Q: What are the different types of level sensors?

Types of Level Transmitters : Level measurement transmitters are of seven types. Each type of transmitter works in a different way, and makes it useful for different types of processes. Capacitance Level Transmitters Hydrostatic Level Transmitters Magnetic Level Transmitters Radar Fill Level Transmitters MUltrasonic Level Transmitter Guided Microwave Level Transmitters Hydrostatic level transmitters

Question 1

What is RF admittance?

Accepted Answer

Radio frequency admittance is a new type of level control technology with wider applicability developed from capacitive type. It is an upgrade of capacitive level technology. The so-called radio frequency admittance, the meaning of admittance is the reciprocal of impedance in electricity. It is composed of resistive components, capacitive components, and inductive components. The radio frequency is the high-frequency radio spectrum. So the radio frequency admittance can be understood as using high frequency Radio wave measurement admittance.
When the meter is working, the sensor of the meter forms an admittance value with the tank wall and the measured medium. When the level changes, the admittance value changes accordingly. The circuit unit converts the measured admittance value into a level signal output to realize level measurement.

Question 2

What is RF level sensor?

Accepted Answer

RF level sensor adopts advanced RF admittance technology. It overcomes the defect that the capacitive level meter cannot eliminate the influence of the conductive hanging material.

It is not affected by water vapor, dust or condensation, and has the advantages of stable and reliable long-term operation, high sensitivity, good linearity, high temperature resistance, and high pressure resistance.

It can be used for liquid level (level) measurement of liquid, oil and solid measurement, without moving parts.

Question 3

What is RF type level switch?

Accepted Answer

The RF type level switch realizes the level measurement and control by sensing the change of reactance (capacitive reactance and impedance) between it and the tank body.

The internal electronic unit, the reactance between the probe measuring pole and the empty tank together form a balanced bridge circuit and generate a stable oscillating signal.

When the measured medium covers the probe measuring pole, the reactance change between the probe measuring pole and the tank will cause the bridge circuit to be unbalanced and stop generating oscillating signals. The post-stage circuit detects this change and outputs an alarm signal.

The oscillating signal is applied as a radio frequency signal at the same time as the probe's measuring pole. It is also sent to the protection pole of the probe after passing through a 1:1 voltage follower. The radio frequency signals of the measuring electrode and the protection electrode have the same potential, the same phase, the same frequency and are isolated from each other.

When the probe is hung with material, there is no potential difference between the measuring electrode and the guard electrode to form electrical isolation to ensure that the signal change of the guard electrode does not affect the detection. The change of the reactance on the probe measuring pole can only be determined by the material between the probe measuring pole and the tank. So that the hanging material on the probe will not affect the normal detection.

Question 4

What are the different types of level sensors?

Accepted Answer

Types of Level Transmitters:
Level measurement transmitters are of seven types. Each type of transmitter works in a different way, and makes it useful for different types of processes.
Capacitance Level Transmitters
Hydrostatic Level Transmitters
Magnetic Level Transmitters
Radar Fill Level Transmitters
MUltrasonic Level Transmitter
Guided Microwave Level Transmitters
Hydrostatic level transmitters

Question 5

What does a level sensor do?

Accepted Answer

The main function of the liquid level sensor is to detect the liquid level. The functions that can be implemented include water shortage protection, no water alarm, waterproof overflow, high liquid level reminder, etc.
The liquid level sensor is used to detect the liquid level, and it is determined that the liquid level needs to be controlled at the position. Then the liquid level sensor is installed in the corresponding position.
For example, the liquid level at the bottom of the container needs to be measured, and a signal reminder needs to be given when no liquid is detected.
Then when the container is in a liquid state, the sensor works normally. When the liquid level drops to a low level, the liquid level sensor will give a signal reminder or alarm when it detects this industrial control change.

Year: 2020

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