Electro-Hydraulic pressure switch is a component whose job is to send information about the achieved predetermined pressure in the hydraulic or lubricating installation. It belongs to the group of piston compression switches, its housing contains piston which seals, thanks to its fine precision processing and preparation. This solution has allowed an extremely small differential travel of the device and the outstanding work both with low viscosity oils and with viscous oil and lubrication grease. Its robust housing and compact design enable to perform in difficult conditions such as in the steel mills, cement plants, and open pit mines. The activating pressure is continuously adjusted and we deliver it on a minimal pressure, unless it is previously arranged to be otherwise.