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This explosion-proof differential pressure switch features an aluminum housing with easy access to the SPDT relay and power supply terminals via a removable top plate. A captive screw allows the cover to remain attached, and the set point can be adjusted without disassembly. Compatible with natural gas applications, it is rated NEMA 3 (IP54), NEMA 7, and NEMA 9 for hazardous locations.
This explosion-proof differential pressure switch features an aluminum housing with easy access to the SPDT relay and power supply terminals via a removable top plate. A captive screw allows the cover to remain attached, and the set point can be adjusted without disassembly. Compatible with natural gas applications, it is rated NEMA 3 (IP54), NEMA 7, and NEMA 9 for hazardous locations.
Series 1950G Explosion-Proof Differential Pressure Switch combines the best features of the popular Dwyer® Series 1950 Pressure Switch with the benefit of natural gas compatibility. Units are rain-tight for outdoor installations, and are UL listed for use in Class I, Groups A, B, C, and D; Class II, Groups E, F, and G and Class III atmospheres, Directive 2014/34/EU (ATEX) Compliant for 2813 II 2G Ex db IIB+H2 T6, CSA and FM approved for Class I, Div. 1, Groups B, C, D; Class II, Div. 1, Groups E, F, G and Class III atmospheres. IECEx Ex db IIB+H2 T6 (-40°C Features Applications
| Deadband | 0.06 to 0.11 inH2O |
| Electrical Connection | Screw terminal |
| Gross Weight Value | 3.3 |
| Materials, Wetted | Consult factory |
| Measurement Pressure Type | Type: Differential Maximum: 0.5 inH₂O Minimum: 0.15 inH₂O |
| Media Compatibility | Clean dry air/inert gas, fuel gases, HVAC/room air, inert/non-reactive gases, combustible gases, helium, hydrogen, methane, nitrogen, non-corrosive dry gases, propane, propane |
| Mounting Orientation | Vertical diaphragm |
| Operating Temperature, Max | Maximum: 140°F (140°C) Minimum: 0°F (-17°C) |
| Process Connection Size | Size: 1/8" (3.1 mm) Type: NPT Female |
| Proof Pressure | Up to 45 inH2O |
| Series ID | Series-1950G |
| Set Point Adjustment | External screw |
| Switch | Note: 1 form C relay (SPDT), 10 A, 120/240 V AC, 28 V DC. Resistive 50 mA, 125 V DC Rating 10 A @ 120/240 V AC/28 V DC 50 mA @ 125 V DC Type: SPDT NO/NC, Selectable |
| Power | Type: DC Supply voltage: 24 V DC |
| Country of Origin | United States |
| Weight | 2.9 lbs (1.35 kg) |
| Deadband | 0.06 to 0.11 inH2O |
| Electrical Connection | Screw terminal |
| Gross Weight Value | 3.3 |
| Materials, Wetted | Consult factory |
| Measurement Pressure Type | Type: Differential Maximum: 0.5 inH₂O Minimum: 0.15 inH₂O |
| Media Compatibility | Clean dry air/inert gas, fuel gases, HVAC/room air, inert/non-reactive gases, combustible gases, helium, hydrogen, methane, nitrogen, non-corrosive dry gases, propane, propane |
| Mounting Orientation | Vertical diaphragm |
| Operating Temperature, Max | Maximum: 140°F (140°C) Minimum: 0°F (-17°C) |
| Process Connection Size | Size: 1/8" (3.1 mm) Type: NPT Female |
| Proof Pressure | Up to 45 inH2O |
| Series ID | Series-1950G |
| Set Point Adjustment | External screw |
| Switch | Note: 1 form C relay (SPDT), 10 A, 120/240 V AC, 28 V DC. Resistive 50 mA, 125 V DC Rating 10 A @ 120/240 V AC/28 V DC 50 mA @ 125 V DC Type: SPDT NO/NC, Selectable |
| Power | Type: DC Supply voltage: 24 V DC |
| Country of Origin | United States |
| Weight | 2.9 lbs (1.35 kg) |
