Check the listing for details. Vaisala GMW80 Series CO2 Temperature Humidity Wall Transmitter Sensor New. Condition: New – Open box. Listed at 100.00 USD. Vaisala GMW80 Series Indoor Air Quality Wall Transmitter New open-box Vaisala GMW80 Series wall-mounted transmitter. This unit has never been installed and still has the protective film on the front cover. Includes the mounting base and installation instructions. The GMW80 Series is designed for commercial HVAC and building automation applications. Depending on the model, units in this series measure CO₂, temperature, and humidity for demand-controlled ventilation and indoor air quality monitoring. Included: * Vaisala GMW80 Series wall transmitter * Mounting base * Installation instructions * Original packing Please review all photos carefully to verify compatibility and the exact configuration before purchasing.