Dwyer Series 1800 Differential Pressure Switch Low

Dwyer Series 1800 Low Differential Pressure Switch for general industrial service combines small size and low price with 2% repeatability for all but the most demanding applications. Setpoint adjustment inside the mounting stud permits mounting the switch on one side of a wall or panel with adjustment easily accessible on the opposite side. UL and CSA listed, and FM approved.

Dwyer Series 1800 Differential Pressure Switch Features

  • Compact size and repeatability provide a high-value switch for many industrial applications
  • Designed for panel and wall mounting to easily meet mounting requirements in most industrial settings
  • Pressure ranges from 0.07 in w.c. to 85 in w.c. make this switch suitable for a wide range of applications


  • Process applications
  • Mechanical equipment control

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Dwyer Series 1800 Specification

Service Air and non-combustible, compatible gases.
Wetted Materials Consult Factory.
Temperature Limits -30 to 180°F (-34 to 82.2°C). 1823-00, -20 to 180°F (-28.9 to 82.2°C).
Pressure Limits 10 psig (68.95 kPa) continuous, 25 psig (172.4 kPa) surge.
Switch Type Single-pole double-throw (SPDT).
Repeatability ±2%.
Electrical Rating 15 A @ 120-480 VAC, 60 Hz. Resistive 1/8 HP @ 125 VAC, 1/4 HP @ 250 VAC, 60 Hz. De-rate to 10 A for operation at high cycle rates.
Electrical Connections 3 screw type, common, normally open and normally closed.
Process Connections 1/8″ female NPT.
Mounting Orientation Diaphragm in vertical position. Consult factory for other position orientations.
Set Point Adjustment Screw type inside mounting spud.
Weight 1 lb, 5 oz (595 g).
Agency Approvals CE, CSA, FM, UL. NOTE: Optional (-EXPL) Explosion-proof Enclosure does not possess any agency approvals.

Download Data Sheet: Series 1800 Low Differential Pressure Switch

Ref: dwyer-inst.com