Advanced Two Wire Industrial Automation Ultrasonic Liquid Level Meter

The two-wire ultrasonic level meter is an instrument used to measure the level of liquid or solid materials. It is usually used in industrial automation, material monitoring and environmental management. Its working principle is to use the time difference of ultrasonic wave propagation in the medium to determine the liquid level. The device calculates the height of the liquid or the accumulation height of the material by emitting ultrasonic signals and receiving reflected signals.

Main features:

1. **Two-wire design**:

- Unlike traditional four-wire or three-wire level meters, the two-wire ultrasonic level meter uses two cables for connection: one cable for power supply and the other for signal transmission. The cable wiring and wiring are simpler, which can reduce installation and maintenance costs.

2. **High accuracy and high stability**:

- The level meter has high measurement accuracy and stability, and is suitable for various liquid level detection requirements.

3. **Contact-free measurement**:

- Because the measurement is carried out by ultrasonic wave, the liquid or material can be prevented from contacting the sensor, reducing the maintenance requirements caused by material corrosion, scaling and other problems.

4. **Wide Application**:
- Two-wire ultrasonic level meter can be widely used in level measurement, especially for corrosive liquid, sewage treatment, tank level monitoring, chemical storage and other fields.

5. **Strong Anti-interference Ability**:
- The device is designed with electromagnetic interference problems in industrial sites in mind, and usually has strong anti-interference ability and can work normally in complex environments.

6. **Alarm and Remote Monitoring**:
- Many two-wire ultrasonic level meters have liquid level alarm function, which can send out signals in time to remind operators to deal with it. At the same time, modern versions of level meters also support remote monitoring, which is convenient for remote management and control.

Working Principle:
- Two-wire ultrasonic level meter uses the propagation principle of ultrasonic wave for measurement. When the device transmits an ultrasonic signal, the signal propagates to the liquid surface or material surface and is reflected back. The height of the liquid level is calculated based on the time taken for the ultrasonic wave to be transmitted and received, combined with the sound velocity. The sound velocity changes according to the temperature, pressure and dielectric constant of the medium, so it is usually necessary to compensate for these factors to improve the measurement accuracy.

Advantages:
- **Low cost**: The two-wire design reduces the complexity of installation and wiring, thereby reducing overall costs.
- **Easy installation**: The two-cable connection method makes installation easier than traditional four-wire devices.
- **Remote adjustment**: Many two-wire ultrasonic level meters can support remote adjustment and configuration, which is convenient for on-site operation.
Applications:
- **Water industry**: Used for liquid level monitoring during sewage and wastewater treatment.
- **Petrochemical**: Liquid level measurement in oil tanks and chemical storage tanks.
- **Food and beverage**: Suitable for storage and level control of liquid food and beverages.
- **Environmental protection industry**: Monitor liquid level changes in different treatment pools.

Notes:
1. **Environmental factors**: The measurement of ultrasonic level meters may be affected by environmental factors such as temperature, humidity and pressure, and requires proper calibration.
2. **Reflective surface**: The liquid surface should be smooth. Foam, steam, etc. may affect the reflected signal and cause measurement errors.
3. **Obstacles**: The ultrasonic transmitter and receiver of the level meter should be protected from dirt or sediment, otherwise the measurement accuracy will be affected.

The advantages of the two-wire ultrasonic level meter are its simple wiring and low cost, but it is also necessary to consider the above environmental factors and limitations in actual use to ensure accurate measurement.

 
 Description

Ultrasonic liquid level gauge is a digital liquid level instrument controlled by a microprocessor. In the measurement, the ultrasonic pulse is emitted by the sensor (transducer). The sound wave is reflected by the liquid surface and is received by the same sensor or ultrasonic receiver. It is converted into an electrical signal through a piezoelectric crystal or magnetostrictive device, and is transmitted and received by the sound wave. time to calculate the distance from the sensor to the surface of the liquid being measured. Due to the non-contact measurement, the measured medium is almost unlimited and can be widely used to measure the height of various liquid and solid materials.

Multi-pulse low-voltage multi-point transmitting circuit, double-balanced noise suppression multi-point receiving circuit
It improves the reliability of the instrument, solves the problem of inaccurate measurement of uneven material levels, and greatly enhances the anti-interference ability, allowing it to work stably near the transmission tower of the substation.
Automatic power adjustment, gain control, temperature compensation.
Yingling's detection technology and rich software functions are suitable for various complex environments.
Waveform calculation technology improves the measurement accuracy of the instrument.
The interference echo suppression function ensures the authenticity of the measurement data.
16-bit D/A conversion improves the accuracy and resolution of current output.
The sensor is made of tetrafluoroethylene material and can be used in various corrosive situations.
Multiple output forms: programmable relay output, high-precision 4-20mA current output, Rs-485 digital communication output, split ultrasonic liquid level probe.
 

Specification

Main parameters of integrated ultrasonic liquid level meter​

Main parameters of corrosion-resistant sensor housing type split-type ultrasonic liquid level meter

Technical indicators

Installation principle
When the ultrasonic liquid level meter is working, high-frequency pulse sound waves are emitted by the transducer (probe) and are reflected by the surface of the measured object (water surface). The refracted reflected echo is received by the same transducer (probe) and converted into an electrical signal. . The time between pulse transmission and reception (the movement time of the sound wave) is proportional to the distance from the transducer to the object surface. The relationship between the sound wave transmission distance S, the sound speed C and the transmission time T can be expressed by the formula: S= CⅩT /2
When installing an ultrasonic liquid level meter, the blind zone problem of the ultrasonic liquid level meter must be considered. When the liquid level enters the blind zone, the ultrasonic transmitter cannot measure the liquid level. Therefore, when determining the measuring range of the ultrasonic liquid level meter, a margin of 50 cm must be left. When installing, the transmitter probe must be higher than the maximum liquid level. The position is about 50 centimeters. Only in this way can the accurate monitoring of the liquid level and the safety of the ultrasonic liquid level meter be ensured.
In actual use, due to poor installation considerations, the liquid level gauge was submerged in water, causing the liquid level gauge to be completely damaged.
Features of SGM ultrasonic level meter
Low price, small size and light weight, it can be used for non-contact level measurement of liquids and bulk solids in food, chemical, semiconductor and other industries, and can be used for remote level monitoring and pump control.
Attention should be paid to mechanical installation: the installation should be perpendicular to the surface of the object to be measured, avoid being used to measure foam objects, and avoid being installed at a distance less than the blind zone distance from the surface of the measured object (blind zone: each product will have a standard, which will be known with the product) , it should be considered that the beam avoids blocking materials and does not meet the filling mouth and container wall. When detecting large solid objects, the probe orientation should be adjusted to reduce measurement errors.

Catalog

Packing & Delivery


FAQ
1. Q: What information need to be provided to choose the suitable model?
A: Application field, Nominal pressure ,Medium & medium temperture , Power supply , Output,
Flow range, Accuracy, Connection and other parameters.
2. Q: Are you a trade company or a manufacturer?
A: We are an ISO approved manufacturer specialized in level and flow measuring instruments.
OEM & ODM service are available. Welcome to visit us in China.
3. Q: What is your MOQ?
A: To start our cooperation, sample order is acceptable.
4. Q: What is your delivery date for the Intelligent Mini Micro Turbine Fuel Oil Diesel Flow Meter?
A: The delivery date is about 3-15 working days after receipt of payment.
5. Q: What is your payment terms?
A: We support T/T, PayPal ,Western Union.
For mass production order, it is 30% deposit in advance and 70% balance before shipment.
6. Q: Do you have a warranty for the Flow Meter?
A: Yes, we have the warranty of 12 months.