Shutao STC-3028 Temperature Controller 24V Temperature and Humidity Controller Meter with Integrated Sensor Dual Digital Display Thermometer Hygrometer Incubator Controller

I have a keezer and use it to store my drinks ;) However, I don't like all the water build up, so I've had several dehumidifiers in the keezer. The problem is if you run them all the time, they will freeze up when the keezer kicks on. I used this device to turn on my dehumidifier when it gets too high.A couple things to note that I had to somewhat guess at. I bought the 12v version. It does power on with 12vs on the input. Looking at the back, on the left is positive, the right negative.I then ran a jumper from the positive to the left side dehumidifier post. I then connected my dehumidifiers positive wire to the right side. That will be the switched side.I put the negative power wire and negative dehumidifier on the right side post of the power.When the device detects the humidity is too high, it closes the switch, and my dehumidifier turns on. when it's low enough, the dehumidifier will turn off.I'm assuming that the 24v version will run off of 24 volts, and 120 is 120.Another thing to note. My dehumidifier came with a 120->12v powersupply that used a "B type" power plug for portable fridges. I found a 12v version for cigarette lighters with the same end.I chopped the end off of the powersupply to use it to power everything, and I chopped the cigarette/power adapter end off of the extra to hook to the device and the B side plugged into my dehumidifier. All said and done, it works great. We'll see how long it lasts.

The unit works. Contacts close and open as desired. I recommend searching a youtube video for high and low setpoints.

I have fixed this unit to my green house and it works well so far.However I would like to have extra sensors for standby spare. Because the humidity reading gets locked at 100% on some days

I ordered 2, one was good the other not so much. Amazon senta replacement and I sent the other one back. No hassle.

It works. Humidity measurement is 20% off, but it does track humidity. It turns "LLL" indication and disconnects relay for a second once an hour or so. I can live with that for my application, but I guess not everybody would.