Do You Know How Many Common Types of Level Gauges?(1/3)

 DO YOU KNOW HOW MANY COMMON TYPES OF LEVEL SENSORS?

 

We will elaborate on the common types of liquid level meters and their principles in the following article, which are divided into three chapters. And today we will talk about the first chapter.

 

Common Types of Level Sensors:

Magnetic Flip Plate Level Gauge; Float Ball Level Meter; Steel Strip Level Gauge; Radar Level Gauge; Magnetostrictive Level Transmitter; Radio Frequency Admittance Transmitter; Tuning fork level Gauge---Chapter 1.

Glass Plate Level Gauge (Glass Tube Level Gauge); Pressure Level Transmitter; Capacitive Level Gauge; Intelligent Electric Float Level Gauge; Buoy Level Gauge; Float Level Transmitter---Chapter 2.

Electric Contact Level Gauge; Magnetic Sensitive Electronic Two Color Level Meter; External Level Gauge; Hydrostatic Level Transmitter; Ultrasonic Level Sensor; Differential Pressure Level Gauge(Double Flange Level Transmitter)---Chapter 3.

CHAPTER 1:

Magnetic Flip Plate Level Gauge：

The principle of Magnetic Flip Plate Level Gauge: Connector principle, developed based on the buoyancy principle and magnetic coupling. When the liquid level in the measured container rises and falls, the permanent magnetic steel in the float is transferred to the magnetic tilting column indicator panel through magnetic coupling, so that the red and white tilting column turns over 180°. When the liquid level rises, the tilting column turns from white to red, and when the liquid level drops, the tilting column turns from red to white. The red and white junction on the panel is the actual height of the liquid level in the container, so as to realize the liquid level display.

 

Float Ball Level Meter:

The structure of Float Ball Level Meter is mainly designed and produced based on the principle of buoyancy and static magnetic field. The position of the float with a magnet (referred to as the float) in the measured medium is affected by the action of buoyancy: the change in the liquid level causes the change in the position of the magnetic float. The magnet in the float and the sensor (magnetic reed switch) act to change the number of components (such as fixed resistance) connected to the circuit, and then change the electrical quantity of the instrument circuit system. That is, the change in the position of the magnetic float causes a change in the electrical quantity. The liquid level in the container is reflected by detecting the change of electrical quantity.

 

Steel Strip Level Gauge:

It is designed and manufactured by the principle of mechanical balance. When the liquid level changes, the original mechanical equilibrium will reach a new equilibrium through the movement of the steel strip under the disturbance of the float by the buoyancy. The liquid level detection device (float) drives the steel belt to move according to the liquid level, and the displacement transmission system drives the transmission pin to rotate through the movement of the steel belt, and then acts on the counter to display the liquid level.

 

Radar Level Gauge:

Radar level gauge is a measuring instrument based on the time travel principle. Radar waves run at the speed of light, and the running time can be converted into level signals through electronic components. The probe emits a high-frequency pulse and propagates along the cable probe. When the pulse encounters the material surface, it is reflected back and received by the receiver in the instrument, and the distance signal is converted into a material level signal.

 

Magnetostrictive level Transmitter:

When the sensor of the magnetostrictive level gauge is working, the circuit part of the sensor will stimulate a pulse current on the waveguide wire. When the current propagates along the waveguide wire, a pulse current magnetic field will be generated around the waveguide wire. A float is provided outside the sensor measuring rod of the magnetostrictive level gauge, which can move up and down along the measuring rod as the liquid level changes. There is a set of permanent magnetic rings inside the float. When the pulsed current magnetic field meets the magnetic ring magnetic field generated by the float, the magnetic field around the float changes, so that the waveguide wire made of magnetostrictive material generates a torsional wave pulse at the position of the float. This pulse is transmitted back along the waveguide wire at a fixed speed and detected by the detection mechanism. By measuring the time difference between the pulse current and the torsional wave, the position of the float, that is, the position of the liquid level, can be precisely determined.

 

RF Admittance Level Transmitter:

The Radio Frequency Admittance Level Meter consists of a sensor and a control instrument. The sensor can be installed on the top of the silo using a rod, coaxial or cable probe. The pulse card in the sensor can convert the level change into a pulse signal and send it to the control instrument. The control instrument converts it into an engineering data after calculation and processing, thus realizing continuous measurement of the level.

 

Tuning Fork Level Sensor:

The working principle of the tuning fork level controller is to make the tuning fork vibrate at a certain resonant frequency through a pair of piezoelectric crystals installed on the tuning fork base. When the tuning fork comes into contact with the measured medium, the frequency and amplitude of the tuning fork will change, and these changes will be detected, processed and converted into a switch signal by the intelligent circuit.

TO BE CONTINUED

Level Sensors' Manufacturer. OEM/ODM

Email:felix@cnbc-sensor.com; Whatsapp:+8618161903310