High precision ultrasonic level gauge

High precision ultrasonic level gaugeProduct Introduction

Ultrasonic level gauges can adopt two-wire, three wire, or four wire technology. The two-wire system is: power supply and signal output are shared; The three wire system is: the power supply circuit and the signal output circuit are independent. When using DC 24V power supply, a 3-core cable can be used, and the negative end of the power supply and the negative end of the signal output share the same core wire; The four wire system is: when using AC 220V power supply, or when using DC 24V power supply and requiring isolation between the power supply circuit and the signal output circuit, a 4-core cable should be used. DC or AC power supply, with 4-20mADC and high/low switch output.

Range: 0-50 meters, multiple forms to choose from, suitable for various corrosive and chemical applications, high precision, remote signal output, PLC system monitoring.

High precision ultrasonic level gaugeworking principle

Ultrasonic level gauge is a device that emits high-frequency pulse sound waves from an ultrasonic transducer (probe), which are reflected back on the surface of the measured material and converted into electrical signals by the transducer The propagation time of sound waves is directly proportional to the distance they travel to the surface of an object The relationship between sound wave transmission distance S, sound velocity C, and sound transmission time T can be expressed by the formula: S=C × T/2

Due to the certain width of the emitted ultrasonic pulses, the reflected waves in a small area close to the transducer overlap with the emitted waves, making it difficult to identify and measure their distance values. This area is called the measurement blind spot. The size of the blind spot is related to the model of the ultrasonic level gauge.

The probe emits ultrasonic waves, which are then reflected by the liquid surface and received by the probe. The distance between the probe and the liquid (object) surface is proportional to the time the ultrasonic waves have passed

Distance [m]=Time x Sound Speed/2 [m]

Temperature compensation formula for sound velocity: Environmental sound velocity=331.5+0.6 x temperature

site conditions

In any of the following situations, please note:

• Liquid/solid with foam

• There is strong voltage, strong current, and strong electromagnetic interference around, so try to avoid high voltage, high current, and strong electromagnetic interference as much as possible

• Strong winds and direct sunlight

• Strong vibration

The Shanghai Weier Tai ultrasonic level gauge is a digital level instrument controlled by a microprocessor. In measurement, pulsed ultrasonic waves are emitted by sensors (transducers), and the sound waves are reflected by the surface of the object and received by the same sensor, which converts them into electrical signals. And the distance between the sensor and the object being measured is calculated based on the time between the emission and reception of sound waves. Due to the use of non-contact measurement, the measured medium is almost unrestricted and can be widely used for measuring the height of various liquid and solid materials.

Product Features

Automatic power adjustment, gain control, temperature compensation.

*The detection technology and rich software functions adapt to various complex environments.

Adopting new waveform calculation technology to improve the measurement accuracy of the instrument.

The suppression function with interference echo ensures the authenticity of measurement data.

Multiple output forms: programmable relay output, high-precision 4-20mA current output, Rs-485 digital communication output, split ultrasonic liquid level probe

Hangzhou Aolituo Instrument Co., Ltd. specializes in the production of ultrasonic level gauges