This wall-mounted transmitter is designed to measure both carbon dioxide levels and temperature in HVAC systems. It features a highly accurate sensor that can detect CO2 levels up to 2,000 parts per million, making it ideal for use in commercial and industrial settings. The transmitter also includes a built-in temperature sensor that can measure temperatures ranging from -40 to 140 degrees Fahrenheit. With its compact design and easy installation process, this transmitter is a reliable and efficient solution for monitoring indoor air quality and maintaining optimal HVAC performance.