The HI99551 is an infrared thermometer designed to measure surface temperatures for the food industry. With a quick, one-second response time, a HOLD function, and battery life indicator, this thermometer is an ideal solution for non-intrusive infrared measurements. There are two models of the HI99551 infrared thermometers, each offering a different measurement range and resolution. The HI99551-00 covers a temperature range from -10 to 300°C with 1°C resolution, while the HI99551-10 covers a temperature range from -20.0 to 199.9°C with 0.1°C resolution.