The main unit Thermometer's temperature measuring range is from -328 to 2501℉(-200 to 1372℃), and the stainless steel K-type thermocouple probe is: -58 to 1292℉(-50 to 700℃), the Bead-type porbe is: -4 to 392℉(-20 to 200℃). Greatly meets the user's requirements for superheat or subcooling testing. 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. 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. 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. This handheld 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℉) to complete the calibration procedur. Color:As Shown Material:Metal Package Contents: 1set * temperature probe hvac Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.