Dwyer CMT200-FC Carbon Monoxide Transmitter accurately measures CO levels in a temperature range of -4 to 104°F (-20 to 40°C). With an electrochemical sensor, it has a 2-3 year lifespan and an accuracy of ±2.5% of reading. It operates on 24 VDC/VAC at 100 mA and has a response time of less than 60 seconds. The transmitter can detect CO concentrations from 0 to 125 PPM across a coverage area of 7500 square feet. It provides a 2-line alphanumeric LCD display, supports both 4-20 mA and 2-10 VDC voltage outputs, and features an optional relay. The unit has a repeatability of ±1% of reading and works in humidity levels of 15 to 90%.