Tag: level sensor

There should be no obstacles in the area radiated by the emitted ultrasonic beam between the emitting surface of the ultrasonic liquid level sensor probe and the surface of the medium to be measured. Therefore, the installation should be avoided as far as possible from the internal facilities, such as brackets, on-site equipment and so on. When installing the level sensor, the sensor must be kept at a certain distance from the tank wall, and the transmission direction of the transducer should be perpendicular to the liquid surface as much as possible.

Float switch: When the float liquid level switch floats according to the rise and fall of the float ball with the rise and fall of the liquid level, the magnet in the float ball attracts the contacts of the reed switch to generate the action of opening and closing, and then gives the on-off signal. Capacitive level sensor: The capacitive liquid level sensor determines whether there is liquid by detecting the conductivity or insulation rate of the medium. It can be simply understood as judging whether there is water or no water according to the change of the detected capacitance value, and outputting high and low level signals (0 and 1 digital signals).

In the automated production process of industries such as food and beverages, daily chemicals, medicine, semiconductors, etc., in order to ensure the consistency of product quality, the era of direct manual monitoring and intervention in the production process has gone. Liquid level measurement and monitoring are playing an increasingly important role. It can be said that the measurement and monitoring of the liquid level directly affects the quality of the product, and even whether the production process can be carried out smoothly.

A liquid level sensor is a device used to monitor, maintain and measure the level of liquids (and sometimes solids). Once the liquid level is detected, the sensor converts sensed data into an electrical signal. The main types of liquid level sensors are ultrasonic liquid level sensors, capacitive liquid level sensors, photoelectric liquid level sensors, microwave optical sensors, etc., and their applications are as follows:

There are three commonly used non-contact liquid level sensors, namely capacitive liquid level sensors, ultrasonic liquid level sensors, and separate photoelectric liquid level sensors. The non-contact liquid level sensor can detect the liquid level without contacting the liquid. With this advantage, the application field of the non-contact liquid level sensor has been greatly expanded. The common feature of these three types of non-contact liquid level sensors is that they are not affected by liquid color, corrosiveness, pressure, density, etc., and because the sensor does not directly contact the liquid, it is more hygienic, and it is convenient for users to clean the container, add liquid, etc.

In level control and detection applications, the level of a tank or container will change at a continuous rate over a period of time. In order to know when a failure occurs or when levels become dangerously high or low, it is critical to have a level control monitoring solution in place to prevent costly damage and situations where water overflows or runs dry. The following mainly describes the functions of the photoelectric liquid level switch in the water tank or container.