Shanghai Yichuan Ultrasonic Liquid Level Gauge

Shanghai Yichuan Ultrasonic Liquid Level Gauge

Two wire, three wire, or four wire technology can be used, with the two wire system being: shared power supply and signal output; 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.

Shanghai Yichuan Ultrasonic Liquid Level Gauge

The working principle is that high-frequency pulse sound waves emitted by an ultrasonic transducer (probe) are reflected back on the surface of the measured object (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

Product Features

Automatic power adjustment, gain control, temperature compensation.

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