Click image to view original
membrane, piston or bellows
up to 525 bars (7600 psi) Integrated electronics for signal processing and complex functions available Provide very precise, accurate set pointsVibration tests pass easily with our unique and robust designs Catalog valves can usually be adapted easily to meet special requirements Two Ranges of Pressure Switches Relative Pressure Switches Provide the relative pressure between two points. If both operating pressures are the same, the measuring element cannot move and no pressure will be indicated.Indicated when one pressure is higher or lower. Absolute Pressure Switches Operate at the same settings above zero pressure despite atmospheric pressure changes wher pressures are measured independently of the natural fluctuations in atmospheric pressure. The pressure of the media to be measured is compared against a reference pressure of absolute zero (absolute vacuum) in a sealed reference chamber. Three Primary Sensor Technologies Bellow Pressure Switches: Simple and LightUses axial deformation of a metallic bellow under the effect of pressure Use controlled by limits of bellows and vibration effects Use only for low and medium pressures Diaphragm Pressure Switches: Strength and AccuracyLegacy-proven pressure switch Diaphragm deforms under pressure and transmits the movement to a micro-switch via piston Deformation must remain small (0.1 to 0.2 mm) to stay within the elastic envelope of the diaphragm; movement must be amplified Strength comes from diaphragm movement being limited by stationary switch, enabling it towithstand higher pressures Piston Pressure Switches: A Simple Solution for High PressureIncludes piston with dynamic seals that moves under pressur Withstands very high pressures Performance limited by hysteresis created by the friction of piston seals; mainly at low temperatures