Xiyue Thermocouple Thermometer Digital K Type Thermometer with 4 Thermocouples, -328~2500℉ Measuring Range HVAC Dual Channels Temperature Meter Gauge with LED Backlight & ADJ Compensationc Gas Detector

【Wide Measurement Range】The main unit measuring range is: -328~2501℉(-200~1372℃); Range of K type thermocouple(Stainless Steel):-58~1292℉(-50~700°C); Bead-type thermocouple(blue):-4~392℉(-20~200°C) 【Multi-Functional】: HD large screen display, ℉/℃ and K/J switchable, Max/Min/Average, Data Hold, Auto power-off function(can be cancelled manually) 【Differential Temperature】Long press T1-T2 or T2-T1, and find the difference temperature value between T1&T2 testing samples easily 【Hi/Low Flash Alarm】Manually set the upper and lower alarm thresholds. The red backlight of the screen will flash when the testing value is higher or lower than the set thresholds 【ADJ compensation】Long press Hi and Low button together, adjust the ADJ compensation value to complete the calibration procedure, ADJ compensation range: -9~9℃