Ultrasonic Level Gauge Selection and Installation Guide

How to choose an ultrasonic level gauge? What should be paid attention to in the selection of ultrasonic level gauges? Basic knowledge of ultrasonic level gauge selection 1. Measured medium: medium physical properties: liquid; object; dust; whether it is regular; whether anti-corrosion is required; Volatile to the probe, it will affect the sound speed of the ultrasonic wave, resulting in errors. Whether there is fog: the treatment method, the anti-corrosion type can be selected. 2. Measured medium container: liquid level change range; the highest liquid level and zero position, that is, the corresponding 4-20MA, where the height of the tank itself can be set at will; the diameter and the distance from the installation position of the meter to the tank wall; this There is a beam angle problem, generally 8-10 degrees is closed; with or without pressure; can withstand 0. 3MPA (to be customized) temperature: it depends on the temperature that actually affects the watch, -25-60 degrees in the container Whether there is a stirrer, and if there is a stirrer at a low liquid level, will the agitator be exposed. 3. Site installation requirements: Blind zone: 20-100CM depends on the range, and a blind zone needs to be reserved for installation. Several-wire system (2-wire or 4-wire)/cable length/installation method, flange specification, etc./power supply voltage selection (220VAC, 24VDC) Precautions for installation of ultrasonic level gauge When installing the ultrasonic level gauge, pay attention to the following points Points: 1. The distance between the sensor and the highest liquid (object) level should be greater than the blind area (empty distance is equal to the highest material level + blind area), and the axis of the sensor should be perpendicular to the liquid (object) surface to be measured. 2. The minimum distance between the blind area and the sensor to the measuring liquid (object), the instrument cannot work normally in this interval, a normal value (range < 20m) is set between 30cm ~ 60cm, (range > 20m) between 60 ~ 100cm . 3. When necessary, rubber gaskets can be added during the fixation, and at the same time, keep away from noise sources as much as possible. 4. Due to the existence of the emission angle of the sensor, a certain distance should be maintained between the sensor and the wall during installation. When measuring the solid material level, the sensor should avoid the discharge port. 5. There should be no obstacles that may easily interfere with the signal, such as ladders, beams, maintenance channels, etc., within the measurement range. When measuring solid materials, a universal conversion connector can be used if necessary, through which the measurement angle of the sensor can be adjusted, so that the sensor can receive the echo signal to the greatest extent, and find the best point to achieve accurate measurement of the material level.
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