2PCS Temperature Controller Module with Case, XH W1209 LED Display Digital Thermostat Module with Waterproof NTC Probe -50~110℃ Electronic Temperature Temp Control Module Switch

I used it to control auxiliary cooling fans on a vehicle. It was a little tedious to set up the case that comes with these, and they're set up for pretty small wire. I used the 2 thermostats to get high and low fan speeds using 3 external relays, since my fans draw more current than the units are rated for. The attached picture shows it with all control wires assembled for my application.

I used this product to control a silicone windshield wiper heater strip rated at 50w 4.2amps. The other one will be used to control a 12v cpu fan to provide air circulation inside a 12v portable freezer/refrigerator. Instructions were bad as usual but I finally figured out the settings. One of the acrylic cases arrived with broken parts. These have very small nuts and screws and assembly will take good eyesight. Recommend using a dab of hot glue or Elmer’s glue on each nut once you get it put together to keep them from falling off and rolling under the refrigerator. The 4 power block terminals are very small gauge and the screw heads which grip the wires are very soft metal. Solid core bell wire fit nicely but stranded wire is almost impossible to use unless you just solder it to the terminals. Overall it was a pain to get them put together and do what I wanted them to do but they work and the two pack with cases is a good value. If the people who sold me this item read this review, you owe me a case.

Used this fir a diy filament drier and works great

I'd give this product zero stars if I could. It took longer to assemble the cases than both products lasted in operation. First unit died in a couple of minutes when the processor started smoking. The second unit died after about ten minutes the same way. Both were powered by a 12V battery and were switching a 2A load. Now I'll spend $5 in fuel, plus time, to a return dead controllers for a $9 refund. I should have know better. These would have been a great solution for my application but too good to be true.

I have some older firmware versions of this thermostat (settings only go from P0-P6) and the P5 setting (delay start) only works once when the power is applied to the thermostat but no delays afterward.In this order, I received the newer firmware (settings go from P0-P8). The delay start setting works repeatedly this time. However, the P5 setting appears to be in seconds (not minutes). I can set the P5 delay start value from 0 to 600 seconds. The delay start feature appears to work in both heating and cooling modes (set by P0).In my application, I'm controlling a compressor type refrigerator. When the compressor is turned off, it must rest for a minimum time before it can be re-started. The delay time (setting P5, now in units of seconds) ensures the minimum compressor rest time.I like the included case with these thermostats. Now that I know the delay start time works, I will definitely be buying more of these thermostats.

Great !

I gave a rating of 3 because only one of the two units worked, and for me the instructions are a bit confusing. I found some well written instructions online which made the setup very easy. The one unit I have connected is working well and doing what I expect it to do.

I use these a lot for temperature control of room heaters. With addition of 12V DC wall transformer, 120V 30A relay and a dual 120V receptacle with enclosure one can build very low cost local temperature control. Just make sure you know what you are doing if you want to make one yourself, or better yet, ask an electrician to build one for you.