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Explosion-proof Differential Pressure Switch

Series 1950G

The Model 1950G Explosion-Proof 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, & D; Class II, Groups E, F, & G and Class III atmospheres, Directive 94/9/EC (ATEX) Compliant for CE ATEX II 2G Exd IIB+H2 T6, CSA & 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 d IIB+H2 T6 (-40°C < Ta < +60°C). The 1950G is very compact, about half the weight and bulk of equivalent conventional explosion-proof switches.

  • Service: Air and compatible combustible gases
  • Wetted Materials: Consult factory
  • Temperature Limits: 0 to 140°F (-17 to 60°C). Note: Set point drift may occur with ambient temperature changes
  • Pressure Limits: 45" w.c. (11.2 kPa) continuous; 10 psig (68.95 kPa) surge
  • Enclosure Rating: NEMA 3 (IP54), NEMA 7 and 9
  • Switch Type: 1 Form C relay (SPDT)
  • Electrical Rating: 10A, 120/240 VAC, 28 VDC. Resistive 50mA, 125 VDC
  • Power Requirements: 24 VDC ±10%. 120 or 240 VAC ±10% optional
  • Electrical Connections: Internal terminal block
  • Process Connections: 1/8" female NPT
  • Mounting Orientation: Diaphragm in vertical position. Consult factory for other position orientations
  • Set Point Adjustment: Screw type on top of housing
  • Weight: 2 lbs 15.7 oz (1.35 kg)
  • Agency Approvals: ATEX, CE, CSA, FM, IECEx, UL.




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