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The liquid level sensor is also the liquid level switch. Many companies still use the float-type liquid level switch to detect the liquid level, but the liquid level switch has gradually replaced the float-type liquid level switch. Why? To illustrate with the simplest analogy, float type liquid level switch=functional mobile phone, photoelectric type liquid level switch=smart phone, and the relationship between the two is almost the same.

There are many kinds of liquid level sensors, including input type liquid level sensor, contact type liquid level sensor and other different types. As shown in the following picture. There are photoelectric, capacitive, separated and infrared level switches.

The liquid level sensor is applicable to many electrical appliances in our life, such as toilets, coffee machines, water floaters, drinking fountains, water pumps, bathtubs, steam microwave oven water level control, water level detection, etc., so the liquid level sensor suitable for different items is also different, just like the liquid level sensor used in coffee machines and steam microwave oven water level control will be different. And even if the same items use different level sensor blades. For example, whether the water tank control of the steam microwave oven is fixed, and whether the water tank can be taken out. If the water tank can be taken out, the liquid level switch used for the water level control of the steam microwave oven must not be integrated, so each product detail will affect the condition of the sensor.