Ifm electronic supplies compact pressure switch of pk series. It has very simple configuration but provides long-term stability with its stainless steel measuring cell. This pressure switch has unique high-pressure peak resistance and excellent resistance against aggressive media. It has radial setting rings with sca, which permits optimum reading. By these reading the customers can adjust the set point and reset point quickly and correctly. Unauthorised manipulation is not allowed to remove the possibility of mechanical locking. The users can get the feed back by two clearly visible leds as switching status and operating status indication. It can be applied almost all industrial purposes due to its strong structure. It has also a wide application in gas pressures up to 400 bar and air conditioning and refrigerating technology.