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Dwyer 1950 Series Explosion-Proof Ultra Micro Differential Pressure Switches
Explosion-proof ultra-micro differential pressure switch
Explosion-proof ultra-micro differential pressure switch
Small, low cost, explosion proof and weatherproof
The Model 1950 Explosion Proof Differential Pressure Switch combines the best features of the Dwyer Universal 1900 Series. With explosion-proof and all-weather protection, its application value is higher. It has CE, UL, CSA, FM approvals, 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) . Weatherproof cover with drain plug and O-ring seal. Front cover is easy to remove to complete electrical connections. The set point adjustment on the outside of the protective housing is very convenient to use. Twelve models are available from 0.03 to 220˝ inches of water (7.5 to 5 kPa) and from .5 to 50 psi (0.035 to 3.5 bar). It is extremely compact and lightweight - half the weight and volume of other individually guarded explosion-proof switches.
NOTE: For use only with air or compatible gases. Special ventilation is required for use in hazardous environments and single positive pressure conditions.
Technical indicators
Medium: Air and non-flammable, compatible gas
Material: Please consult the manufacturer
Temperature Range: For -40 to 140°F (-40 to 60°C), 0 to 140°F (-17.8 to 60°C) for 1950P-8, 15, 25 and 50. -30 to 130°F (-34.4 to 54.4°C) for 1950-02.
Pressure Range: Continuous: 1950's - 45˝ w.c. (0.11 bar); 1950P's - 35 psi (2.41 bar); 1950P-50 only -70 psi (4.83 bar)
Shock Pressure: 1950's - 10 psi (0.69 bar) 1950P's - 50 psi (3.45 bar) 1950P-50 only - 90 psi (6.21 bar)
Protection index: IP54, NEMA 3, 7 and 9
Switch Type: Single Pole Double Throw (SPDT)
Electrical Specifications: 15 A @, 125, 250, 480 VAC, 60Hz. Resistive 1/8 HP @ 125 VAC, 1/4 HP @250 VAC, 60 Hz
Electrical connection: 3 screw terminals, normal, normally open, normally closed
Connection: 1/8˝ NPT female thread
Installation positioning: the diaphragm is used in the vertical direction, please consult the manufacturer for other positioning
Set Point Adjustment: Adjustment screw on top of housing
Weight: 3.25 Ib (1.5 kg), Model 1950-02, 4.4 lb (2 kg)
Agency Approvals: CE, UL, CSA, FM