... Up to 3xanalog linear outputs Modbus RS485 Monitoring parametersCO2Air Quality (VOC)TemperatureRelative humiditySensing elementNon-Dispersive Infrared Detector (NDIR) ... 1.Designed for real time detecting carbon dioxide, air quality, temperature or relative humidity in air ducts.2. ... selectable8.LCD display real-time measurements of CO2, air quality (VOC), temperature and relative humidity.9.Simple and ...