1/2 2/2 Gas Detectors Alpa EcoWent Device discontinued Product code: PW-022 Alpa EcoWent Gas Sensor is a device used to detect the concentration of carbon monoxide (CO) and nitrogen dioxide (NO2) in public buildings, especially garages and underground car parks. See full description Product description Device withdrawn from production Alpa EcoWent Gas Sensor is a device used to detect the concentration of carbon monoxide (CO) and nitrogen dioxide (NO2) in public buildings, especially garages and underground car parks. Related products Control Unit ModulesAlpa MOD LED1Control Unit ModulesAlpa MOD LED 8Control UnitsEcoAlpa