The HELIO Standalone Gas Detector and HELIO 3 Channel Gas Detector protect people from gas hazards associated with underground carparks and tunnel. The user can network up to 200 gas sensors, control local alarms via the 2 x volt free alarm contacts and 4-20 mA output supplied with every HELIO gas detector. Interface with a HELIO Control Panel with the capability of displaying the area floor plan and historical trend to more accurately pin point the gas alarm location

Gas Hazards include Carbon Monoxide (CO) and Nitrogen Dioxide (NO2) typically.