• Maximum registering pointer indicates highest temperature reached • Waterproof and pressurized to withstand autoclaving cycle• 304 stainless steel body with glass lens withstands moisture, pressure and high temperature• ¼\" NPT threaded connection screws directly into in-line processes• 2\" (50 mm) probe length This durable bi-metal thermometer measures temperature in the range of 0 to 300°F (-20 to 150°C) with a dial size of 3-3\/16†(81 mm). The black pointer within the dial indicates the actual temperature, and the red pointer indicates the highest temperature reached prior to a manual reset. The thermometer can be placed on a flat surface with the included stand or screwed directly in-line to a 1\/4\" NPT threaded process connection.