Pressure Switches DNS Type Hengesbach

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Pressure Switches Type DNS
Pressure Switches DNS Type

Pressure sensors

All pressure sensors have measuring bellows, some made of copper alloy, but the majority of high-quality stainless steel. The measuring bellows are exposed to a minimal load and perform only a small lifting movement. This results in a long service lifetime with only little drift switching point and high overload safety. Furthermore, the elongation of the bellows is limited by an internal stop so that the forces resulting from the over pressure cannot have impact on the switching device. The parts of the sensor in contact with the medium are welded together without filler metals. The sensors contain no seals. Copper bellows, which are used only for low pressure ranges, are soldered to the sensor housing. The sensor housing and all parts of the sensor in contact with the medium can also be made entirely from stainless steel 1.4571 (DNS series). Pressure switch with stainless steel sensor system, optional with plastic-coated housing.

Pressure connection

The pressure connection on all pressure switches is designed in accordance with DIN 16288 (pressure gauge connection G 1/2A). If wanted, the connection can also be made with a G 1/4 internal thread according to ISO 228 Part 1. Maximum screw-in depth on the G 1/4 internal thread is 9 mm.


Pressure switches of the DNS series are suitable for monitoring and controlling pressures in chemical plants, process
engineering and any situation where the pressure of aggressive liquids and gases must be monitored. All components of the sensor system are made from high-quality stainless steel (1.4571) and welded using the latest methods without filler metals. The pressure sensor is hermetically encapsulated and contains no sealing materials.

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