CO-AF Carbon Monoxide Sensor (CO Sensor) Description Alphasense Carbon Monoxide gas sensors operate using proven fuel cell technology. CO-AF Carbon Monoxide Sensor (CO Sensor) sizes: 20mm diameter, the industry standard size for portable gas detectors The Alphasense family of CO sensors have proven themselves in the field with long term stability and reliable operation, well beyond the two-year warranty, using our patented electrode technology. CO-AF Carbon Monoxide Sensor (CO Sensor) Specifications * 20mm diameter * Sensitivity: 55 to 90nA/ppm in 400ppm CO * Response time t90: < 25s from zero to 400ppm CO * Resolution: < 0.5 RMS noise (ppm equivalent) * Range: 5,000ppm CO limit of performance warranty * Temperature range: -30 to 50'C * Pressure range: 80 to 120kPa * Humidity range: 15 to 90% rh continuous Matched Transmitter board for CO-AF CO Sensor 4-20 mA Digital Transmitter Board * Factory calibration, custom-set for immediate use * Digital zero, sensitivity and temperature compensation * Digital and 4-20mA output * Biased or unbiased operation * Calibration and range change