Pressure monitoring cylinders, hydr./mech., ND 4

HYDROKOMP’s Pressure monitoring cylinders convert a hydraulic 

signal (test pressure/pressure loss) into a mechanical signal that 

can be evaluated by means of electrical or pneumatic switch units.

They are used predominantly in hydraulic systems that are not 

connected to a pressure generator, e.g. fixed clamping systems. 

The cylinder is equipped with three compression springs which can 

measure any pressure between 15 and 500 bar depending on their 

combination and adjustable pretensioning. When the preset pressure 

is reached the piston moves through a stroke of 2.5 mm. This can be 

detected by means of a limit switch, an inductive proximity switch or 

a pneumatic/electric booster relay.

The particular advantage of this pressure monitoring cylinder is due 

to the fact that after just minimal pressure loss (max. 15 %) the piston 

returns to its starting position, so generating a signal that can for 

example stop the machining process.