Siemens Building Technology QFM2171 Humidity & Temperature Sensor 4-20 mA

Siemens QFM2171 Duct Sensor is a high performance that can accurately measure humidity in HVAC systems. This sensor has an accuracy and an operating range of 0 to 95% RH for accurate environmental monitoring. It works by converting the relative humidity measurements into a 4–20 mA current signal that can be integrated into real time management and monitoring into different HVAC control systems. Made of sturdy polymer, it is designed to resist temperatures between -40 and 158°F for use inside or outside of the house.This sensor to keep commercial and industrial HVAC systems' humidity levels at optimal levels which contributes to better air quality, less energy usage, and a better overall system performance.