Maximum Setpoint Maximum Setpoint |
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For Use With For Use With |
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Minimum Setpoint Minimum Setpoint |
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Operates On Operates On |
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Switch Starting Position Switch Starting Position |
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Scale Scale |
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Maximum Switching Current Maximum Switching Current |
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Connection Material Connection Material |
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Wire Connection Type Wire Connection Type |
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Screw Terminals | Wire Leads |
Gasket Material Gasket Material |
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Maximum Continuous Pressure MaximumContinuous Pressure |
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RoHS (Restriction of Hazardous Substances) RoHS (Restriction ofHazardous Substances) |
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REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration,Evaluation, Authorization and Restriction of Chemicals) |
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About Pressure Switches
More
Low-Pressure Switches


- For Use With:
Style A: Air, Diesel Fuel, Hydraulic Fluid, Water
Style B: Air, Hydraulic Fluid (Petroleum Based) - Connection Material: See table
- Connection: NPT Male
- Maximum Switching Current:
Style A: 10A @ 125V AC, 10A @ 250V AC, 3A @ 480V AC
Style B: 15A @ 125V AC, 15A @ 250V AC, 15A @ 480V AC, 1A @ 30V DC, 30mA @ 125V DC
Sensitive to low pressures, these switches electrically activate automated controls or alarms when a set pressure is reached. They are often used in heating and ventilation systems. Switches are single pole, double throw (SPDT), so they switch one circuit on or off. They can be wired normally open (NO) or normally closed (NC). Switches are rated NEMA 1 for indoor use.
Switches with polycarbonate housing absorb vibration to avoid false switch activation caused by high-vibration applications.
Temperature Range, °F | Conduit | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Setpoint, psi | Approximate Difference Between Setpoint and Reset Point, psi | Max. Short-Term Pressure, psi | Accuracy | Pipe Size | Environment | Process | For Trade Size | Connection Gender | Specifications Met | Each | ||
Brass Connection | ||||||||||||
A | 0.6-14.2 | 0.65 | 1,000 | ±2% | 1/2 | -20° to 165° | -20° to 165° | __ | __ | UL Recognized Component, CSA Certified | 00000000 | 0000000 |
A | 3 1/2-82 | 4 | 1,000 | ±2% | 1/2 | -20° to 165° | -20° to 165° | __ | __ | UL Recognized Component, CSA Certified | 00000000 | 000000 |
Aluminum Connection—Polycarbonate Plastic Housing | ||||||||||||
B | 3-30 | 0.85 | 230 | ±1% | 1/4 | 0° to 160° | 0° to 200° | 7/8 | Female | UL Listed, CE Marked | 0000000 | 000000 |
Washdown Low-Pressure Switches




These switches are rated NEMA 4 or 4X for protection from dirt and washdowns. Sensitive to low pressures, they electrically activate automated controls or alarms when a set pressure is reached. Switches are single pole, double throw (SPDT), so they switch one circuit on or off. They can be wired normally open (NO) or normally closed (NC).
Style D has two setpoints, so it can control two independent circuits.


- For Use With: Air, Diesel Fuel, Hydraulic Fluid, Water
- Connection Material:
Style A: Brass
Style B: 304 Stainless Steel - Connection:
Style A: 1/2 NPT Male
Style B: 1/4 NPT Female - Maximum Switching Current: 10A @ 125V AC, 10A @ 250V AC, 3A @ 480V AC
Temp. Range, °F | Conduit | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Setpoint, psi | Approximate Difference Between Setpoint and Reset Point, psi | Max. Short-Term Pressure, psi | Accuracy | Environment | Process | For Trade Size | Connection | Industry Designation | Environmental Rating | Specifications Met | Each | |
Style A | ||||||||||||
0.6-14.2 | 0.65 | 1,000 | ±2% | -20° to 165° | -20° to 165° | 1/2 | NPT Female | SPDT | IP65; NEMA 4 | CSA Certified, UL Listed | 00000000 | 0000000 |
3.5-82 | 4 | 1,000 | ±2% | -20° to 165° | -20° to 165° | 1/2 | NPT Female | SPDT | IP65; NEMA 4 | CSA Certified, UL Listed | 00000000 | 000000 |
Style B | ||||||||||||
0.068-1.6 | 0.04 | 3 | ±0.5% | -65° to 165° | -65° to 165° | 1/2 | NPT Female | SPDT | NEMA 4 | __ | 0000000 | 000000 |
0.18-2.8 | 0.11 | 10 | ±0.5% | -65° to 165° | -65° to 165° | 1/2 | NPT Female | SPDT | NEMA 4 | __ | 0000000 | 000000 |
0.66-17 | 0.19 | 60 | ±0.5% | -65° to 165° | -65° to 165° | 1/2 | NPT Female | SPDT | NEMA 4 | __ | 0000000 | 000000 |


- For Use With: Air, Diesel Fuel, Gasoline, Hydraulic Fluid, Water
- Connection Material: 316 Stainless Steel
- Connection: 1/4 NPT Female
- Maximum Switching Current: See table
Temp. Range, °F | Conduit | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Setpoint, in. of H2O | Approximate Difference Between Setpoint and Reset Point, in. of H2O | Max. Short-Term Pressure, psi | Accuracy | Maximum Switching Current | Environment | Process | For Trade Size | Connection | Industry Designation | Environmental Rating | Specifications Met | Each | |
Style C | |||||||||||||
4.5-30 | 2.5 | 20 | ±1% | 15 A @ 125 V AC, 15 A @ 250 V AC, 15 A @ 480 V AC, 6 A @ 30 V DC, 500 mA @ 125 V DC, 250 mA @ 250 V DC | -20° to 150° | 20° to 300° | 3/4 | NPT Female | SPDT | IP66; NEMA 4X | C-UL Listed, CE Marked, CSA Certified, CSA-US Certified, FM Approved, UL Listed | 00000000 | 0000000 |
Style D | |||||||||||||
4.5-30 | 4.5 | 20 | ±1% | 15 A @ 125 V AC, 15 A @ 250 V AC, 15 A @ 480 V AC, 500 mA @ 125 V DC, 250 mA @ 250 V DC | -20° to 150° | 20° to 300° | 3/4 | NPT Female | SPDT | IP66; NEMA 4X | CE Marked, CSA Certified, CSA-US Certified, FM Approved, UL Listed | 00000000 | 000000 |
Adjustable-Reset Pressure Switches

Choose when these switches reset to control the pressure range between when they activate and deactivate, commonly referred to as deadband and differential. You can adjust their reset point anywhere along the setpoint range. When they reach the set pressure, these switches power equipment, signal controls, or trigger alarms. They’re single pole, double throw (SPDT) and can either turn one device from off to on (normally open) or on to off (normally closed). An on/off indicator tells you the status of your equipment, letting you monitor your equipment even when it’s out of sight.
All are NEMA rated to protect their parts from dirt and stand up to some corrosion, but they shouldn’t be used outdoors. UL listed and CSA certified, they also meet American and Canadian safety standards.
Setpoint, psi | Approximate Difference Between Setpoint and Reset Point | Max. Continuous Pressure, psi | Max. Short-Term Pressure, psi | Accuracy | Max. Switching Current @ Voltage | Process Temperature Range, °F | Connection Material | For Use With | Environmental Rating | Each | |
Screw Terminals | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
1/4 NPT Male Pipe Connection | |||||||||||
1/8-15 | Adjustable | 15 | 15 | ±1% | 10 A @ 120 V AC 10 A @ 240 V AC | 35° to 180° | Brass | Air, Diesel Fuel, Hydraulic Fluid, Water | NEMA 1 | 0000000 | 0000000 |
2-60 | Adjustable | 60 | 60 | ±1% | 10 A @ 120 V AC 10 A @ 240 V AC | 35° to 180° | Brass | Air, Diesel Fuel, Hydraulic Fluid, Water | NEMA 1 | 0000000 | 000000 |
Low Differential Pressure Switches

- For Use With: Air
- Connection Material: Aluminum
- Connection: NPT Female
- Switching Current: 15A
- Switching Voltage: 120V AC/240V AC/480V AC
Often used with ovens, dryers, and HVAC systems, these switches detect small differences in pressure. When the differential pressure exceeds your setpoint, the switch is activated. Use them to automate controls or activate an alarm in your process. Switches are single pole, double throw (SPDT), so they switch one circuit on or off. They can be wired normally open (NO) or normally closed (NC).
Temperature Range, °F | Conduit | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
Setpoint, in. of H2O | Approximate Difference Between Setpoint and Reset Point, in. of H2O | Max. Pressure, in. of H2O | Accuracy | Pipe Size | Environment | Process | For Trade Size | Connection Gender | Specifications Met | Each | |
Zinc-Plated Steel Housing | |||||||||||
0.07-0.15 | 0.04 | 45 | ±3% | 1/8 | -30° to 180° | -30° to 180° | 7/8 | Female | CE Marked, CSA Certified, FM Approved, UL Recognized Component | 00000000 | 000000 |
0.15-0.55 | 0.1 | 45 | ±3% | 1/8 | -30° to 180° | -30° to 180° | 7/8 | Female | CE Marked, CSA Certified, FM Approved, UL Recognized Component | 00000000 | 00000 |
0.4-1.6 | 0.16 | 45 | ±3% | 1/8 | -30° to 180° | -30° to 180° | 7/8 | Female | CE Marked, CSA Certified, FM Approved, UL Recognized Component | 00000000 | 00000 |
1.4-5 1/2 | 0.3 | 45 | ±3% | 1/8 | -30° to 180° | -30° to 180° | 7/8 | Female | CE Marked, CSA Certified, FM Approved, UL Recognized Component | 00000000 | 00000 |
3-11 3/4 | 0.4 | 45 | ±3% | 1/8 | -30° to 180° | -30° to 180° | 7/8 | Female | CE Marked, CSA Certified, FM Approved, UL Recognized Component | 00000000 | 00000 |
4-20 | 0.5 | 45 | ±3% | 1/8 | -30° to 180° | -30° to 180° | 7/8 | Female | CE Marked, CSA Certified, FM Approved, UL Recognized Component | 00000000 | 00000 |
Air-Pressure-Actuated HVAC Switches

Often used to detect clogged air filters and iced air conditioner coils, these switches sense small changes in pressure between two points in your duct.
Setpoint, in. of H2O | Accuracy, in. of H2O | Temperature Range, °F | Current | Electrical Connection Type | Switch Type | Max. Pressure, psi | Low Pressure Side Connection | High Pressure Side Inside Connection | High Pressure Side Outside Connection | Each | |
Diaphragm Sensor | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
0.05-5 | 0.025 | -40° to 165° | 2.9 A @ 240 V AC 5.8 A @ 120 V AC | Hardwire | SPDT | 1 | 1/8 NPT Female | 1/8 NPT Female | 1/2 NPSM | 000000 | 0000000 |
0.05-5 | 0.04 | -40° to 165° | 4.9 A @ 240 V AC 9.8 A @ 120 V AC | Hardwire | SPDT | 1 | 1/8 NPT Female | 1/8 NPT Female | 1/2 NPSM | 000000 | 000000 |