The temperature indicator can be connected to up to four external temperature and humidity modules. The temperature measurement range at the sensors by the thermo hygrometer is 32.0 ... 122.0 °F and the humidity measuring range is 0.0 ... 99.9% RH. The power supply itself is effected in the thermo hygrometer via a power supply of 110 ... 220V AC. The integrated sensor can supply the connected sensors in the thermo hygrometer 12 or 24V DC supply.

As soon as the sensors are connected, they are automatically recognized by the temperature indicator. The communication between the sensor modules and the thermo hygrometer takes place via an analog 4… 20-mA signal. If several sensors are connected, the average reading of all sensors is displayed on the thermo hygrometer. The thermo hygrometer is used, for example, in event halls, restaurants or in public buildings to monitor ambient conditions.

Both the temperature indicator and the sensor module are mounted on a wall. If necessary, the thermo hygrometer can be mounted on a monitor bracket with the mounting dimensions 75 x 75 mm. This allows the thermo hygrometer to be ideally aligned. The thermo hygrometer can optionally be equipped with an ISO calibration certificate.