Must purchase the RAYMI3COMM in order for the instrument to function.Low temperature sensor with a measurement range of -40 to 600°C (-40 to 1112°F) and a fast response (<130 ms), provides an impressive array of solutions for your process needs. The miniature stainless steel sensing head is small enough to fit in many places that are inaccessible to conventional sensors and rugged enough to ensure reliable long term performance in the harshest industrial environments; it can survive ambient temperatures of 14 to 248°F (-10 to 120°C) without cooling. Although the MI3 sensor is small in size, it has all the performance you need– with 1% accuracy and a choice of high resolution optics up to 10:1.