The Vent-Axia Ecotronic Humidity Sensor is a solid-state on/off controller designed to automatically activate ventilation equipment based on relative humidity levels. The adjustable set point allows operation within a range of 65% to 90% RH, providing flexible control for varying environmental conditions. A built-in pullcord offers manual override, signaled by an indicator lamp for clear visibility. The unit also features a changeover switch, enabling users to select between low and high-speed fan operation. It can be connected directly to a controller’s ‘Auto’ mode terminals for automated system integration. Suitable for ambient temperatures between 0°C and +40°C, the compact unit measures 87 x 87 x 33mm (H x W x D).