The differential pressure gauges are liquid, gaseous, aggressive, non-viscous and are not suitable crystallising, also in aggressive environments. Their task consists of measuring differential pressures or two different gauge pressures, such as in refrigeration engineering.

Moreover, a simultaneous measurement of steam pressure and the resulting steam temperature are possible. Two independent indicating Bourdon tube measuring systems work In a stable stainless steel case. Both pointers turn around the same axle and give + and – pressure separately.

The pointer of the low-pressure side has the form of a dial. On this dial the pressure difference can be read directly up to 50% of the measuring range. In addition, the two individual pressures are also directly readable. By high dynamic pressure loads and vibrations, a good damping are achieved via liquid filling.