Selection of FMU41-ARB2A2 Ultrasonic Level Gauge

Selection of FMU41-ARB2A2 Ultrasonic Level Gauge

Choosing a suitable ultrasonic level gauge requires comprehensive consideration of multiple factors to ensure stable and accurate operation of the equipment in practical applications. The following are specific steps and suggestions:

1、 Clearly define measurement requirements

measurement range

Determine the range based on the actual liquid level height, and it is usually recommended to set the range to 1.5 times the actual liquid level height (such as 0-3 meters for liquid level, choose a 5-meter range).

Attention should be paid to blind spot parameters, for example, a liquid level gauge with a blind spot of 0.3 meters cannot measure liquid levels below 0.3 meters.

Accuracy requirements

Select accuracy based on application scenarios, such as sewage treatment requiring ± 0.25% FS, and municipal drainage monitoring accepting ± 1% -2% FS.

Liquid level change speed

In scenarios where liquid level changes rapidly, models with fast response times should be selected.

2、 Evaluate the working environment and medium characteristics

working environment

The temperature, pressure, and humidity must comply with the equipment parameters (such as the working temperature range of -20 ℃ to+60 ℃).

It is recommended to choose a split type liquid level gauge for high temperature and high pressure environments to avoid damage to electronic components caused by high temperatures.

medium characteristics

Clean water, oil and other non foam media are suitable for common models; Low frequency models (20-50kHz) shall be selected for foam rich media such as sewage and mud.

High frequency models (60-100kHz) are required for powders, solid particles, and other media, ensuring that there are no large amounts of bubbles or particles on the surface of the media.

3、 Select appropriate equipment parameters

Frequency and Beam Angle

The higher the frequency, the smaller the beam angle, and the higher the measurement accuracy, but it is easily affected by the environment.

Balance accuracy and environmental adaptability according to actual needs.

Probe material

The probe materials mainly include ABS and PVDF, and corrosion-resistant and high-temperature resistant materials should be selected according to the characteristics of the medium.

Installation method

Integrated installation is simple and suitable for ordinary working conditions; Split type can be installed remotely, suitable for high temperature, high pressure, and corrosive environments.

4、 Match output signal with interface

output signal

4-20mA analog signal has strong compatibility and is suitable for traditional PLC systems; RS485 digital signals have strong anti-interference capabilities and are suitable for the Internet of Things and smart factories.

interface type

Select the appropriate interface type based on the control system, such as RS485, 4-20mA, etc.

5、 Consider protection level and explosion-proof performance

Protection level

Select the protection level (such as IP65, IP68) according to the environment to ensure the device's resistance to environmental factors.

Explosion proof performance

Explosion proof level gauges should be selected for flammable and explosive environments to ensure safe operation.

after-sales service

Ensure that suppliers provide professional after-sales service and technical support, including regular maintenance and calibration.

7、 Comprehensive cost and budget

cost performance

Choose products with high cost-effectiveness while meeting actual needs.

long-term cost

Consider the maintenance cost, calibration frequency, and service life of the equipment.

8、 Selection Example

Small pool/tank

Range 0-3 meters, blind spot ≤ 0.3 meters, accuracy ± 1% FS, ordinary ultrasonic level gauge.

Chemical storage tank/sewage tank

Range 5-8 meters, blind spot ≤ 0.5 meters, accuracy ± 0.5% FS, low-frequency ultrasonic level gauge.

High level water tower/large container

Range 12-20 meters, blind spot ≤ 1 meter, accuracy ± 0.25% FS, high-frequency ultrasonic level gauge.

Selection of FMU41-ARB2A2 Ultrasonic Level Gauge

9、 Guide to Avoiding Pits

Avoid blind spot interference

Ensure that the liquid level is always above the blind spot, otherwise it cannot be accurately measured.

Avoid medium interference

Low frequency or corrosion-resistant models shall be selected for media with many foam and strong corrosivity.

Avoid environmental interference

Models with high protection levels and strong anti-interference capabilities should be selected for strong electromagnetic fields and high temperature and high pressure environments.

Common models for Hubei Airlines:

SGF/T-37N

SGF/T-370

SGF/T-39N

SGV/B-38N

SGP/A-370