Dwyer GSTA-C-D-FC Carbon Monoxide Transmitter is an efficient and reliable device. With a drift of less than 5% per year in air and an accuracy of ±2% FS for CO and ±3% FS for NO2 at the time of calibration, it provides precise measurements. It operates with a current output of 10-35 VDC or a voltage output of 15-35 VDC/15-29 VAC. The response time is less than 45 seconds for CO and less than 25 seconds for NO2. The range is switch selectable between 200 or 500 PPM for CO and 10 PPM for NO2, making it versatile. The enclosure rating of IP64 ensures durability in various environments, and the field replaceable electrochemical sensor has a typical lifespan of 2 years. With an enclosure made of UV-resistant polycarbonate, it is suitable for outdoor use. The transmitter has a resolution of 1 PPM for CO and 0.1 PPM for NO2. It offers multiple output signals, including switch selectable 4-20 mA, 0-5 V @ 5 mA, 0-10 V @ 5 mA, 0 to 5 V/1 to 5 V, and 0 to 10 V/2 to 10 V. The coverage area is 5000 to 7500 sq ft, and zero and span adjustments can be made via pushbutton using the optional A-449 display. It is compatible with a wide humidity range of 15 to 90% RH constant and 0 to 99% RH intermittent. The storage temperature limits of 32 to 68°F promote sensor longevity. Calibration can be done via onboard push-buttons or using the optional A-449 display, and the span gas concentration is field selectable. With its exceptional features, the Dwyer GSTA-C-D-FC Carbon Monoxide Transmitter is a reliable choice for gas detection applications.