Water level sensor is used in the market, similar can be used in the coffee machine to detect low liquid level, hanging hot machine to prevent water warning and so on. There are many kinds of home appliances that can use water level sensors. There are sewage tanks and clean water boxes in the household floor washer, among which the sewage tanks also need to be tested. The non-contact water level sensor can detect high and low liquid levels. If you want to detect low liquid levels, the sensor can be installed at the bottom of the water tank. When the water level drops to the low level, the liquid level sensor will give a signal indicating the water shortage state, and the device will stop working after receiving the signal. Similarly, the capacitive water level sensor is installed at the height of the liquid level. When the water is added to a certain position, the capacitive liquid level switch will also give a signal, so that the equipment will stop adding water.
This application is not suitable for floating ball, floating ball has magnetic magnet easy to absorb impurities in water to form scale, not hygienic. And scale will lead to the increase of floating ball weight, affect the accuracy of liquid level detection. The floating ball structure is complex and loose, which is not easy to clean. The photoelectric structure is simple and easy to clean. However, in the sewage tank of the ground washing machine, if the dirt is too much, you can remind the user to clean the sensor in time, so as to avoid the influence of the sensor detection due to dirt.
