was: £74.25.£51.67Current price is: £51.67. exc vat. -
Sale!
Pressure SwitchesNEMA S-4101390 Pressure Switch | 12 BAR, 1/4, 2 Way, 1 Phase
Original price was: £30.31.£17.83Current price is: £17.83. exc vat. Add to basketNEMA S-4101390 Pressure Switch | 12 Bar, 1/4, 2 Way, 1 Phase. Replacement compressor pressure switch with a 12 Bar rating, 1/4 connection, 2 way configuration and 1 phase electrical arrangement. Confirm the existing switch reference and wiring configuration before ordering.
In StockOriginal price was: £30.31.£17.83Current price is: £17.83. exc vat. -
Sale!
Pressure SwitchesNEMA S-9063002 Pressure Switch | 12 BAR, 1/4, 1 Way, 1 Phase
Original price was: £56.06.£42.50Current price is: £42.50. exc vat. Add to basketNEMA S-9063002 Pressure Switch | 12 Bar, 1/4, 1 Way, 1 Phase. Replacement compressor pressure switch with a 12 Bar rating, 1/4 connection, 1 way configuration and 1 phase electrical arrangement. Confirm the existing switch reference and wiring configuration before ordering.
In StockOriginal price was: £56.06.£42.50Current price is: £42.50. exc vat. -
Sale!
Pressure SwitchesNEMA S-9063007 Pressure Switch | 12 BAR, 1/4, 1 Way, 3 Phase
Original price was: £65.71.£48.33Current price is: £48.33. exc vat. Add to basketNEMA S-9063007 Pressure Switch | 12 Bar, 1/4, 1 Way, 3 Phase. Replacement compressor pressure switch with a 12 Bar rating, 1/4 connection, 1 way configuration and 3 phase electrical arrangement. Confirm the existing switch reference and wiring configuration before ordering.
In StockOriginal price was: £65.71.£48.33Current price is: £48.33. exc vat. -
Sale!Pressure Switches
S-4100686 | Pressure Switch – 4-Way 2-4 Bar 250V 6-8A
Original price was: £46.73.£39.72Current price is: £39.72. exc vat. Add to basketCondor Pressure Switch MDR2 – 4 way 3 x 1/4” 1/4” Rotary 6 to 8 Single 2 250 20 None. Compressor pressure switch identified by manufacturer reference S-4100686. Designed to control compressor start and stop operation at the specified pressure range on a compatible installation; confirm pressure range, electrical phase and rating, port arrangement, unloader connection and manufacturer reference before ordering.
In StockOriginal price was: £46.73.£39.72Current price is: £39.72. exc vat. -
Sale!Pressure Switches
S-9063018 | Condor MDR2 Compressor Pressure Switch – 4-Way 2-4 Bar 230V 6-8A
Original price was: £93.65.£72.50Current price is: £72.50. exc vat. Add to basketCONDOR MDR2 – 4 way 3 x 1/4” 3/8” Rotary 6 to 8 Single 2 230 20 None. Compressed-air spare part or accessory identified by manufacturer reference S-9063018. Designed to serve the specific compressor or compressed-air application identified in the product title; confirm the exact SKU, product description, dimensions or connection details shown, and compatibility with the existing equipment before ordering.
In StockOriginal price was: £93.65.£72.50Current price is: £72.50. exc vat. -
Sale!Pressure Switches
S-9063048 | Condor MDR1/11 Compressor Pressure Switch – 4-Way 11-4 Bar 230V 6-8A
Original price was: £65.29.£48.33Current price is: £48.33. exc vat. Add to basketCONDOR MDR1/11 – 4 way 3 x 1/4” 3/8” Rotary 6 to 8 Single 2 230 20 None. Compressed-air spare part or accessory identified by manufacturer reference S-9063048. Designed to serve the specific compressor or compressed-air application identified in the product title; confirm the exact SKU, product description, dimensions or connection details shown, and compatibility with the existing equipment before ordering.
In StockOriginal price was: £65.29.£48.33Current price is: £48.33. exc vat. -
Sale!Pressure Switches
S-9063069 | Condor MDR3/11 Compressor Pressure Switch – 1-Way 11-1 Bar 400V 10-16A
Original price was: £170.32.£120.83Current price is: £120.83. exc vat. Add to basketCONDOR MDR3/11 – 1 way 0 3/8” Rotary 8 to 10 Three 3 400 16 10 to 16. Compressed-air spare part or accessory identified by manufacturer reference S-9063069. Designed to serve the specific compressor or compressed-air application identified in the product title; confirm the exact SKU, product description, dimensions or connection details shown, and compatibility with the existing equipment before ordering.
In StockOriginal price was: £170.32.£120.83Current price is: £120.83. exc vat. -
Sale!Pressure Switches
S-9063084 | NEMA Compressor Pressure Switch – 4-Way 12 Bar 230V
Original price was: £64.52.£39.16Current price is: £39.16. exc vat. Add to basketNEMA – 4 way 3 x 1/4” 3/8” Pull 12 Single 2 230 16 None. Compressed-air spare part or accessory identified by manufacturer reference S-9063084. Designed to serve the specific compressor or compressed-air application identified in the product title; confirm the exact SKU, product description, dimensions or connection details shown, and compatibility with the existing equipment before ordering.
In StockOriginal price was: £64.52.£39.16Current price is: £39.16. exc vat. -
Sale!Pressure Switches
S-9063096 | NEMA Compressor Pressure Switch – 4-Way 12 Bar 250V
Original price was: £23.15.£19.68Current price is: £19.68. exc vat. Add to basketNema Pressure Switch – 4 way – 110v Volt Max 3 x 1/4” 3/8” Pull 12 Single 2 250 16 None. Compressor pressure switch identified by manufacturer reference S-9063096. Designed to control compressor start and stop operation at the specified pressure range on a compatible installation; confirm pressure range, electrical phase and rating, port arrangement, unloader connection and manufacturer reference before ordering.
In StockOriginal price was: £23.15.£19.68Current price is: £19.68. exc vat. -
Sale!Pressure Switches
S-9063239 | Condor MDR3 Compressor Pressure Switch – 4-Way 3-4 Bar 400V 16-20A
Original price was: £264.79.£171.66Current price is: £171.66. exc vat. Add to basketCONDOR MDR3 – 4 way 3 x 1/4” 1/2” Rotary 11 Three 3 400 20 16 to 20. Compressed-air spare part or accessory identified by manufacturer reference S-9063239. Designed to serve the specific compressor or compressed-air application identified in the product title; confirm the exact SKU, product description, dimensions or connection details shown, and compatibility with the existing equipment before ordering.
In StockOriginal price was: £264.79.£171.66Current price is: £171.66. exc vat. -
Sale!Pressure Switches
S-9063258 | Condor MDR3 Compressor Pressure Switch – 4-Way 3-4 Bar 400V 16-20A
Original price was: £264.79.£180.83Current price is: £180.83. exc vat. Add to basketCONDOR MDR3 – 4 way 3 x 1/4” 1/2” Rotary 16 Three 3 400 20 16 to 20. Compressed-air spare part or accessory identified by manufacturer reference S-9063258. Designed to serve the specific compressor or compressed-air application identified in the product title; confirm the exact SKU, product description, dimensions or connection details shown, and compatibility with the existing equipment before ordering.
In StockOriginal price was: £264.79.£180.83Current price is: £180.83. exc vat. -
Sale!Pressure Switches
S-9063268 | Condor MDR3/11 Compressor Pressure Switch – 4-Way 11-4 Bar 400V 6.3-10A
Original price was: £190.11.£133.33Current price is: £133.33. exc vat. Add to basketCONDOR MDR3/11 – 4 way 3 x 1/4” 3/8” Rotary 8 to 10 Three 3 400 10 6.3 to 10. Compressed-air spare part or accessory identified by manufacturer reference S-9063268. Designed to serve the specific compressor or compressed-air application identified in the product title; confirm the exact SKU, product description, dimensions or connection details shown, and compatibility with the existing equipment before ordering.
In StockOriginal price was: £190.11.£133.33Current price is: £133.33. exc vat. -
Sale!Pressure Switches
S-9063269 | Condor MDR3 Compressor Pressure Switch – 4-Way 3-4 Bar 400V
Original price was: £211.92.£147.50Current price is: £147.50. exc vat. Add to basketCONDOR MDR3 – 4 way 3 x 1/4” 1/2” Rotary 11 Three 3 400 20 6.3. Compressed-air spare part or accessory identified by manufacturer reference S-9063269. Designed to serve the specific compressor or compressed-air application identified in the product title; confirm the exact SKU, product description, dimensions or connection details shown, and compatibility with the existing equipment before ordering.
In StockOriginal price was: £211.92.£147.50Current price is: £147.50. exc vat. -
Sale!Pressure Switches
S-9063270 | Condor MDR3 Compressor Pressure Switch – 4-Way 3-4 Bar 400V
Original price was: £287.40.£195.00Current price is: £195.00. exc vat. Add to basketCONDOR MDR3 – 4 way 3 x 1/4” 3/8” Rotary 11 Three 3 400 20 16. Compressed-air spare part or accessory identified by manufacturer reference S-9063270. Designed to serve the specific compressor or compressed-air application identified in the product title; confirm the exact SKU, product description, dimensions or connection details shown, and compatibility with the existing equipment before ordering.
In StockOriginal price was: £287.40.£195.00Current price is: £195.00. exc vat. -
Sale!Pressure Switches
S-9063271 | Condor MDR3/11 Compressor Pressure Switch – 4-Way 11-4 Bar 400V 2.5-4A
Original price was: £265.56.£180.83Current price is: £180.83. exc vat. Add to basketCONDOR MDR3/11 – 4 way 3 x 1/4” 3/8” Rotary 6 to 8 Three 3 400 20 2.5 to 4. Compressed-air spare part or accessory identified by manufacturer reference S-9063271. Designed to serve the specific compressor or compressed-air application identified in the product title; confirm the exact SKU, product description, dimensions or connection details shown, and compatibility with the existing equipment before ordering.
In StockOriginal price was: £265.56.£180.83Current price is: £180.83. exc vat.
How to Choose the Correct Pressure Switch
Pressure Range
Confirm the compressor operating pressure and the switch pressure range before ordering.
Electrical Phase
Check whether the compressor uses single-phase or three-phase power.
Way Configuration
Confirm whether the replacement requires a 1-way, 2-way or 4-way connection arrangement.
Overload Protection
Where the switch incorporates overload protection, match the overload range to the motor and electrical requirements.
Pressure Switches with Overload Protection
The current range includes NEMA Expotherm 2 pressure switches with integrated overload protection for selected three-phase compressor applications.
Available versions include options for 2.2 kW, 4 kW and 5.5 kW motors, with selected 400 V and 500 V models.
Single-Phase & Three-Phase Options
The standard pressure-switch range includes both single-phase and three-phase versions in selected 1-way, 2-way and 4-way configurations.
This makes the exact electrical and port arrangement important when replacing an existing switch.
Information to Check
- Existing pressure-switch part number or reference
- Maximum pressure rating
- Single-phase or three-phase supply
- Voltage
- Connection and port arrangement
- Motor power where relevant
- Overload range where fitted
- Compressor manufacturer and model
- Clear photographs of the existing switch and wiring arrangement
Pressure Switch Replacement
Pressure switches combine compressed-air and electrical control functions, so replacement work should only be carried out with the equipment correctly isolated.
- Safely isolate the electrical supply
- Fully depressurise the compressor and receiver
- Confirm wiring and phase arrangement before disconnection
- Match the pressure and overload settings correctly
- Check the completed installation for correct operation
Pressure Switch FAQs
What does an air compressor pressure switch do?
It automatically starts and stops a suitable electric compressor in response to system pressure, helping maintain pressure within the intended operating range.
What pressure rating is available in this range?
The current NEMA range includes selected 12 bar pressure switches.
Are single-phase and three-phase switches available?
Yes. The current range includes both single-phase and three-phase options.
What does 1-way, 2-way or 4-way mean?
It refers to the port or connection arrangement on the pressure switch. The required configuration should match the compressor installation.
What is an Expotherm 2 pressure switch?
The Expotherm 2 models in this range are pressure switches with integrated overload protection for selected compressor motor applications.
Can I choose a replacement by matching the thread only?
No. Pressure rating, phase, voltage, way configuration, overload range and the overall electrical arrangement also need to be checked.
Can Compressed Air Systems UK help identify the correct pressure switch?
Yes. Provide the existing switch reference, compressor model, phase, voltage, motor size and clear photographs where possible.
Not Sure Which Pressure Switch You Need?
Send us the existing switch reference, compressor model and electrical details and our team can help identify the appropriate replacement.
Industries We Support
Support & Aftercare
Our Expert Services
24/7 EMERGENCY BREAKDOWN
Rapid response for all air compressor malfunctions, anytime you need us.
View ServiceINSTALLATIONS
Expert design and bespoke pipework installations tailored to your site.
View ServiceSERVICING
Comprehensive maintenance to keep your air systems running at peak performance.
View ServiceVISIT OUR TRADE COUNTER
Come meet our experts in person at our dedicated Birmingham trade hub.
Get DirectionsSHOP NOW
Browse our full range of air compressors, parts, and industrial tools online.
Go To ShopCONTACT US
Have a question? Reach out to our team today for expert advice and support.
Send Message