An ultrasonic level gauge is a non-contact liquid level measuring instrument. It utilizes the propagation characteristics of ultrasonic waves in air, calculating the liquid level height by measuring the time difference between the emission and return of the ultrasonic wave. Here are some practical tips for using ultrasonic level gauges:
1. Choosing the Right Ultrasonic Level Gauge
Consider the Measurement Environment: Select a suitable ultrasonic level gauge based on the properties of the liquid being measured (e.g., corrosiveness, viscosity), temperature, pressure, and other parameters. For corrosive liquids, choose an ultrasonic level gauge with corrosion resistance.
Accuracy and Range: Select the appropriate measurement accuracy and range according to actual needs. For example, the Uson series ultrasonic level gauges offer multiple range options such as 5 meters, 10 meters, and 15 meters, suitable for different scenarios.
2. Correct Installation
Location Selection: The gauge should be installed 0.5-1.0m above the measuring point, neither too close nor too far from the vertical wall of the container. Avoid installation in areas with strong vibrations, strong magnetic field interference, foam, or mist, as well as at inlets or outlets.
Installation Angle: When the measured medium is a conductor or corrosive gas, the installation angle should be greater than 45°.
Installation Height: Set the distance from the emitting surface of the sensor probe to the bottom of the container according to actual needs.
3. Debugging and Calibration
Debugging: After installation, debugging is required to ensure measurement accuracy. Adjust the positions of the transmitting and receiving heads to ensure smooth ultrasonic wave return. Adjust instrument parameters such as temperature and pressure according to actual conditions.
Calibration: Includes 4mA calibration, 20mA calibration, range calibration, sound velocity calibration, and temperature calibration. Perform calibration according to the steps in the product manual to ensure measurement accuracy meets requirements.
4. Daily Maintenance
Regular Inspection: Regularly check the appearance and fasteners of the ultrasonic level gauge for normal operation. Keep the instrument clean to avoid the influence of dust and dirt on measurement results.
Maintain Measurement Environment: Ensure the measurement environment is clean and dry, avoiding strong vibrations and impacts to prevent affecting measurement accuracy and service life.
Corrosion Prevention Measures: For corrosive liquids, regularly check the corrosion resistance of the ultrasonic level gauge and replace or maintain it as necessary.
5. Precautions
Avoid Interference: During installation and commissioning, avoid running wiring in the same conduit as other unrelated equipment to prevent mutual interference.
Range Setting: Set the output values for the low and high range according to actual measurement needs.
Measurement Mode: Select distance mode or level mode as needed.
6. Application Scenarios
Ultrasonic level gauges are widely used in various liquid storage and transportation applications, such as storage tanks, troughs, pools, wells, canals, metering boxes, grain silos, and material bins. Their high precision, high stability, and non-contact measurement characteristics make them the preferred tool for level measurement in many industries.
7. Case Analysis
In municipal pumping systems, the ARTang non-contact ultrasonic level sensor effectively prevents interference from various agitations, ensuring normal operation. Simultaneously, in the handling of corrosive liquids such as NaOH, the non-contact sensor can provide detailed measurement data, avoiding the problem of traditional contact sensors being affected by corrosion.
Conclusion
As a high-precision and high-stability level measurement instrument, the ultrasonic level gauge is not complicated to use. As long as you master the correct methods and precautions, you can easily use an ultrasonic level gauge to measure various liquid levels.