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Dwyer ADPS Differential Pressure Switch

Dwyer ADPS Adjustable Differential Pressure Switch is designed for pressure, vacuum, and differential pressures. Typically used in ventilation applications, Dwyer ADPS can be adjusted without a reference gauge. The dual scaled adjustment knob shows values in inches water column and pascals. Multiple ranges are available down to 0.08 in w.c. (20 Pa) and 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 are also available to meet UL508 and are constructed of plenum rated plastics. The compact size, adjustment knob and low cost make the Dwyer ADPS switch the perfect choice for HVAC applications.  For a metal clad, more industrial design pressure switch consider the Dwyer 1900 Series Differential Pressure Switch.


Dwyer ADPS Adjustable Differential Pressure Switch Specifications

  • Service: For Air and non-combustible, compatible gases.
  • Wetted Materials:
    • ADPS: Diaphragm material: Silicone; Housing material: POM; Switch body: PA 6.6; Cover: Polystyrene;
    • EDPS: Diaphragm material: Silicone; Housing material: Switch body: PA 6.6; Cover: Polystyrene; Materials UL 94 V-0 rated.
  • Temperature Limits: Process and ambient temperature from -4 to 185°F (-20 to 85°C).  Storage:-40 to 185°F (-40 to 85°C).
  • Pressure Limits: Max. Operating Pressure: 40″ w.c. (10 kPa) for all pressure ranges.
  • Switch Type: Single-pole double-throw (SPDT).
    • Electrical Rating: Max. 1.5 A res./0.4 A ind./250 VAC, 50/60 Hz; Max. switching rate: 6 cycles/min.
  • Electrical Connections: Push-on screw terminals.
  • M20x1.5 Cable entry with cable strain relief or optional 1/2″ NPT connection.
  • Process Connections:5/16″ (7.94 mm) outside diameter tubing, 1/4″ (6.0 mm) inside diameter tubing.
  • Enclosure Rating: NEMA 3 (IP54).
  • Mounting Orientation: Vertically, with pressure connections pointing downwards.
  • Mechanical Working Life: Over 106 switching operations.
  • Weight:4.4 oz (125 g).
  • Agency Approvals: CE, ETL approved to UL508 and CSA C22.2#14 (EDPS only).



Dwyer ADPS Pressure Switch Product Video



Fluidic are a recognised partner of Dwyer Instruments for Scotland and the North of England.  Our instrumentation engineers are product trained and are able to help with instrument selection within the full Dwyer Instrument supply scope. Please call either office for more information (Glasgow 0141 641 5920,  Warrington 01925 572401).


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