Frigga 2Pack USB Temperature Data Logger Single Use Temperature Recorder 100 Days High Accuracy Thermometer Monitor 14400 Points with PDF CSV Report, U2

These little temperature loggers are awesome! Very simple to use despite the instructions on the label being wrong. Turn it on my holding down the button for 5 seconds. There's a 30 minute recording delay which is somewhat annoying depending on how you're planning on using these. Turn it off by plugging it into your computer to generate the log as an excel file and a PDF. Holding the button again for 5 seconds does nothing despite what the directions say. I also have a Frigga M2H which is reusable and customizable using the Frigga software on your computer. If you're not trying to fit these loggers in tight places, the M2H is the one to get (unless you're worried about losing it, it's more expensive). It's just bigger.

These are two 100 day disposable temperature loggers, the came wrapped in plastic and with an instruction card. The card really doesn't have instructions, it has a QR code to get the instructions, but it takes you to the U-1 model instructions and this is the U-2 model. I was able to find U-2 specifications, but not instructions. On the back of the logger it says to hold down the power button for over five seconds to start it and the OK light will blink. This is correct. It also says to hold down the power button for five seconds to turn it off and the alarm light will blink. This is incorrect. So, no instructions at the QR code link and the instructions printed on it are incorrect. I can't really recommend this device even if collects the data and allows me to download it because of the problems with the instructions. Hopefully it will create a CSV file as indicated and allow me to get the readings via the USB connector which is what the instructions say for the U-1 model, maybe it will operate the same way.