About Pressure Switches
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Hazardous Location Differential Pressure Switches for Liquids
Tested and verified by UL and C-UL for use where explosive dust or gas are present, these switches have an explosion-proof enclosure that meets NEMA 7 and 9 standards for hazardous locations. They are often used to indicate a filter is clogged in a pump or cooling system. When the differential pressure reaches your setpoint, these switches can turn equipment on and off, activate automated controls, or signal alarms. They are single pole, double throw (SPDT) and can be installed to turn one circuit from off to on (normally open) or from on to off (normally closed).
In addition to being UL and C-UL listed, these switches are CE marked, so they also meet European safety standards. All switches are IP and NEMA rated for use outdoors and to protect against some corrosion, dust, and washdowns.
For technical drawings and 3-D models, click on a part number.
| Setpoint Range | Approximate Difference Between Setpoint and Reset Point | Max. Input Pressure, psi | Accuracy | Max. Switching Current | Process Temp. Range, °F | Connection Material | For Use With | Environmental Rating | Each | |
Screw Terminals | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
1/4 NPT Female Pipe Connection | ||||||||||
| 5-80 in. of H2O | 2.5 in. of H2O | 225 | ±0.5% | 15 A @ 125 V AC 15 A @ 250 V AC 15 A @ 480 V AC 1 A @ 48 V DC 2 A @ 30 V DC 500 mA @ 125 V DC | -10° to 200° | Aluminum | Diesel Fuel, Gasoline, Hydraulic Oil (Petroleum Based), Water | IP66; NEC Class I Divisions 1, 2 Groups B, C, D; NEC Class II Divisions 1, 2 Groups E, F, G; NEMA 4X; NEMA 7; NEMA 9 | 0000000 | 0000000 |
| 2-20 psi | 0.2 psi | 225 | ±0.5% | 15 A @ 125 V AC 15 A @ 250 V AC 15 A @ 480 V AC 1 A @ 48 V DC 2 A @ 30 V DC 500 mA @ 125 V DC | -10° to 200° | Aluminum | Diesel Fuel, Gasoline, Hydraulic Oil (Petroleum Based), Water | IP66; NEC Class I Divisions 1, 2 Groups B, C, D; NEC Class II Divisions 1, 2 Groups E, F, G; NEMA 4X; NEMA 7; NEMA 9 | 0000000 | 000000 |
| 3-30 psi | 0.25 psi | 225 | ±0.5% | 15 A @ 125 V AC 15 A @ 250 V AC 15 A @ 480 V AC 1 A @ 48 V DC 2 A @ 30 V DC 500 mA @ 125 V DC | -10° to 200° | Aluminum | Diesel Fuel, Gasoline, Hydraulic Oil (Petroleum Based), Water | IP66; NEC Class I Divisions 1, 2 Groups B, C, D; NEC Class II Divisions 1, 2 Groups E, F, G; NEMA 4X; NEMA 7; NEMA 9 | 0000000 | 000000 |
| 10-100 psi | 0.6 psi | 225 | ±0.5% | 15 A @ 125 V AC 15 A @ 250 V AC 15 A @ 480 V AC 1 A @ 48 V DC 2 A @ 30 V DC 500 mA @ 125 V DC | -10° to 200° | Aluminum | Diesel Fuel, Gasoline, Hydraulic Oil (Petroleum Based), Water | IP66; NEC Class I Divisions 1, 2 Groups B, C, D; NEC Class II Divisions 1, 2 Groups E, F, G; NEMA 4X; NEMA 7; NEMA 9 | 0000000 | 000000 |