In summary, Hakko’s FG-100B tip thermometer is an upgrade to the FG-100. It can display both Fahrenheit and Celsius and has an AUTO HOLD feature that minimizes individual differences in temperature measurements by automatically ending a measurement once the tip temperature has stabilized. The auto shut-off attribute turns the thermometer off when not in use for three minutes, and there are two alarm sounds that assist the operator when using the equipment. One sounds when the sensor has burned out and the other indicates when it is time to replace the battery. The sensor provides accurate measurement of tips for verification or calibration processes.