1831 Series

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Product Bar End

1831 Series

Differential Pressure Switches 1831 Series

Differential Pressure Switches


The Dwyer 1831 Series differential pressure switches are available with a DPDT switch and manual reset. The 1831 combines small size with 4% set point repeatability. Absolutely no power is required to operate the DPDT switch. Set point adjustment on the switch is easily accessible for modifying the set point. The 1831 Series DPDT low differential pressure switches with manual reset eliminate common problems associated with typical high duct static cutout installations. Since the 1831 requires absolutely no power to drive its outputs, a separate power loop and its associated additional wiring and conduit is alleviated, reducing material and labor installation costs. Both control contacts of the 1831 Series activate at the same time. The potential of the lead switch shutting down the fan preventing the lag switch from sending an alarming signal to the DDC is no longer a probable system liability. Potential costly maintenance calls are diminished. Unlike typical switches that posses only a single conduit entry for both control loops, the 1831 Series provides two conduit connections simplifying wiring while eliminating additional conduit tees. The 1831 Series' specifications and features make it the superior choice for high duct static cutout applications.


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QtyModelDescriptionIn StockList PriceInternet Price
1831-1-RA-S DIFF PRESS SW, ADJUST, 2.50-9.00" WCIn Stock364.00203.84
1831-2-RA-S DIFF PRESS SW, ADJUST, 7.50-23.00" WCINFO364.00203.84


No accessories found
  • No power required
  • DPDT switch with manual reset
  • Two conduit connections for easy wiring
  • Adjustable setpoint
  • L Bracket mounting

Supply Voltage: Not required

Contact Type : 2-SPDT, Actuates on & #916;P increase

 : Operates simultaniously within 1ms

Contact Rating :4A Resistive @ 120-250 VAC

Setpoint (SP): Adjustable range w/slotted screw in stub

1831-1: 2.5″ to 9″ WC

1831-2 :7.5″ to 23″WC

Differential : None; Manual reset

Repeatability :±4% max

Reset Manua:l Reset

Visual Indication Switch: Left ″Not tripped″, Switch right ″Tripped″

Sensor Type Diaphragm: (Vertically mounted)

Operating Pressure Range: 0 to 1.2″ WC (See ordering)

Overpressure (Burst): 25 PSIG (172kPa)

Max Operating Pressure (Proof) :10 PSIG (69kPa)

Operating Temperature: -30°to 180℉ (-34° to 82℃)

Operating Humidity: <80% Non-condensing

Wetted Parts :Not Specified

Media Compatibility: Inert dry air

Process Connection :Two (Hi & LO), 1/8″ FNPT

Wiring Terminations: 6 screws, 14 to 30 AWG

Mounting Included: L-bracket or 1/8″ FNPT process connections

Enclosure Rating: Steel, NEMA 1

Dimensions: 4.1″ w x 4.1″h x 4.4″d, (10.3 x 10.3 x 11.1 cm)

Weight: 1.3 lb (0.6 kg)

Approvals : CE

Warranty : 1 year