SUPER WIDE TEMP MEASURING RANGE :The main unit Thermometer's temperature measuring range is from -328 to 2501°F(-200 to 1372°C), and the stainless steel K-type thermocouple probe is: -58 to 1292°F(-50 to 700°C), the Bead-type porbe is : -4 to 392°F(-20 to 200°C). Greatly meets the user's requirements for superheat or subcooling testing DUAL CHANNEL : Our Type K Thermometer provides two channels of temp simultaneous measurement T1 and T2, with two kinds of thermocouples two pcs of probes that allowing for dual channel differential temperature measurement WITH FLASH ALARM : This thermocouple thermometer features with Hi and Low Flash Alarm function,which can let you instant know of the current temperature values are overload or lower than your preset thresholds VERSATILE METER: This K and J thermocouple meter features Backlight LCD screen enabling dual temp readouts for easy reading even in dark areas. °F / ℃ units switchable, as well as K and J type measurement Switchable. ADJ COMPENSATION FUNCTION: This handheld HAVC temperature meter features ADJ compensation ensuring for high precision and stability measurement. User can adjust the ADJ compensation value (range of -9 to 9℃ / 15.8 to 48.2°F ) to complete the calibration procedur WIDEY APPLICATION: With such a high accuracy industrial temperature meter support type k or J thermocouple measuring and dual channels that help you save money and time, espcailly for lab research. It's an ideal tool for HVAC, microwave oven, aquarium, refrigeration Equipment, etc Digital Thermocouple Thermometer Dual-Channel K/J Type Thermometer -328~2501℉ Wide Range HVAC Thermometer Industrial Temperature Meter with 4PCS of K-Type Thermocouple Probes, Alarm,Temp Conpensation for ultal high and low temperature surface meansurement.