Comparison of externally attached liquid level switch and connecting rod float level switch

Liquid level switch, also known as water level switch, liquid level sensor, as the name suggests, is a switch used to control the liquid level. From the form, it is mainly divided into contact type and non-contact type. Non-contact switches include externally posted liquid level switches and contact-type float level switches. The connecting rod float level switch is a simple structure, easy to use, safe and reliable level controller. It uses one or more magnetic induction elements installed in a closed non-magnetic tube, and then passes the tube through one or more hollow float balls with annular magnets inside. The rise or fall of the liquid level will drive the float balls to move together. , so that the magnetic induction element in the non-magnetically conductive tube can be pulled in or disconnected, and a switch signal is output. The float type liquid level switch uses magnetic operation, no mechanical connection parts, and the operation is simple and reliable. When the float switch is floated by the measured medium, the float drives the main body to move, and the magnet at the other end of the float will control the magnet on the switch action lever. Technical advantages of float level switches: float switches do not contain bellows, springs, seals and other components that cause failures. Instead, a straight float is used to drive the internal magnet of the switch, and the simple lever of the float switch makes the switch act instantly. The float cantilever angle limit design prevents the float from being vertical. In a closed metal or plastic tube, design one or more magnetic induction elements, and then pass through one or more hollow floating rings with ring magnets inside, and use the fixed ring to control the floating ball and the magnetic induction elements. At the relevant position, make the float float up and down within a certain range. The magnet in the float ball is used to attract the contacts of the magnetic induction element, and the action of opening and closing is generated to control or indicate the liquid level. The disadvantage of this liquid level switch is that it needs to be installed in a clear tank, and it also needs to open holes on the tank body, which is cumbersome and time-consuming to install. There are also requirements for the tank during installation. The sonar pulse generated by the externally mounted liquid level switch sensor (probe) can pass through the container wall, the pulse will propagate through the container wall and the liquid, and will be reflected back. Through the detection and calculation of this reflection characteristic, it can be judged whether there is liquid in the container at the monitoring point. At the same time, the liquid level switch can output relay signals to the back-end electrical appliances or other equipment, so as to realize the monitoring or control of the liquid level. Shaanxi Kaidi externally mounted liquid level switch can achieve accurate measurement with only one probe. Non-contact measurement of liquid level, safety When measuring storage tanks that are toxic, corrosive, pressurized, flammable, explosive, volatile, and prone to side leakage, the sonar sensor (probe) is attached to the tank wall, and no valve is used. , Connecting pipes, joints, no need to open holes, no contact with the liquid and gas in the tank, very safe. Installation and maintenance are convenient. During installation and maintenance, the cans are not opened, the cans are not clear, and the production is not affected. Online debugging is convenient, especially suitable for situations where there is danger and it is not suitable to open the cover, which reduces the difficulty of debugging. One-click calibration to complete the calibration. Most of the spherical spherical tanks, horizontal tanks, vertical tanks and process tanks can be measured and installed. It is easy and highly intelligent, and the on-site installation and debugging work is greatly reduced to realize fool-like installation. Fault relay output When the probe fails or the instrument fails, the fault signal will be output through the fault relay to ensure the safety of production and operation. The real-time temperature calibration can measure the temperature of the tank wall in real time and perform a certain degree of temperature compensation. Temperature data can be displayed locally or transmitted remotely to the control room.
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