ultrasonic flow transmitter working principle| LPG flow meter for tank filling

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1. Ultrasonic level gauge

Ultrasonic level gauge? Ultrasonic level gauge is a digital level instrument controlled by a microprocessor. In measurement, ultrasonic pulses are emitted by sensors (transducers), and the sound waves are reflected by the liquid surface and received by the same sensor. They are converted into electrical signals by piezoelectric crystals, and the distance from the sensor to the measured liquid surface is calculated based on the time between the emission and reception of the 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. The ultrasonic level gauge consists of three parts: ultrasonic transducer (probe), driving circuit (module), and electronic LCD display module. [1] Chinese name Ultrasonic level transmitter Foreign name Ultrasonic level transmitter Range 0-60m Output signal 4-20mA, RS485

5, RS232 Power supply voltage DC24V/AC220V Fast navigation Site conditions Product characteristics Fault problems Product introduction Ultrasonic level transmitter is a monitoring instrument for measuring the number of groups, liquid height, tank height, and material position. The instrument itself 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 po

ultrasonic flow transmitter working principle

wer supply and requiring complete 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: 0-60 meters, multiple forms to choose from, suitable for various corrosive and chemical applications, high precision, remote signal output, PLC system monitoring. The working principle of ultrasonic level transmitter is that high-frequency pulse sound waves emitted by an ultrasonic transducer (probe) meet the surface of the measured object (material) and are reflected back. The reflected echoes are received 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 the sound wave transmission distance S, sound speed 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 pulse, the reflected wave and the transmitted wave overlap in a small area close to the transducer, 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 reflected when they encounter a medium with a large density difference from air. The reflected waves are then received by the probe, and the distance from the probe to the liquid (object) surface is proportional to the time the ultrasonic waves pass through: distance [m]=time x sound speed/2 [m]. The temperature compensation formula for sound speed is: ambient sound speed=331.5+0.6 x temperature

ultrasonic flow transmitter working principle

1. Ultrasonic level gauge

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