This temperature indicator is a reliable tool for HVAC service technicians to accurately measure temperature in a variety of settings. With a 2.5" dial, it provides clear and easy-to-read measurements, making it an essential addition to any technician's toolkit. Its range of 50/100F ensures that it can be used in a wide range of applications, and its precision ensures accurate readings every time. Whether you're working on residential or commercial HVAC systems, this temperature indicator is a must-have for any technician looking to provide top-quality service.