Pressure switches

159 companies | 658 products
Piston pressure switch / OEM

These subminiature pressure...

Compact pressure switch / OEM / hydraulic

These compact pressure...

Piston pressure switch / membrane

These versatile general purpose pressure...

Variable pressure switch

Rexroth pressure switches, Series PM1 are useful for relative pressure...

Compact pressure switch

The Ceraphant T PTP31 is a pressure switch...

Membrane pressure switch

The Ceraphant T PTP35 by ENDRESS+HAUSER is designed...

With digital display / high-precision

The Series ISE30 high precision...

Inflatable boat pressure switch

SMC created IS3000,...

Centralized lubrication unit pressure switch

Typically, pressure switches can be used...

Digital pressure switch / for centralized lubrication unit

The analogue pressure gauge visually checks the...

Skillair® pressure switches represent...

Differential pressure switch

The digital pressure switch is provided...

Gas pressure switch

Diaphragm pressure switches with micro switch (silicone-free)...

Membrane pressure switch

Diaphragm pressure controls with micro control...

Membrane pressure switch

These diaphragm switches are fitted with a silicone free micro switch...

Membrane pressure switch

The Elster DL..E pressure switches for air series...

RT switches are often utilized in both the marine...

Steam pressure switch

A number of control options are available...

Heavy-duty pressure switch

With this KPS series, extraordinary consideration has...

Heavy-duty pressure switch

The CAS line of pressure switches features a low...

How to choose this product

pressure-switch

A pressure switch controls and adjusts a hydraulic or pneumatic system. It reacts to a pressure threshold or setpoint. Activating an on-off output, such as a dry contact, directly governs a mechanism which reestablishes the desired pressure.

Applications

These devices are found in process control, for compressor or pump operation, in chemistry, automobiles, agribusiness, the energy industry, hydraulics, construction, refrigeration units and in oil and natural gas installations.

Technologies

Relative or absolute pressure gas, vapor or liquid switches have a single input. Differential models have two inputs. Such switches can be mechanical or electronic.

Mechanical switches use a diaphragm, a piston or a Bourdon tube. The output contact may be normally open (NO) or normally closed (NC). A calibration screw is used to adjust the setpoint. Hysteresis parameters are set by the manufacturer or are adjustable.

Electronic switches also act as pressure transmitters. They use strain gauge, capacitive, inductive or piezoelectric measurement methods. Setpoints are programmable; readings are transmitted by two-wire, four-20 mA current loop or a three-wire 0-10 V arrangement. They are temperature-compensated and more precise.

How to choose

Choice will depend on the switch's working pressure and adjustment ranges, hysteresis, ability to withstand excess pressure and degree of protection.

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