Fig. 10.

Specimen testing chamber building. The PTFE testing chamber and top acrylic plate are hold in place by stainless steel threaded standoffs and threaded rods. The temperature board is attached to the top plate using a rectangular bracket fabricated in the milling machine. The two power supplies used for the Peltier plate and the W1209 control board are secured on the back-end plate under the USB hub. The temperature sensor is pressed fit within a sensor hole carved within the testing chamber.