PerfectPrime TC0521, 4 Channels Thermocouple Thermometer K,J,E,T,N,R,S Type Data Logger, USB PC & Wireless to Mobile app iOS/Android

This unit has a lot of good things going for it: Well built, decent price, supports various types of Thermo-couples. I originally didn’t think the unit worked properly as it wouldn’t power up up right - but that was my fault for inserting a battery backwards. Once that was corrected - the unit worked fine and was easy to use with good read-outs. I’ve had good luck with various products from Perfect Prime and this one looks like another winner.

I want to love this. Physically it's a great unit, the display is easy to read, the buttons feel good, everything feels like pretty solid quality. Accuracy looks good, and having four channels really lets you do a lot.The problem is that the software is questionable at best. Running Windows 11 on my laptop, after installing I can start up the software and immediately see that the device is connected (via USB or Bluetooth) because the readings on the "soft" device are mirroring the actual device. I can sometimes start the live readings on the chart with a USB connection and see the chart updated in real time, but if I stop and try to restart the readings or do pretty much anything, I can no longer get readings to appear on the chart. Even if I close the graph completely and start a new reading, nothing happens.Via Bluetooth, the device connects easily to the software and updates are again visible on the "soft" device, but I have never gotten the graph to work correctly. Real time readings just don't work. when I give up and hit stop after a minute or two, there is at most 1 reading (and sometimes zero), despite trying reading rates of anywhere from 1 second to 5 seconds.I thought maybe I could try something else, so I loaded Artisan (coffee roasting software) but it doesn't support this device so that didn't help. Connecting to the iPhone app went better, I could see the readings and the graph updates correctly, although the features on the app are severely limited, there's no landscape support, no ability to zoom on the graph, no way to set Y-axis intervals, etc.For the money, I feel like we should get software that works. Something that's updated regularly rather than just left to rot. The phone software's last update was 5 years ago and doesn't even support the display ratios of modern phones (not even my phone which is 4 years old!). The PC software has the distinct scent of Windows 95/98, so who knows how long it's been since they updated it; there's no version info in the zip file.I really bought this to use with software, and using the bluetooth feature. While technically using it with the phone works, I have to wonder for how long? When does the app get to be so far out of date that it's no longer usable? And why bother using the phone app when it has so few features? Since I can't use the PC software with bluetooth, there's just too many features that I can't utilize. I paid for them, but I can't use them. I'll be returning this model and looking for something else.

I bought the 4 channel USB model, because I specifically needed to monitor temps on my boiler zone pipes (using K-type pipe clamps). Overall, it works well for what it is. Reported temps were within ~2 degrees of my reference thermometer, so I didn't need to calibrate anything out of the box (good enough for my needs/accuracy). I got a 9V adapter to run it off AC constantly, and I use the USB connector to a small IOT server that reads the temps periodically and pushes them to Home Assistant for review/handling. I wrote my own Linux software using the protocol PDF they publish on their website.My only callout is the USB connector (just a CP210x TTL to USB) doesn't play well with low-grade IOT boards (Raspberry Pi models 2, 3; Nano Pi) -- once you plug in the USB, the readings on the unit freak out and become incorrect in reported temps. Unplug USB, and it immediatey goes back to being fine. I suspect it has something to do with how the cheaper IOT boards don't have good USB power rail isolation. Everything always worked on typical PCs, and I wound up going with an Atom-based Wyse unit to run the USB connection as my server and log ongoing temps.

only bad thing i can think of is battery life. thats it. if you set it to 20 or 30 minutes between data points the batteries will go dead prior to finishing one cycle. nocking it down to 10 minutes per data point allows it to complete a full data logging run without the unit going dead.I used this over the last 10 months to measure and data log the temperature of a 40 kw lithium battery bank. I was able to set 4 probes in various locations to log the temps to validate my DIY battery heater system that is essential for my LiFePo4 battery bank as you should not charge at low temps.taking a temp reading every 30 minutes was too long and the batteries would go dead before a full cycle was recorded, had to dial it down to every10 minutes and with the total number of data logged points the batteries would just barely last. it would be nice if this same unit came with an AC adapter so I could log for a week or two straight vice the 3 days that I am limited to with the AA batteries that fit it.now it is logging the summer months to ensure that the cooling system is working as well. I can think of many more things that I can use this for in the future.

焙煎温度用の外部出力機能を利用したくて購入、無事接続できました。デバイスの割り当てはCENTER300です。