Humidity sensor to control speed of either input or extract airflow

To monitor humidity in rooms and switch extract fans, alarms, humidifiers or de-humidifiers etc in the event of high or low humidity level.
Any combination of humidifying or dehumidifying is possible.
Volt free contacts Max. air velocity 15 m/s
Terminals 0.5-2.5mm² Accuracy ± 3%RH
Media Temp. 0-60°C 0-100% RH non-condensing.
Sensing element - Specially treated plastic strands which do not require regeneration.
If humidity level exceeds  85%RH, a low voltage supply is recommended.
Not suitable for aggressive dirty or dusty media.