Liquid level and temperature monitoring circuit diagram

In the circuit, if the thermistor K273 reaches the set temperature or the sensor electrode at the liquid level 2 is no longer immersed in the liquid, the relay is turned on to heat it. This ensures that when heating is switched on there is always a minimum amount of liquid in the container.

This circuit can also be used to monitor other liquid levels. As shown in the figure, the sensor of liquid level 1 is connected to the differential amplifier, and the other contacts of the relay can be used to stop the supply of liquid when the required liquid level is reached, thereby keeping the liquid level unchanged.

Main technical data: Working voltage: 15V Adjustable temperature: 25, 60 or 95 degrees Celsius Temperature deviation at voltage fluctuation (+10~-15%) and temperature change (0~70 degrees Celsius): 1 degree Celsius. ck=" window.open(this.src)" alt="Click to see larger image" />