Dwyer GSTA-N-D is a Nitrogen Dioxide Transmitter with a drift of less than 5% and an accuracy of ±2% FS for CO and ±3% FS for NO2. It has a power requirement of 10-35 VDC, 15-35 VDC, 15-29 VAC and a response time of less than 45s for CO and less than 25s for NO2. The transmitter has a range of 200 PPM for CO and 500 PPM for CO, as well as an enclosure rating of IP64. It features a field-replaceable electrochemical sensor and has a humidity range of 15 to 90% RH constant and 0 to 99% RH intermittent. The housing is made of UV resistant glass filled polycarbonate and the electrical connections are via a removable terminal block. The output signal is switch selectable 4-20 mA, 0-5 V @ 5 mA, or 0 to 10 V@ 5 mA, with additional switch selectable options. It has a coverage area of 5000 to 7500 sq ft and allows for zero and span adjustments via pushbutton. The storage temperature limits are 32 to 68°F and it can be calibrated via onboard push-buttons or using optional A-449 display. This gas transmitter is suitable for carbon monoxide and nitrogen dioxide monitoring.