Series DX Wet/Wet Differential Pressure Switch

Wet/Wet Differential Pressure Switch
NEMA 4X Enclosure, Low Differential Set Points

NEMA 4X Enclosure, Low Differential Set Points

The SERIES DX 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). Weatherproof, UL type 4X, enclosure for dust laden, outdoor, or wash-down installation environments. Externally adjustable set point, integral mounting flange and a removable electrical terminal block for quick and easy installation.

Product Applications

  • Indicating filter differential pressure. For example initiating water filter backwash as the filter becomes clogged on increasing differential pressure.
  • Proof of flow indicator monitoring differential pressure from a sensing device. For example sensing the pressure across an orifice plate to prove water flow.
  • Proving flow through a pump by sensing the pressure across the pump to make sure the pump does not run dry.
  • Proving flow through a chiller. Often called evaporator water pressure drop.
  • Proving flow through a heat pump or AC unit. Often called a condenser water lock-out switch.
More Information
Model Chart
EXAMPLEDXW111531STSeries DXW-11-153-1-ST, Wet/Wet Differential Pressure Switch, brass & fluoroelastomer, NEMA 4X, 1/4" NPT, SPDT, range 2.5-10 psi, with a stainless steel tag.
SERIESDX      DX Wet/Wet Differential Pressure Switch
WETTED MATERIAL  1    Brass/Fluoroelastomer
RANGE     1
 2.5-10 psi
10-25 psi
25-50 psi
50-75 psi
Preset Set Point
Stainless Steel Tag
Service: Compatible gases and liquids.
Wetted Materials: Connection: Brass; Diaphragm: Fluoroelastomer.
Temperature Limits: 30 to 140°F (-1 to 60°C).
Pressure Limits: 200 psig (13.8 bar). Continuous single side only pressure should not exceed 1.25 x full differential range.
Enclosure Rating: Weatherproof UL type 4X (IP65).
Repeatability: ±2% of full range.
Switch Type: SPDT snap switch.
Electrical Rating: 5 A @ 125/250 VAC, 5 A res. @ 30 VDC.
Electrical Connection: Removable terminal block.
Conduit Connection: 0.871" diameter hole for 1/2" conduit fitting.
Process Connection: 1/4" NPT female.
Mounting Orientation: Ports on horizontal plane, ±10°.
Set Point Adjustment: External screw.
Housing Materials: Body: Aluminum; Housing: Polycarbonate; Cover: 300 SS.
Vibration and Shock: Set point repeats after 2.5 Gs, 5 to 500 Hz. Set point repeats after a 15 Gs, 10 millisecond duration.
Altitude Limit: 6560 ft (2000 m).
Humidity Limit: 80% (non-condensing).
Pollution Degree: 2.
Environment: Intended for indoor and outdoor use.
Weight: 1 lb 3 oz (0.54 kg).
Agency Approvals: CE, cULus.
  • Differential pressure switch that is suitable for most gas and water-based applications allows multiple uses in the most sophisticated designs
  • Weatherproof housing provides protection in the harsh, wet or dirty environments insuring switch’s long-service life
  • Removable terminal block reduces installation time