Installation distance of JCS-04NW ultrasonic level gauge

Installation distance of JCS-04NW ultrasonic level gauge

Ultrasonic level gauges measure liquid levels by emitting ultrasonic pulses and receiving reflected waves, and their installation distance directly affects measurement accuracy and stability. The following provides a detailed explanation of the key points for controlling installation distance from four dimensions: installation height, blind spot range, obstacle interference, and environmental factors.

1、 Selection of installation height

core principle

The installation height of the ultrasonic level gauge should ensure that the distance (H) between the sound wave emission surface and the high liquid level is ≥ the blind spot distance (D), and there is a safety margin (usually recommended H ≥ D+0.5m).

Example: If the blind spot is 0.3m, the installation height should be ≥ 0.8m.

influence

Installation too low: Sound waves are easily reflected back to the sensor by the liquid level, leading to misjudgment of full range.

Installation too high: The sound wave propagation path is too long, which may cause attenuation or interference.

2、 Avoidance of blind spots

Definition of blind spots

Blind spot is an area that cannot be accurately measured after ultrasonic emission, usually located 0.2-0.5m directly below the sensor (specific values need to refer to the equipment manual).

Avoidance methods

Installation height: Ensure that the high liquid level is always below the lower limit of the blind spot.

Dynamic liquid level: If the liquid level fluctuates greatly, it is necessary to increase the installation height or choose equipment with smaller blind spots.

Example: If the blind spot is 0.3m and the liquid level fluctuation range is 0-2m, the installation height should be ≥ 2.8m.

3、 Avoidance of obstacles and interference

Installation location

Vertical installation: Prioritize vertical downward installation to reduce the deviation of sound wave reflection paths.

Avoid obstacles: Ensure that there are no pipes, stirrers, tank walls, or other obstacles on the sound path, otherwise adjust the installation angle or add a waveguide.

interference source

Avoid strong electromagnetic fields: Keep away from equipment such as motors and frequency converters to prevent signal interference.

Reduce noise: Choose models with strong anti-interference ability.

4、 Consideration of environmental factors

Temperature and pressure

High temperature environment: The speed of sound increases with temperature, and high-temperature resistant models or temperature compensation should be selected.

High voltage environment: Ensure that the equipment's withstand voltage level meets the working conditions and avoid sound wave attenuation.

medium characteristics

Medium density: sound waves attenuate rapidly in the medium (such as foam), so it is necessary to increase the transmission power or select a frequency with strong penetration.

Medium surface: Smooth surfaces have good reflection effects, while rough surfaces require an increase in installation height.

5、 Installation Example and Checklist

check itemstandard

installation heightH ≥ D + S + 0.5m

Blind spot avoidanceHigh liquid level ≤ lower limit of blind zone

Obstacle distanceThe sound wave path is unobstructed, with a distance of ≥ 0.5m

installation angleVertically downward, allowable deviation ≤± 5 °

environmental adaptabilityTemperature, pressure, and medium comply with equipment parameters

6、 Common Problems and Solutions

Large fluctuations in measurement values

Reason: Insufficient installation height, interference from obstacles, and surface fluctuations of the medium.

Solution: Increase installation height, adjust angle, and install waveguide.

full scale display

Reason: The liquid level enters the blind zone, and sound waves are directly reflected by the liquid level.

Solution: Increase installation height or choose devices with small blind spots.

Large measurement error

Reason: uncompensated temperature changes and uneven medium density.

Solution: Enable temperature compensation and calibrate equipment parameters.

Installation distance of JCS-04NW ultrasonic level gauge

7、 Summary and Suggestions

core principle

Above blind spots, outside obstacles, environment adaptation ": Ensure installation height, avoid blind spots, and adapt to the environment.

tool

Accurately measure the installation height using a laser rangefinder.

Verify through simulation testing that there is no interference in the sound wave path.

Maintenance Recommendations

Regularly check if the installation position has been shifted.

Clean the surface of the sensor to prevent dirt from affecting sound wave emission.

By strictly controlling the installation distance, the measurement accuracy and stability of ultrasonic level gauges can be significantly improved, avoiding malfunctions caused by improper installation.

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LU-AAHE1A2ABMA6

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