Thermocouple Thermometer Data Logger 4 Channels Digital K Type Thermometer with 5000 Groups Programmable Temperature Recording -328~2501℉ Measuring Range, Audible & Visible Alarm 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.

This thermocouple temperature data logger is a fair value, but honestly it's documentation is atrocious. Chiefly, you need to know that the software used to interact with this data logger apparently only runs under 64-bit versions of Microsoft Windows (64-bit Windows 10 in my case). There is no MacOS version of the software, and I would guess that there are no plans at the manufacturer to produce one in the future. Another positive (I think) was that when I emailed the manufacturer to ask about the Windows version compatibilities, I got a reply within a few hours (on a late Friday evening). That said, while the manufacturer did give me a list of compatible windows versions (Windows 7, 8, 10, and 11), they didn't state clearly that a 64-bit version of Windows is required. I was lucky to have access to the 64-bit version of Windows 10 through my employer (a university), so I had the luxury of doing trial-and-error troubleshooting of the software compatibility issue on an old Mac notebook that I had available to me. Also, once you get the data logger software running, you need to open a serial link to the logger in the software before it will work as expected.

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.

Don't be deceived: The four channel and two channel units are displayed together here, but the two-channel unit does not have a logging capability. I'm returning it. Disappointed!This is an edit: This review reflects exactly the problem with this listing. These are two distinctly different products listed as options under one listing. I found this by searching for a logging thermometer. Then, being presented with two options - one with two channels and one with four - I selected the two-channel option because it was cheaper, and I only needed two. But I can't even submit a separate review for the four-channel unit, because I already submitted a review for the two-channel unit, and they are listed together on Amazon as two versions of one product. They are not.I did buy the four-channel, it works great, and the software ran perfectly under Windows 11. But I am not changing my one-star rating because attention needs to be called to the way these products are listed.

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.