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 11 2 G EExd IIB & Hydrogen T6 and CSA & FM approved for Class I, Div 1, Groups B, C, D; Class II, Div 1, Groups E, F, G, and Class II atmospheres. The 1950 G 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.
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Explosion-Proof
Weatherproof
Compatible with Natural Gases
Differential Pressure Switch
Combustible Gases
Compact Switch
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Service
Air and compatible combustible gases
Switch Type
1 Form C relate (SPDT)
Set Point Adjustment
Screw type on top of housing
Mounting Orientation
Diaphragm in vertical position
Other positions possible
Electrical Rating
10A, 120/240 VAC, 28 VDC. Resistive 50 mA, 125 VDC
Pressure Limits
45" w.c. (11.2 kPa) continuous
10 psig (68.95 kPa) surge |
Enclosure Rating
IP64, NEMA 3, 7 and 9
Process Connections
1/8" female NPT
Agency Approvals
CE, UL, CSA, FM, ATEX
Power Requirements
24 VDC ±10%
120 or 240 VAC ±10% optional
Weight
2 lb, 15.7 oz (1.35 kg)
Temperature Limits
0 to 140oF (18 to 60oC)
Note: Set point drive may occur with ambient temp changes)
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