The PDM PRO CO2 is a single gas sustainable gas monitor designed to detect Carbon Dioxide (CO2) in the ambient environment. The PDM PRO CO2 is sustainable, hence its battery and sensor can be replaced. When the device is turned on, the PDM PRO CO2 continuously monitors ambient air for the presence of CO2 and alerts the user to potentially unsafe exposure with LED, vibrating, and audible alarms. After use, the instrument can be turned off. With an excellent battery life of 14 days and a recharge time of only 100 minutes, the PDM PRO CO2 offers great versatility for any user.