bayite AC 110V Fahrenheit Digital Temperature Controller 10A 1 Relay with NTC 10K Sensor Probe

Updated June 2025: The original is still working with my freezer. The mechanical temperature controller in my refrigerator finally failed and used one of these to replace it. If I had bought a replacement mechanical controller it would have cost me $80.Updated; Mar 2024. I have been using this temperature controller on my freezer for almost 4 years now with no problems. Just bought a couple more. I plan to use one to replace a failing mechanical thermostat on my refrigerator.The extra is a spare.The thermostat failed on my chest freezer. The first thing I did was to buy a replacement thermostat, but it turned out there was no way to thread the sensor into the original location. So I bought this instead.The sensor was relatively easy to setup as long as the instructions are followed. A splice had to be added into the neutral line to have a connection to the controller. If I did it again I would use a terminal strip to wire everything together rather than a crimp splice. Some time was also spent modifiying the cover plate where the original mechanical thermstat was mounted.In all about 4 hours of work was needed to do the install. I would rate the installation as moderately difficult.Since there are some reports of failures in both the controller and the thermocouple, I have purchased a second one to have as spare. They are cheap enough.

This thermostat is easy to use, install and afford. I fashioned myself a project box (see photo) to put the device in, along with a standard wall switch and wall socket plate, to power 4 exhaust fans for my attic. After setting it to turn on at 104 degrees and off at 100 degrees I tested its accuracy with a thermometer that I had placed next to it. Both the thermometer and the thermostat displayed the same Fahrenheit measure and the relay triggered correctly to turn the thermostat on and off at the right temperatures.I'm using this thermostat to trigger during excessive summer heat, but you can set it to trigger for excessive cold as well. IOW, it works both ways. I like the 1100 watt output rating and the broad temperature bandwidth (-4 through 230 degrees F). The sensor works great and is accurate and it can be placed as much as ~10 feet from the device. For the price, it can't be beat.

The controller works great!The user instructions are a little bit confusing but once you get them handled it is a snap. I used this to convert a 5.0 cubic foot chest freezer to a refrigerator. I was able to set a lower limit at which the unit turns off, and an upper limit at which it turns on. The freezer now chills to 33 degrees and shuts off for about 5 hours. When it reaches 42 degrees the unit turns on until it reaches 33 degrees. This takes about 30 minutes. ( I set the difference between the target temp and the upper limit at 12 degrees)In a 24 hour period the freezer compressor only runs a total of about 2 hours and fifteen minutesThis controller can be used to set a target cold temperature [OFF] with an upper limit [ON] this is achieved by setting the temperature difference to the number of degrees above the target temp you want to allow before it turns on.This controller can also be used to control a heating unit.I chose this unit for it's ability to set upper and lower limits.I used an a grounded extension cord to provide juice to the unit and provide the switched outlet to plug my freezer into.I like the display that shows the current sensor temp and it's status. The long sensor cable is nice and didn't require me to modify the freezer at all.GREAT DEVICE. NICE PRICE.

We have an outdoor dog and winters that can become cold. I purchased this to use with a dog bed warming pad inside the dog's house. It was easy to set the temperature in which the dog pad comes on (and stays on till that temperature is exceeded again). Has an indicator light that shows when the pad is on. Works well, easy to set. I would purchase again.