Thermometer RST FG-100 soldering iron thermometer features: 0.2mm CA sensor accurately and quickly measures the temperature of the soldering tip, suitable for lead-free soldering. The tip temperature can be measured at any angle according to the shape of the tip. Automatic shutdown function turns off power after 3 minutes of inactivity. Includes MAX HOLD function to record the highest temperature of the soldering tip; when the [MAX HOLD] button is pressed, "MAX HOLD" appears on the lower right of the LCD and the peak temperature is displayed. Features low battery indication and sensor fault detection. Soldering iron tip thermometer with temperature testing range from 0 to 700C. Provides reliable temperature control for soldering iron tips. Compact design saves workspace and allows for easy portability. Digital display offers clear, accurate readings. Large, easy-to-read LCD screen. Handheld style, digital display type, model number FG-100, intended for industrial use. Operates based on temperature sensor technology. Allows measurement from any direction depending on tip shape. Auto shut-off activates if no operation occurs within 3 minutes. Temperature resolution: 1C. Measurement range: 0 to 700C. Accuracy: 3C (300 to 600C), 5C (outside this range). Operating environment: 0 to 40C ambient temperature, 20 to 90% RH (non-condensing). Complies with rated pollution degree 2 per IEC/UL 61010-1. Powered by 9V 006P dry battery.