We recently found a new source for temp gauges and were able to score a bunch of them that not only were cheaper, but also have remote sensors. As a result, we dropped the price of the temp gauges by 40%, and for a limited time are offering them at 20% off if you purchase at the same time as an enclosure.
https://www.3dupfitters.com/products/3d-printer-temperature-gauge
Measuring the temperature inside an enclosure is trickier than you'd think because of the temperature changes with position. Hot air rises, and the temperatures at the top of the enclosure are hotter than at the bottom. Because of this, we've picked a temperature gauge with a wired sensor. You can either just leave the sensor with the display, or move the sensor anywhere you want inside the enclosure.
B.S. Electrical & Computer Engineering
The Ohio State University