Spectrum 2655X CO2 Carbon Dioxide Sensor

Non-dispersive infrared (NDIR) technology measures Carbon Dioxide (CO2) levels in ppm, may be used as a handheld portable (internal, rechargeable battery) or wall-mounted for continous recording and data logging with a WatchDog Data Logger (one CO2 meter per logger). Includes 6-volt DC transformer. Range: 0 to 4000 ppm; . Accuracy: +/- 5% of reading or 50 ppm