LTC Diaphragm

An LTC diaphragm (Low Temperature Coefficient) is a stainless steel diaphragm for diaphragm seals. Due to its special design, it has two stable positions between which it can be deflected almost reactionless.

Diaphragm seals are partitions in pressure measuring instruments which prevent the measured medium from entering the measuring system. To transfer the process pressure „caught“ by the diaphragm to the measurement element, a pressure transmission fluid is used. The LTC (Low Temperature Coefficient) diaphragm compensates this temperature-dependent volume expansion of the pressure transmission fluid with a stainless-steel diaphragm. Using a special manufacturing process the mechanically robust stainless-steel diaphragm with a thickness of at least 0.1 millimetres is put into a position between two zero positions and operates in this range with almost no deflection. This allows the diaphragm to absorb volume changes to the fluid due to the influence of temperature so that these fluctuations have practically no effect. Compared to conventional sinusoidal diaphragms, an LTC diaphragm can deliver up to 70 per cent greater measurement accuracy.