Review on 🌡️ DaFuRui 3Pack W1209 Temperature Controller Module with Case, Red Digital Display Temperature Control Module DC 12V, 30cm Waterproof Probe -50~110℃ by Gregory Plump

Using an external fridge is good, poor implementation but good utility. The fridge's internal thermostat is low voltage/wattage so it would make more sense to connect the two wires of that thermostat and parallel the compressor circuit directly than it is archaic to use an internal lightbulb. Also wastes energy and increases fire hazard, but I digress. The 2-wire RTD is very inaccurate when taking temperature sweeps. The user should buy a 3 wire 100 RTD, connect the 2 red ones together and use them on the (-) terminal, the white one connects to the (+) wire. Pulls the control down to +/- 0.2C on this controller compared to +/- 1C on a cheap 2-wire RTD. You can also increase the temperature range.