The ultrasonic level gauge is a digital level gauge controlled by a microprocessor.
In the measurement, the ultrasonic pulse is emitted by the sensor (transducer), and the sound wave is reflected by the liquid surface and received by the same sensor or ultrasonic receiver, converted into an electrical signal by a piezoelectric crystal or magnetostrictive device, and transmitted and received by the sound wave The time between to calculate the distance from the sensor to the surface of the liquid being measured. Due to the non-contact measurement, the measured medium is almost unlimited, and it can be widely used for measuring the height of various liquids and solid materials.
The ultrasonic level gauge is composed of three parts: ultrasonic transducer, processing unit, and output unit.
2-wire system 4-20m/50Q load, 4-wire system 4-20m/10Q load
Optional 485, /232.
Standard 24VDC, 220VAC optional
Display instrument IP65
The working principle of the ultrasonic level meter is that the ultrasonic transducer (probe) sends out a high-frequency pulse sound wave when it encounters the surface of the measured level (material) and is reflected and folded back. The reflected echo is received by the transducer and converted into an electrical signal. The propagation time of the sound wave. It is proportional to the distance from the sound wave to the surface of the object. The relationship between the sound wave transmission distance S and the sound speed C and the sound transmission time T can be expressed by the formula: S=C×T/2.
Because the transmitted ultrasonic pulse has a certain width, the reflected wave and the transmitted wave in a small area close to the transducer overlap, which cannot be identified and the distance value cannot be measured. This area is called the measurement dead zone. The size of the blind zone is related to the model of the ultrasonic level meter.
The probe part emits ultrasonic waves, and then is reflected by the liquid surface, and the probe part receives it again. The distance from the probe to the liquid (object) surface is proportional to the elapsed time of the ultrasonic wave:
Distance [m] = time × speed of sound/2 [m]
The temperature compensation formula for the speed of sound: ambient sound speed = 331.5 + 0.6 × temperature.
Automatic power adjustment, gain control, temperature compensation.
Advanced detection technology and rich software functions adapt to various complex environments.
Using new waveform calculation technology to improve the measurement accuracy of the instrument.
It has the function of suppressing interference echo to ensure the authenticity of the measurement data.
Multiple output forms: programmable relay output, high-precision 4-20mA current output, Rs-485 digital communication output, split ultrasonic liquid level probe