Selecting the correct ultrasonic level meter is critical for ensuring accurate measurement, stable operation, and long-term reliability. Aister ultrasonic level meters are widely used in water treatment, chemical processing, storage tanks, and industrial automation due to their high cost-performance ratio, stable performance, and flexible configuration.

However, choosing the right model requires more than just selecting a measurement range. The correct approach is to match the model to the application conditions, medium characteristics, and installation environment.

This guide explains how to select the right Aister ultrasonic level meter step by step, helping engineers and buyers quickly identify the most suitable configuration.

1. Identify Core Models and Key Technical Parameters

The first step in selection is understanding the main product series and fundamental specifications.

Aister’s mainstream ultrasonic level meters mainly include:

• ATDS Series – Standard industrial models for most applications

• ATUL Series – Extended measurement range models for large tanks and reservoirs

Measurement Range and Blind Zone

Choosing the correct measuring range ensures stable operation and avoids measurement failure.

Recommended rule:
Actual maximum level × 1.2–1.5 safety margin

Important tip:
The distance between the sensor and the minimum liquid level must always be greater than the blind zone.

Accuracy and Resolution

Different applications require different accuracy levels.

Typical resolution for the ATDS series is:

• 3 mm or 0.1% of range (whichever is greater)

This level of precision is sufficient for most industrial liquid level monitoring applications.

2. Consider Medium Characteristics

The type of liquid being measured determines the appropriate sensor material and functional configuration.

Corrosive Media

Temperature and Pressure

Standard operating conditions:

• Temperature: -20°C to 60°C

• High temperature option: up to 80°C

• Pressure: ≤ ±0.1 MPa

Applications exceeding these limits usually require customized configurations.

Special Media Conditions

Certain liquids may affect ultrasonic signal reflection.

Recommended solutions include:

• Foam or suspended solids: models with intelligent echo filtering

• Sticky or viscous liquids: narrow beam sensors with anti-adhesion coating

• Agitated liquids: advanced echo analysis algorithms

3. Evaluate Installation and Environmental Conditions

Installation environment directly affects measurement stability.

Installation Methods

Top mounting
The most common installation method. The sensor must be positioned vertically and away from obstacles.

Side mounting
Suitable when top installation space is limited or for horizontal tanks.

Split-type installation
Sensor and transmitter are separated. Ideal for:

• High temperature environments

• Strong electromagnetic interference areas

• Confined spaces

Environmental Protection Requirements

Industrial environments may require enhanced protection.

Protection level

• Outdoor or humid environments: IP65 or higher

• Aister ATDS models: IP66 / IP67

Electromagnetic interference

• Keep distance from inverters and high-power motors

• Use shielded cables when necessary

Explosion-proof environments

Hazardous areas (Zone 0 / Zone 1) require certified explosion-proof models such as:

• Ex d IIC T6 flameproof versions

• ATEX certified options

4. Select Output Signals and Smart Functions

Different control systems require different signal outputs.

Standard Output Options

Wireless communication is particularly useful for:

• Remote reservoirs

• Agricultural water systems

• Distributed pumping stations

5. Application-Based Model Recommendations

Choosing based on industry scenarios can significantly simplify the selection process.

6. Common Installation Mistakes to Avoid

Even the best ultrasonic level meter can produce inaccurate readings if installed improperly.

Key precautions include:

• Avoid installation directly above inlet pipes or agitators

• Prevent obstacles within the ultrasonic beam path

• Avoid choosing excessively large measurement ranges

• For closed tanks with vapor or pressure, consider guide tubes or specialized sensors

• For foam or vapor environments, select intelligent echo processing models

Proper installation significantly improves measurement accuracy and long-term stability.

7. Quick 5-Step Selection Process

A simplified workflow for selecting the right Aister ultrasonic level meter:

1. Measure maximum liquid level, temperature, and medium properties

2. Determine the required measuring range and accuracy

3. Choose the appropriate sensor material

4. Confirm installation conditions and protection level

5. Select output signals and additional functions

Following these steps helps ensure the instrument is technically compatible with the application.

Conclusion

A properly selected ultrasonic level meter improves measurement accuracy, reduces maintenance costs, and ensures reliable process control.

Aister ultrasonic level meters provide a flexible range of models, sensor materials, and communication options, making them suitable for applications ranging from small tanks to large industrial reservoirs.

If you need professional advice or product recommendations, feel free to contact us anytime.