🌡️ CHENBO(TM) Digital Cooling/Heating Thermostat: 3 Pack with Waterproof Sensor Probe -50-110 °c Temperature Controller - Reliable 12V DC Control, 10A Relay Module Review

An expensive piece of equipment beautifully made. So true. It's pretty safe. At the end you can set the hysteresis of the control system. What really struck me is that the accuracy of a controller would be worth 100 times what it was 25 years ago.

Use these for the water temp control module and they are perfect, it turns off when I say I hear you making noise when I don't. I just want it to have a normally closed contact like most relays, but just latch the temp changes to work at a different temp and then change so the water is the right temp!

The product received did not have a 3.3V regulator in IC3 but a 0 ohm resistor (see lower right corner of the picture). The picture on the parts page clearly shows the IC regulator mounted on the board. When the power was turned on, the circuit board got very hot and could burn out if not turned off. Not only was this item different from the one pictured, it was clearly dangerous to use.

The product received did not have a 3.3V regulator in IC3 but instead had a 0 ohm resistor (see lower right corner of image). The picture on the parts page clearly shows the IC controller mounted on the board. When the power was turned on, the circuit board got very hot and could burn out if not turned off. Not only was this item different from the one pictured, it was clearly dangerous to use.

These things are great and lots of fun! I was also able to cut the wire between the temp sensor and the board so I could solder a longer wire and keep them further apart and it still worked fine. Google for more instructions on how they work as there are many non-obvious features. There's a whole menu accessed by holding the button down, with about 10 settings or so, where you can control all sorts of things like the power-on delay and the temperature difference between turning it on and off…

Very easy setup that takes less than sixty seconds. Programming has a power outage. The features are great. The only thing missing is the ability to display timing parameters in C or F. Bright, clear display. The imprint is small, the length of the sensor wire is sufficient. The sensor is waterproof. It's good. Poorly. The first device failed after two days due to a rapid voltage change approximately 0.5 seconds apart. The supply voltage is stable at 12.0 volts. The switched output through the…