The Honeywell TR50-5N Temperature, Humidity, and CO2 IAQ Configurable Sensor is a wall-mounted indoor air quality monitoring device designed for commercial HVAC and building automation systems. It measures temperature, relative humidity, carbon dioxide, particulate matter, and total volatile organic compounds, transmitting readings through BACnet, Modbus, or Sylk communication protoco... https://www.partshnc.com/tr50-5n-honeywell-temphumidco2-iaqconfsensor