Controls can be supplied with varying degrees of protection, and with various approvals for use in Explosionproof/Flameproof/Hazardous areas. They can also be manufactured with a variety of Electrical and Pneumatic Outputs.

For more detailed information see the Data sheet below.


This low cost, rugged and versatile control has been designed with dependability in mind. Gravity castings are used to eliminate the ‘working’ of the control housing, with subsequent shifting of the set point, commonly encountered in controls manufactured from sheet metal.

The Series 4000 switches cover the range of 0.14 to 21 Barg in a group of four basic models.