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High Quality Thermostat Design Details
Application:
Chris Simmons
Reviewed in the United States on April 15, 2024
This t-stat is not for cooling. The contact is N.C. at low temperature. When ambient temperature increased to set point, the contact opens. For cooling purposes, one would want the opposite. The contact should close when temperature reaches a heated state, actuating a cooling device.I went ahead and kept the blue one listed here as "cooling" and installed a control relay to work in conjunction. When temperature is low, and the t-stat is closed, it actuates my control relay. I've wired a cooling fan to the N.O. contact on my control relay. When temperature rises to set point or above, the t-stat opens, causing the N.O. contact for my fan to close.Not an efficient way to accomplish cooling. Had to use another device (control relay) and some additional wiring. My issue though, it that my control relay stays energized for most of the time since not too many days are hot enough to call for cooling. This may cause premature failure of my control relay?This "fail safe" wiring method, may be what some want for the equipment they are wanting to protect. Mine is not that critical. And, I would have preferred this blue t-stat's shelf state, to be N.O instead of N.C in normal temperatures.Pictures of other vendors of small DIN rail mounted t-stats look similar to this one (Blue with Gray frame). My guess is that the same Chinese factory produces all of them and each vendor puts his stamp/name on it.The red ones (called "heating") that have similar gray frames probably have contacts just the opposite of these blue ones. And, would probably be better suited for cooling. Just guessing here. . .
Matthew
Reviewed in the United States on November 19, 2023
Does not trigger at specified temperature. Had it set for 0c (32f), did not cut off until -2c (28f) and then didn't turn back on until 4c (40f). A 6c (12f) variance is unacceptable for my application... Guess I'll buy a digital one.
bookbinder57
Reviewed in the United States on July 24, 2022
This may be a off label application, but I thought this thermostat would fit the bill.I have a solar pool heater panel. The task was to turn the pump ON when the sun warms the panel and shut it OFF when the sun no longer provides heat.I took a small amo box that I painted black and ran the power cables through it. the thermostat was tucked into a crevice under the lid and the top was insulated from the bottom of the box by a sheet of Styrofoam.Even though the temperature difference between the hot feeling lid during sunshine and ambient temperature at sundown was quite large it took probably 8 days to find a setting, that would reliably turn the pump OFF at night and ON during sunshine.This hysteresis would make it completely unusable to control room temperature.I bought it for the low price and form factor, but was almost ready to ditch it because it was so difficult to find a setting that worked.
Skinner
Reviewed in the United States on February 25, 2022
Works well for my diesel heater axial fans i installed in case I put the parking heater in
GKL
Reviewed in the United States on September 23, 2021
It's very compact and easy to fit into a crowded panel. However, the tabs for mounting on a DIN rail are very small and have little flex. There's also no easy way to remove it from a rail.
Lurch
Reviewed in the United States on May 31, 2021
Work pretty good. Used it to replace a digital device that was a lot more accurate, but also more complicated and a lot more "delicate". Only con for me is the larger set point differential. But again, close enough for my application.
TOM F.
Reviewed in Canada on March 6, 2021
Differential Range of temperature too large.The product wood engage at 60 deg f and turn off at 28 deg f. Far too great of a difference to be useful.
Miffedone
Reviewed in the United States on March 17, 2018
Less than half the size of a wall thermostat, great for tight spots like inside a fridge. Works great, simple on/off closure, widely adjustable. Omes with plastic prongs on the back, snip off if they din’t fit your application. I used it to turn a non-adjustable pizoelectric fridge into fulky twmperature adjustable. Two wire hookup. Couldn’t be easier. [I have edited this review from 5 star to 4. I still like it, in fact I have bought another, but the adjustment switch is so small it’s hard to get a precise temp. At 68 even a small nudge sends it to 73. It is difficult to home in on a precise range. It can be done, but it takes some finagling.]
Paul M.
Reviewed in the United States on June 6, 2017
The switch works just fine but the temperature scale is way off. I set the switching point to around 40 degrees but the scale points to ~25 degrees. I just made a line to point at the correct temperature. I don't know if the error is linear so I'd just ignore the numbers altogether.
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