Designed to prevent injuries from accidental contact with dangerously hot surfaces, Hot Hand Indicator can be used over range of -30 to +90°C, in environments where UV is not excessive. Bright yellow adhesive label appears blank when cold. When surface to which label is adheres exceeds 50 or 70°C, word Hot and warning graphic appear. Applications include electric motors, gas and diesel engines, pumps, valves, furnaces, and boilers.