Since temperature affects the measuring accuracy of a pressure sensor, there always remains a little temperature error in the rated temperature range despite a wide range of compensation measures. This error is often expressed in the data sheets of manufacturers of pressure sensors as temperature coefficient (abbr. TC). pressure gauge describes a (linear) error, beginning with a reference point, which generally is room temperature.
Accordingly, the temperature error at room temperature is zero and increases with increasing difference of the temperature from room temperature with the specified coefficient in linear fashion (see figure). Basically, not merely the zero-point temperature coefficient (abbr. TC0), but also that of the span (TCC) must be considered individually. The zero-point error describes the effect of temperature on the zero signal. pressure gauge 10 bar of the span specifies the effect of temperature on the entire scale value. The individual temperature coefficients of zero point and of span are often specified as magnitudes, and therefore they could be either positive or negative.
If within an individual instrument the zero-point error has the same sign because the error of the span, these two temperature errors may accumulate in worst case. An average value for the average zero-point temperature coefficient of a pressure sensor is: 0.2 % / 10 K. Link to WIKA pressure sensors.