Review on Gain Express AZ Instruments 4-Channel K Type Thermometer with SD Card Data Logger, Thermocouple Temperature Measurement, and 2 Bead Type K-Thermocouple Probes by Trey Harvey

Generally satisfied with the data logger. I've tested it quite extensively, the battery lasts a long time. It's great to have all the data in one .txt file that I can export to Excel. Certainly unbeatable for the price. Checked the thermocouples in the ice bath, found to be well calibrated. The only caveat is that I ran some tests with quite a bit of electrical noise (huge current transformers produce 200 amps) and this seemed to skew the data. Temperature jumped up and down 20 degrees - not sure if it's thermocouples or recorders. Tests with a Fluke multimeter and its thermocouples did not respond to electrical noise. But otherwise I had no problems.