Product Description
Dwyer Series 1950G Explosion-Proof Differential Pressure Switch, Range 1.4-5.5" w.c., 1950G-5-B-120-NA
PN: 1950G-5-B-120-NA
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, & D; Class II, Groups E, F, & G and Class III atmospheres, Directive 2014/34/EU (ATEX) Compliant for 2813 II 2G Ex db 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 db 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.
Easy access to the SPDT relay and power supply terminals is provided by removing the top plate of the aluminum housing. A supply voltage of 24 VDC, 120 or 240 VAC is required. A captive screw allows the cover to swing aside while remaining attached to the unit. Adjustment to the set point of the switch can be made without disassembly of the housing.
- Service: Air and compatible combustible gases
- Temperature Limits: 0 to 140°F (-17 to 60°C)
- Range, Inches w.c.: 1.4 to 5.5
- Note: Set point drift may occur with ambient temperature changes
- Pressure Limits: 45 in w.c. (11.2 kPa) continuous; 10 psig (68.95 kPa) surge
- Enclosure Rating: NEMA 3 (IP54), NEMA 7 & 9
- Switch Type: 1 Form C relay (SPDT)
- Electrical Rating: 10A, 120/240 VAC, 28 VDC. Resistive 50 mA, 125 VDC
- Electrical Connections: Internal terminal block
- Process Connections: 1/8˝ female NPT
- Mounting Orientation: Diaphragm in vertical position
- Set Point Adjustment: Screw type on top of housing
- Approximate Min. Set Point: .4
- Deadband at Max. Set Point: .9
- Agency Approvals: ATEX, CE, CSA, FM, IECEx, UL
