UNI-T UT309C is a professional infrared thermometer designed to accurately measure surface temperatures without physical contact. It features a wide temperature range of -35°C to 650°C (-31°F to 1202°F), making it suitable for various industrial, automotive, electrical, and HVAC applications. With a distance-to-spot ratio of 12:1, it can measure temperatures from a safe distance, minimizing the risk of injury or damage to the target object.