Vent Axia CO2 + Temp Room Sensor 433257

The Vent-Axia 433257 CO2 and temperature sensor is a wall-mounted unit designed for effective ventilation control in residential spaces, office environments, and educational settings. Compatible with various Sentinel systems — including most Sentinel Kinetic HR units, Totus HR systems, Sentinel D‑Box inline fans, and fans using eDemand voltage controllers or inverters — this sensor operates in proportional control mode. It continuously monitors carbon dioxide and temperature levels, adjusting the extraction rate based on the higher of the two readings.

The sensor uses an auto-calibrating NDIR absorption method for accurate CO2 detection, with a working range of 0 – 2000ppm. Temperature is measured using a thin-film platinum sensor for high precision, covering a range from 0°C to 50°C. Powered by 24V DC SELV, this compact unit measures 100 x 84 x 25 mm (H x W x D), making it ideal for discreet wall mounting.