I hadn't heard of that brand, but this one has been around for a few years.
I'd have to vote for "Snake Oil"...considering the vast majority of self-contained reach-ins use a constant cut-in, coil sensing temperature control, it goes without saying that these little gems wouldn't work very well.
Interesting idea,reminds me of a wine cooler control which was a probe in a bottle of fluid which sensed fluid temp. and cycled unit through a logic board which also inputted room temp. and humidity.Very limited/specific application but quite effective.
Seen similar sensors used to monitor/mimic product temp. They were used for alarms only, not to control the equipment. Same with the glycerol filled bottles in lab units. Usually for the recording equipment. One problem with using them to control food equipment is the health department. If they see air temps above 41 degrees they will tell you to toss the food.
Just had this product, introduced onto another forum for frosties!
So the engineers out there ask for a bit of engineering proof of the principles on what they claim.
best reply from those flogging the ecocube, is "Trust me, it just works"
SNAKE OIL with some added live Dodo droppings.