A general purpose temperature controller
Mark A. Handschy · Journal of Physics E Scientific Instruments · 1980
A simple, inexpensive temperature controller is described. This controller is capable of maintaining temperatures constant to less than 100 mu K in a variety of thermostats. It uses a thermistor in a DC Wheatstone bridge. The simplicity of DC detection allows the use of readily available electronic components, and ensures a low total cost. Furthermore, thermostatting of the electronics is generally not necessary.