Accurate measurement- The bimetallic measuring system consists of two metal plates with different coefficients of expansion. This make sure precise temperature readings by translating temperature changes into mechanical movements, displayed on the 63mm dial. construction- Made of galvanized steel, this tube thermometer is built to withstand harsh conditions and make sure long-lasting performance. Its compact size (3*6.3*1cm) allows for easy installation in tight spaces. Easy installation- Equipped with a spring, this tube thermometer can be quickly and securely attached to pipes. It is compatible with standard pipes and make sure a tight and stable connection.