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Model 1950 Explosion-Proof Differential Pressure Switch combines the best features of the popular Dwyer series 1900 with an integral explosion-proof and weather-proof housing, making it an exceptional value for either application. it is CE, UL and CSA listed, FM approved for use in Class I, Div 1, Groups C and D, Class II Groups E, F and G, and Class III hazardous atmospheres (NEMA 7 & 9), Raintight (NEMA 3).
Weather proof features include a drain plug and O-ring seal in cover. Electrical connections are easily made by removing the front cover. For convenience, the set point adjustment screw is located on the outside of the housing. Twelve models offer set points from .03 to 20" w.c. (7.5 to 5 kPa) and from .5 to 50 psi (0.035 to 3.5 bar). The unit is very light and compact - about half the weight and bulk of other explosion proof or weather proof swithces with separate enclosures. |
Compact, Low Cost
Explosion-Proof
Weatherproof
Differential Pressure Switch
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Service
Air and non-combustible, compatible gases
Switch Type
Single-pole double-throw (SPDT)
Set Point Adjustment
Screw type on top of housing
Mounting Orientation
Diaphragm in vertical position
Other positions possible
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Enclosure Rating
IP64, NEMA 3, 7 and 9
Process Connections
1/8" female NPT
Agency Approvals
CE, UL, CSA, FM
Weight
3.25 lb (1.5 kg)
1950-02 model: 4.4 lb (2 kg)
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Electrical Rating
15 A @, 125, 250, 480 VAC, 60 Hz Resistive 1/8 HP @ 125 VAC, 1/4 HP @ 250 VAC, 60 Hz
Electrical Connections
3 screw type, common, normally open and normally closed
Pressure Limits
Continuous:
1950's - 45" w.c. (0.11 bar)
1050P's - 35 psi (2.41 bar)
19050P-50 only - 70 psi (4.83 bar)
Surge:
1950's - 10 psi (0.69 bar)
1950P's - 50 psi (3.45 bar)
1950P-50 only - 90 psi (6.21 bar)
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