RH and temperature measurement for HVAC applications, the sensor with a 4÷20 mA output

For measuring temperature and humidity in e.g. ventilation units, in agriculture, etc. Combined sensors with analogue output can be used, typically with a 4 to 20 mA current loop. For an example of wiring the kHCPA converter of temperature and humidity (produced by Sensorika) see the following figure below.

Fig. 1. An example of wiring the kHCPA converter to the CP-1005 module

Notes:

1. The converter is equipped with active current outputs with a common minus terminal.