Customer manufactures sensors for ice makers. They use dry ice to set the thermostats. It's troublesome storing the materials and they lose a lot of it in storage. By using the Model 3825 Adjustable Spot Cooler System, they were able to dial in the exact temperature they wanted and eliminate the costly and potentially dangerous dry ice. An added benefit of the adjustablilty of the Adjustable Spot Cooler is that they were able to do a more extensive test by raising and lowering the temperature from the spot cooler.