MAMAC Systems HU-921-1-VDC-8 Humidity Transducer is a sensing component designed to measure relative humidity and provide an electrical signal for HVAC control systems. It works by detecting changes in humidity levels and converting them into a proportional output signal, allowing connected controllers to monitor and regulate indoor moisture conditions. Designed for use with compatibl... https://www.partshnc.com/hu-921-1-vdc-8-mamac-systems-humidity-xdcr-vdc-10kohm-ntc