Dwyer GSTC-N-D is a Nitrogen Dioxide Transmitter with a drift of <5%. It has a temperature range of -4 to 122°F (-20 to 50°C) and an accuracy of CO: ±2% FS, NO2: ±3% FS. It requires a power supply of 10-36 VDC, 21.6-33 VAC, and consumes 5.7 mA at 24 VDC. It has a fast response time of <45s to 90% CO and <25s to 90% NO2. It has a range of CO: 0-500 PPM, NO2: 10 PPM, and an enclosure rating of IP64. The sensor is field-replaceable electrochemical, and it has an enclosure made of UV-resistant glass-filled polycarbonate. It has a resolution of CO: 1 PPM, NO2: 0.1 PPM, and electrical connections via removable terminal block with knockouts for conduit fitting. It provides output signals via BACnet MS/TP, MODBUS® RTU, or MODBUS® ASCII communication protocols. It covers an area of 5000 to 7500 sq ft typical and allows zero and span adjustments via pushbutton. It can be calibrated using the A-449 auxiliary display, and storage temperature limits for best sensor life are 32 to 68°F (0 to 20°C).