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Differential Pressure Switches

12 Products
Photohelic® Switch/Gages, Differential Pressure, 25 psig Max, Compact

The Photohelic® Switch/Gages offer precise differential pressure monitoring with easy-to-read analog displays. Compact and durable, they are suitable for various applications.

Adjustable Differential Pressure Switch – 0.08 to 20 inH2O (20 to 5000 Pa)

The Adjustable Differential Pressure Switch monitors pressure and vacuum with an easy-to-use knob. Ideal for HVAC applications, it features a compact design and durable materials.

Mini-Photohelic Differential Pressure Switch/Gage for Non-Corrosive Gases

The Mini-Photohelic Differential Pressure Switch/Gage measures non-corrosive gas pressures with dual switch points and LED indicators, perfect for fume hoods and clean rooms.

Industrial Differential Pressure Switch or Alarm

The PSW-180 series are compact, differential 5 A SPDT switches with the option of a relay or alarm output. They have NEMA-4X housings to withstand harsh environments.

OEM Mechanical Differential Pressure Switch

The PSW-845 series are economical, compact 250 mA SPDT differential pressure switches with a fixed deadband and excellent bypass characteristics.

Explosion-Proof Differential Pressure Switch, Weatherproof, 0.03-20 inH2O

The Series 1950 Explosion-Proof Differential Pressure Switch features a durable weatherproof housing, external set point adjustment, and is ideal for HVAC and process applications.

Digihelic® Differential Pressure Controller, 4-20 mA Output, 1.5% Accuracy

The Digihelic® Differential Pressure Controller combines a digital gauge, control relay, and transmitter in one device, offering versatile measurements with 1.5% accuracy.

General Purpose Industrial Differential Pressure Switch

The PSW-150 series are differential 15 A DPDT switches with a fixed deadband and UL listing for general purpose applications.

Differential Pressure Switches (Metal)

Differential Pressure Switches (Metal) monitor filter blockage and flow levels, providing reliable alarms and control for safe operation.

Industrial Control: Pressure Gauges, Flow Meters & Temp Controllers

Explore our Industrial Control series featuring reliable pressure gauges, flow meters, and temperature controllers for precise monitoring and control in various applications.

Differential Pressure Switches

Differential Pressure Switches act when the pressure difference between two ports reaches a set point. Products in this category span ACI, Omega Engineering, and Dwyer Instruments metal and plastic differential switches, industrial SPDT and DPDT switches, OEM mechanical switches, air-control switches, low differential switches, floating-contact designs, and adjustable inH2O or Pa ranges.

Applications include:

  • Filter blockage and airflow proof alarms
  • Duct static pressure and damper control
  • Fan, blower, and equipment status interlocks
  • Industrial differential pressure alarm points

Choose by setpoint range, repeatability, deadband, contact rating, enclosure, media compatibility, and whether the switch is used for alarm or control.

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