Sensaphone Indoor Air Quality Sensor FGD-0066 Monitor pollution levels from 0 100% with any Sensaphone that accepts a 4-20ma input signal. Popular applications include schoolrooms, office buildings, and parking garages. Air Quality sensor uses a tin dioxide semiconductor sensor to detect oxidizable gases gaseous organic materials are the components of indoor air pollutants. Air contaminants include cigarette smoke, cooking exhaust, automobile exhaust, solvents and many others. The sensor will require a 24VDC power supply such as the FGD-0053 not included to operate . Note FGD sensors, accessories, etc. are not compatible with IMS-4000 systems by Sensaphone. Sensaphone Air Quality Sensor Specifications Measurement Solid State TGS VOC Sensor Sample Method Flow Through Operating Temperature Range 32 degrees 122 degreesF Housing White Plastic Dimensions 2.8 x 4.7 x 1.25 Compatibility 1400 400, 800, 1400, 1800, 2000, StationSitter Express II This item ships from a separate warehouse and may require extra time for delivery.