The Ametek-Jofra RTC157 Reference Temperature Calibrator is the most accurate and stable reference temperature calibrator on the market. It features a wide temperature range of -25°C to 150°C, with an accuracy of ±0.005°C and a stability of ±0.001°C. The RTC157 also has a built-in reference thermometer, which eliminates the need for an external reference thermometer. This makes it the ideal choice for calibrating temperature sensors and transmitters in the field or in the lab.