A Device for Temperature Control of a Liquid Bath

A device for temperature control of a liquid bath was presented, using a thermoregulator, an FET, a pulse generator, an SCR, and a heater.In the device, the FET was used instead of a vacuum-tube, and a triggering signal was applied to turn the SCR on. In order to generate pulse, any of the following three methods was used; the astable multivibrator, the blocking-oscillator circuit and the relaxation-oscillator circuit.The detail of the circuits was presented and the operation of them was described.