Abstract: A heating, ventilating and air conditioning (HVAC) sensor device includes a control signal input for receiving, from an HVAC controller, a control signal for controlling a HVAC actuator, a control signal output for transmitting a control signal to the HVAC actuator; and an electronic circuit, which receives a sensor signal indicative of condensation and/or indicative of relative humidity; and passes through the control signal to the control signal output in response to the sensor signal indicative of condensation and/or indicative of relative humidity being within defined ranges, or overwrites the control signal received at the control signal input with a control reference value and outputs the overwritten control signal at the control signal output in response to the sensor signal being outside the defined ranges. The control reference value causes the HVAC actuator to move an actuated part to a safety position which reduces and/or prevents formation of condensation.

Abstract: An HVAC sensor device (50) comprising a control signal input (54in) for receiving control signal(s) for controlling one or more HVAC actuator(s) (10) from an HVAC controller (20); a control signal output (54out) for transmitting control signal(s) for controlling the HVAC actuator(s) (10) and an electronic circuit (56). The electronic circuit (56) is configured to: receive a sensor signal(s) indicative of condensation and/or relative humidity in the HVAC system; pass through the control signal(s) received at the control signal input (54in) to the control signal output (54out) if the sensor signal(s) indicative of condensation and/or relative humidity is within a defined range(s); and overwrite the control signal(s) received at the control signal input (54in) with a control reference value (V1) and output the overwritten control signal(s) at the control signal output (54out) if the sensor signal(s) indicative of condensation and/or relative humidity is outside the defined range.