our measuring instruments range is a collection of test instruments using microprocessor technology to measure different parameters such as temperature, humidity, ph level, water quality, wind velocity, electrical, etc. these are simple and easy-to-use instruments but highly accurate which makes it ideal for anybody. tc-250 the tc-250 is a mid-range k-type probe thermometer that can delivery wide range temperature measurement of -160°c ~ 1372°c. it is a simple and easy to use thermometer with a sturdy housing for better protection. the front panel keys have a smooth feeling and it can easily be wipe cleaned. besides the wide measuring range and high accuracy of ±0.1% of reading +0.7°c, a large view lcd will display the measured temperature in a large figure size with a resolution of 0.1°c for temperature measurement of +199°c or less, and 1°c resolution for above +200°c temperatures. the tc-250 is powered by a 9v battery and it has an auto-power off feature to ensure long battery life. the h