Circuit, if the thermistor K273 temperature reaches the setting level or not two sensor electrodes immersed in liquid, so that it is heated by turning on the relay. This ensure
s that, when the heating is turned on there is always a minimum amount of liquid in the container. The circuit can also be used to monitor other liquid level. As shown in the level sensor is connected to the differential amplifier 1, the use of additional relay contact can be made to stop the supply of the liquid when the liquid level reaches the required so as to maintain the liquid level constant. Technical data: Operating voltage: 15V adjustable temperature: 95 degrees Celsius at 25.60 or voltage fluctuations (-15 ~ + 10%) and temperature (0 to 70 degrees Celsius) temperature deviation: 1 degree Celsius.