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Series 1950 Explosion-proof Differential Pressure Switch

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Series 1950 Explosion-Proof Differential Pressure Switch combines the best features of the popular Dwyer® Series 1900 Pressure Switch with an integral explosion-proof and weatherproof 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 (IP54). Weatherproof features include a drain plug and O-ring seal in cover. Electrical connections are easily made by removing 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 in w.c. (0.0075 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 switches with separate enclosures. CAUTION: For use only with air or compatible gases. Applications with hazardous atmospheres and a single positive pressure may require special venting. Product Applications HVAC applicationsProcess applicationsAll-weather applications

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Model	Description
1950-00-2F	Differential pressure switch, range .07-.15" w.c., approx. deadband @ min. set point 0.04, approx. deadband @ max. set point 0.05.
1950-02-2S	Differential pressure switch, range .03-.10" w.c., approx. deadband @ min. set point 0.025, approx. deadband @ max. set point 0.05.
1950-0-2F	Differential pressure switch, range .15-.50" w.c., approx. deadband @ min. set point 0.10, approx. deadband @ max. set point 0.15.
1950-10-2F	Differential pressure switch, range 3-11" w.c., approx. deadband @ min. set point 0.40, approx. deadband @ max. set point 0.50.
1950-1-2F	Differential pressure switch, range .4-1.6" w.c., approx. deadband @ min. set point 0.15, approx. deadband @ max. set point 0.20.
1950-20-2F	Differential pressure switch, range 4-20" w.c., approx. deadband @ min. set point 0.40, approx. deadband @ max. set point 0.60.
1950-5-2F	Differential pressure switch, range 1.4-5.5" w.c., approx. deadband @ min. set point 0.30, approx. deadband @ max. set point 0.40.

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P/N#: AT-ADPS

1127

Series AT-ADPS ATEX/IECEX Approved Differential Pressure Switch

The Series AT-ADPS ATEX/IECEx Approved Differential Pressure Switch is designed for pressure, vacuum, and differential pressure applications in hazardous areas. The dual scaled adjustment knob in inches water column and Pascals allows changes to the switching pressure to be made without a pressure gage. The switch is available with settings from 0.08 in w.c. (20 Pa) up to 20 in w.c. (5000 Pa). The silicone diaphragm makes this series ideal for use with air and other noncombustible gases. Flame-proof enclosures are available in aluminum and can include a glass window for viewing set point status on the adjustment knob.

P/N#: ADPS/EDPS

1196

Series ADPS/EDPS Differential Pressure Switch

The Series ADPS/EDPS Adjustable Differential Pressure Switch is designed for pressure, vacuum, and differential pressures. The dual scaled adjustment knob in inches water column and pascals allows changes to the switching pressure to be made without a pressure gage. The ADPS/EDPS is available with settings from 0.08 in w.c. (20 Pa) up to 20 in w.c. (5000 Pa). The silicone diaphragm and PA 6.6 body make the series ADPS ideal for use with air and other noncombustible gases. Series EDPS models meet UL508 and are constructed of plenum rated plastics. The compact size, adjustment knob and low cost make the ADPS/EDPS the perfect choice for HVAC applications.