JRI's LoRa SPY T0 data logger measures and records temperature. The T0 has a high IP rating of IP68 and internal sensor. This allows it to be placed entirely inside the fridge. The measuring range is -35°C to 85°C.  The logger is the only one from the LoRa range that has no display but does have the 3 alarm LEDs (green, blue, red). The LoRa SPY operates +/- 2 years on one lithium battery and has a memory for 10,000 measurement points. Optionally available with a COFRAC (primary ISO 17025 certificate) or traceable calibration.