Pressure monitoring cylinders, hydraulically
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Pressure monitoring cylinders


Pressure monitoring cylinder
for manifold connection with O-ring


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 pressure monitoring cylinders are 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 pneumatic/electric booster relay. The particular advantage of this pressure monitoring cylinder lies in the fact, that after just minimal pressure loss (max. 15 %) the piston returns to its starting position, so generating a signal that can eg. stop the production process.


Special features:
  • adjustable preload

  • evaluable mechanical signal

  • signal already at low pressure loss

  • suitable for static clamping systems

  • increases the functional reliability of clamping systems


Installation instructions:

Dismount the springs which are not necessary for the test pressure so that only the springs according to the table “Setting ranges” remain in the cylinder. Fine adjustments are made on the front adjustment nut. Adjust the signal element that is to be operated by the DUZ in extracted position of the piston. Assemble all supplied fastening elements. Thus, the switching point is reversible. When using the drilled channels in the cylinder with manifold connection, the  connection bore must show a maximum diameter of 6 mm.

Setting ranges:

Spring selection:

spring 1
spring 2
spring 3
springs 1 + 2
springs 1 + 3
springs 2 + 3
springs 1 + 2 + 3
  15 -   80 bar
  80 - 180 bar
140 - 200 bar
  90 - 260 bar
160 - 300 bar
210 - 400 bar
250 - 500 bar




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Founded 1998, HYDROKOMP designs, manufactures and distributes hydraulic components, coupling systems and clamping technology for mechanical engineering, fixture construction, tooling and many other branches of industry also for different operating conditions.

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