DX Series

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DX Series

Differential Pressure Switches DX Series

Differential Pressure Switches


The Dwyer DX Series is a differential pressure switch that makes a contact output based on the differential between two pressure sources. Wetted materials of brass and flouroelastomer are suitable for use with most gases and water based solutions. The switch can be used for low differential pressure indication with set point on a decrease of pressure as low as 1 psid (0.07 bar). Differential set point ranges are available from 2.5 to 75 psid (0.17 to 5.17 bar) on increasing differential pressure and 1.0 to 67 psid (0.07 to 4.62 bar) on decreasing differential pressure. Unit features a high static pressure rating of 200 psig (13.8 bar) for higher static pressure applications. Standard is a weatherproof, UL type 4X, enclosure for dust laden, outdoor, or wash-down installation environments. DX Series incorporates an externally adjustable set point, integral mounting flange and a removable electrical terminal block for quick and easy installation. The DX uses opposing diaphragms to sense the high and low pressure with a pivot mechanism that transfers the difference of the two pressures to the SPDT switch.


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QtyModelDescriptionIn StockList PriceInternet Price
DXW-11-153-1 DIFF PRESS SW, ADJUST, 2.5-10 PSIIn Stock279.00156.24
DXW-11-153-2 DIFF PRESS SW, ADJUST, 10-25 PSIIn Stock279.00156.24
DXW-11-153-3 DIFF PRESS SW, ADJUST, 25-50 PSIIn Stock279.00156.24
DXW-11-153-4 DIFF PRESS SW, ADJUST, 50-75 PSIINFO279.00156.24


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  • Weatherproof UL type 4X (IP65) enclosure
  • External adjustable setpoint
  • Removeable terminal block for easy installation

Contact Rating:5 A @ 125/250 VAC, 5 A res. @ 30 VDC

Contact Type:SPDT snap switch

Repeatability:±2% of full range

Operating Pressure:200 psig (13.8 bar). Continuous single side only pressure should not exceed 1.25 x full differential range

Operating Temperature:30° to 140℉ (-1° to 60℃)

Operating Humidity:80%, non-condensing

Enclosure Rating:Weatherproof UL type 4X (IP65)

Process Connection:1/4″ FNPT

Electrical Connection:Removable terminal block

Setpoint Adjustment:External screw

Vibration and Shock:Set point repeats after 2.5 Gs, 5 to 500 Hz. Set point repeats after a 15 Gs, 10 ms duration

Pollution Degree:2

Environment: Intended for indoor and outdoor use

Altitude Limits:6560 ft (2000 m)

Conduit Connection:0.871″ diameter hole for 1/2″ conduit fitting

Housing Material:Body: Aluminum; Housing: Polycarbonate; Cover: 300 stainless steel

Media Compatibility:Compatible gases and liquids

Mounting Orientation:Ports on horizontal plane, ±10°

Wetted Materials:Connection: Brass; Diaphragm: Fluoroelastomer

Weight: 1.2 lb (0.5 Kg)

Approvals: CE, UL File #E38121

Warranty: 1 year