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

Great with data logger function and USB readout to a PC.

Works fantastic. I use it for DIY AC work and monitoring my home AC. Very happy with it.

Works well, except that min/max/ avg does absolutely nothing, continues displaying both current temperatures in those modes.

The seller is dedicated to customer service. Initially I gave this a one star review because the unit was defective out of the box. One of the LCD segments was non-functional. I returned the initial unit.The seller reached out to me and offered me a replacement unit free of charge. I accepted the unit and it works great. It appears to be within a degree of calibration. I checked it using an ice bath and boiling water.Over all I'm very happy with the unit.

This unit does not have data logging. I’m using it to monitor kiln temperature. I purchased a kit (separately) to remove the need for batteries and it still powers off after about 8-12 hours. I feel this may either be defective, or lack of transparency by seller. Not a big issue if someone is using it to read the temperature, however since my intention was to track and analyze the data on my computer, I can’t do it with this model, which is why I bought it in the first place. Ideally, if this product did what I thought it was supposed to, it could track my whole firing schedule (12-24 hours), however disappointed because it’s essentially a steel tipped laser pointer thermometer. I’ve used the current set up to monitor greenware up until the lower limits of the quartz inversion stage with the capabilities by the thermocouple that came with the product, and cones the rest of the way. I’m waiting on a porcelain encased, platinum rhodium tip k type probe, but may consider refunding this unit due to its limited functionality for my uses in the meantime.

Device: decent build. Great display. Viewing data points on device handy. Can read data while recording. Date and time cannot be set in device, you will need to make a note of when you start recording.Software: looks and feels like its from 1995. Defaults to celsius; change units in right hand side prior to importing data. Live data recording is handy. Exporting table to excel nice BUT it includes the degrees symbol, which makes using the data hard. HINT: use =substitute function to remove degrees and then use =value function to turn it into a number. Youll essentially have to build a template to copy and paste exported data to in order to use it. It is dumb you have to do this to use the data and i have removed a star just because of this.Getting this device to communicate with COM ports is tricky. Youll need to enable COM ports in the device manager under legacy software. Once thats done youll notice when you plug it in a port appears with a "!" on it. This means it doesnt have the correct driver. Google search "CH341SER" and the first link will bring you to a downloadable file. Download file. Then go into device manager and manually update driver for this port while device is plugged in. Search that downloaded folder and computer should pull drivers it needs. Should work after that.Function: instructions are missing info. Doesnt talk about calibrating and using adjustment feature. My understanding is you can adjust each channel by whole number degrees to calibrate it. Boiling water would do the trick. Note that calibration technically depends on length of wire. Wish the time intervals were better; it goes from 1 minute to 30 minutes with no way to change it (10 would be nice). This gets annoying cause it only can store 5000 points... so at 1minute thats almost 3.5 days.

This item greatly exceeded my expectations! Would buy again or buy other items from this company.Internal calibration already set up. When thermocouples are shielded from drafts and light they read the same temperature, just as they should. The low mass thermocouples respond quickly. Looking forward to using it with waterproof thermocouples.The included case is very nice and the unit has a solid well-built feel.The software is nice, but the narrow light-colored lines are hard to see on the graph with a white background.Overall, 5+ stars.

I purchased also a clamp sensor from the same manufacture on Amazon. They work great, accurate to read out subcooling from my HVAC.