The company needed to rank glazing samples by insulating performance and had no way to measure it. I designed and built the whole bench: the insulated test chamber, the sensor stack, the electronics, the firmware, and the safety system that lets it run unattended overnight.
The measurement approach was the interesting decision. Rather than inferring performance from heater power, the rig reads actual heat flow through the sample with a calibrated sensor, and it will not accept a result until the readings have held steady for a full hour. The safety design is layered and redundant, because a heater running all night with nobody watching is a real hazard and not a theoretical one.
It was built for roughly a quarter of what a comparable commercial unit was quoted at, and the same electronics and firmware scale to a larger chamber for full size windows.