What is the principle of float level switch? Float water level switch use

Measuring principle: The float switch uses magnetic force to operate, and the inorganic mechanical connection is simple and reliable to operate. When the float switches the floating float of the measured medium, the float drives the main body to move, and the magnet at the other end of the float switches the magnet on the control lever at the same time.

It should be noted that the high liquid level and other switches have a high working temperature, so that the water temperature inside is also high, and the density of high temperature water is less than the density of indoor warm water, so that the action line of room temperature water is lower than that of the switch identification line, and the low liquid level alarm is connected to the normally closed (NC), and the liquid level is high and normally open (NO).

Uses: Mainly used for liquid level detection.

The application of energy point photoelectric and capacitive type will be better than float, because float is easy to produce scale and easy to stuck.

The photoelectric water level sensor is small in size, easy to install, has little impact on the liquid to be measured, has fast response speed, and accurate liquid level control. There are no mechanical moving parts inside the photoelectric sensor, so the sensor has the characteristics of high reliability, long life and maintenance-free. The non-contact capacitive water level sensor does not affect the liquid and can be used to detect the level of the disinfectant.

1. Introduction to the switch of float level.

Technical advantages of float level switches: Float switches do not contain bellows, springs, seals, etc., which 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 move instantaneously.

The float cantilever angle limit design prevents the float from being vertical. The float level switch is a simple structure, easy to use, safe and reliable liquid level controller. It is faster than general mechanical switching speed and long working life; Compared with electronic switches, it has the characteristics of strong resistance to load impact, and one product can achieve multi-point control.

It has been widely used in shipbuilding, papermaking, printing, generator equipment, petrochemical industry, food industry, water treatment, electrical, dye industry, hydraulic machinery, etc. Float switch is a simple structure, easy to use, safe and reliable level control device, it has a smaller size, faster speed, longer service life than general mechanical switches, compared with electronic switches, it has the characteristics of strong load impact resistance.

Second, the principle of float level switch.

The magnetic float of the float level switch is used to rise or fall with the liquid level, so that the sensor detects the action of the reed switch chip at the set position in the tube, and sends out the contact open (off) conversion signal.

One or more reed tubes are installed in a closed non-magnetic tube, and then the tube is passed through one or more hollow floats with ring magnets inside, and the rise or fall of the liquid will drive the floats to move up and down together, so that the reed switches in the non-magnetic conductive tubes can produce an action of engaging or disconnecting, so as to output a switching signal.

Third, the main features.

It has a wide range of applications and various installation forms.

Multi-point control. Passive components, stable and reliable performance, strong anti-interference ability, simple structure, easy installation, low maintenance cost.

A variety of materials can be selected, suitable for a variety of occasions.

The float water level switch works as follows:

Liquid has buoyancy, and the float system (generally has the corresponding auxiliary equipment) is made according to the buoyancy of the liquid, when the liquid level, the float system is also corresponding, the same when the liquid level falls, it also drops accordingly, when the float or falls to the set position, the float system will touch the travel switch (or other microelectronic equipment) at the set position, so that the travel switch sends out an electrical signal, and the electronic control equipment will act immediately when receiving the electrical signal, cut off or turn on the power supply, and form an automatic control system.

Basically, it is a reed tube structure, with a movable float on the outside and a magnet on the inside. When the magnet is buoyant and approached to the reed, the contacts in the reed switch are turned on or off. The principle of a reed transistor is that the same magnetic pole repels each other, and the different magnetic poles attract.

The switch control of the reed switch in the liquid level switch controls the corresponding operating mechanism, which constitutes a complete set of circuits.

Usage:

The stainless steel float level switch is specially used for the liquid level detection, signal remote transmission, and switch alarm of various small and medium-sized atmospheric pressure and pressurized liquid storage tanks, and can be used for all kinds of hygienic, environmentally friendly, toxic, and corrosive medium-liquid with concentrated acid and alkali.

Stainless steel conventional models are: SS45i, SS80L, SS125i, SL2 and other models are customized according to requirements. The installation forms are divided into: top installation, bottom installation, and side installation.

Relationship between the properties of the liquid medium and the float:

1.When the specific gravity of the liquid is different, the action position of the float will change, and the part of the float immersed in the liquid will be relatively more when the SG is smaller than the water.

2.The reference specific gravity of the float switch product is water (SG=1), so the specific gravity of the liquid level SG must be considered when using the float, which must be greater than that indicated by the float specification, otherwise, the float switch cannot float.

3.For liquids with high viscosity that will not dry up, stainless steel floats with large outer diameters should generally be selected.

4.The float switch uses a magnet to sense the reed switch, so the measured liquid level should be free of iron filings, otherwise the iron filings stick to the float and the float cannot float, which will affect the action of the float switch.

1. Working principle: The float level switch is basically a reed tube structure, with a movable float on the outside and a magnet inside the ball. When the magnet is buoyant and approached to the reed, the contacts in the reed switch are turned on or off.

2. The principle of the reed switch is that the same magnetic pole repels each other, and the different magnetic poles attract. The switch control of the reed ruler in the liquid level switch controls the corresponding operating mechanism, which constitutes a complete set of circuits.

Introduction: Shenda 1. The float level gauge is composed of floats, plug-in rods, etc.;

2. The float level gauge is installed on the top of the container through the connecting flange, the float floats on the liquid surface according to the principle of discharging the liquid volume phase and so on, when the liquid level of the container changes, the float also moves up and down with it, due to the magnetic effect, the dry spring of the float level gauge is magnetically engaged, the liquid level position changes into an electrical signal, the actual position of the liquid is displayed by the display instrument with numbers, and the float level gauge achieves the remote detection and control of the liquid level;

3. Technical advantages of float level gauge: float level gauge has the characteristics of simple structure, convenient debugging, good reliability and high precision;

4. The float level gauge can be widely used for continuous measurement of liquid level of high temperature, high pressure, viscous, dirty medium, asphalt, wax-containing oil, flammable, explosive, corrosive and other media.

1. The side-mounted float level switch is an accessory installed on the side of the water tank or fuel tank to detect the liquid level and output signal.

2. The production method and structural principle are the same as those of the direct-mounted float level switch: in the closed metal or plastic pipe, design one or more points of the reed switch, and then run through one or more tubes, hollow and equipped with a ring magnet floating ring, and use the fixed ring to control the float and the reed switch in the relevant position, so that the float float floats up and down within a certain range.

3. For users who use side-mounted float level switches for the first time, the most important thing to solve is the problem in the circuit. How to realize the production of a complete set of circuits, so as to automatically add water to the water tank and stop the water. And in the production process, as long as we can understand the principle of the side-mounted float liquid potato slider switch.