Equipped with HART ultrasonic level gauge

Equipped with HART ultrasonic level gaugeProduct Introduction

Ultrasonic level gaugeThe working principle of the transducer is that ultrasonic pulses are emitted by the transducer and reflected back from the surface of the measured medium. Some of the reflected echoes are received by the same transducer and converted into electrical signals. Ultrasonic pulses propagate at the speed of sound waves, and the time interval required from emission to reception of ultrasonic pulses is proportional to the distance from the transducer to the surface of the measured medium. The relationship between the distance value S and the speed of sound and transmission time T can be expressed by the formula: S=C × T/2

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

Equipped with HART 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

• Basic requirements

When the transducer emits ultrasonic pulses, there is a certain emission angle. There shall be no obstacles in the area radiated by the emitted microwave beam from the lower edge of the transducer to the surface of the measured medium. Therefore, during installation, it is advisable to avoid facilities inside the tank as much as possible, such as ladders, limit switches, heating equipment, brackets, etc. If necessary, 'false echo learning' must be performed. Additionally, it should be noted that the ultrasonic beam must not intersect with the feeding material flow. Attention should also be paid when installing instruments: the material level must not enter the measurement blind zone; the instrument must maintain a certain distance from the tank wall; The installation of the instrument should be as perpendicular as possible to the emission direction of the transducer and the surface of the measured medium. Instruments installed in explosion-proof areas must comply with the installation regulations of national explosion-proof hazardous areas. The casing of explosion-proof instruments is made of die cast aluminum. Explosion proof instruments can be installed in places with explosion-proof requirements, and the instruments must be grounded.

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