This version of the pressure transmitter series HDA 8700 has been specially developed for use in safety circuits / safety functions as part of the functional safety of machinery and equipment up to SIL 2 (IEC 61508) or PL d (ISO 13849). During normal operation the pressure transmitter HDA 8700 generates an output signal proportional to the pressure. In the background, the pressure transmitter performs cyclical diagnostic tests to detect internal errors. If an instrument error is detected, the pressure transmitter HDA 8700 supplies an output signal < 3 mA which is recognised by the user as an unacceptable discrepancy. This means that the pressure transmitter HDA 8700 achieves Performance Level d in the Safety category (based on a Category 2 of the architecture) and SIL 2. As a result, the pressure transmitter can be recommended for use in  applications where safety is critical. The main fields of application are in mobile and stationary safety-oriented systems such as load torque displays or load torque limitation in loading cranes or working platforms.