Four-wire ultrasonic level gauge

The ultrasonic level gauge is a digital level instrument controlled by a microprocessor. 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. So what is a four-wire ultrasonic level gauge? Before answering what is a four-wire ultrasonic level gauge, let us first understand the two-wire, three-wire or four-wire technology of the ultrasonic level gauge. Ultrasonic level gauges can adopt two-wire, three-wire or four-wire technology. 　　 two-wire ultrasonic level gauge: power supply and signal output are shared; 　　 three-wire ultrasonic level gauge: power supply circuit and signal output circuit are independent, when DC For 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; 　　 four-wire ultrasonic level gauge: when using AC 220v power supply, or when using DC 24v power supply, When the power supply circuit and the signal output circuit are required to be completely isolated, a 4-core cable should be used. DC or AC power supply, with 4~20mADC, high and low switch output.　　 Four-wire ultrasonic level gauge is composed of three parts: ultrasonic transducer, processing unit, and output unit. In the measurement, the ultrasonic pulse is emitted by the sensor (transducer), and the sound wave is reflected by the liquid surface and then 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. So what should you pay attention to when using the four-wire ultrasonic level gauge on site? 　　 In any of the following situations, pay attention: 　　·Foamy liquid/solid·There are strong voltages, currents, and strong electromagnetic interference around, try to avoid high Voltage, high current and strong electromagnetic interference, strong wind and direct sunlight, strong vibration, four-wire ultrasonic level meter is a digital level meter controlled by a microprocessor. In the measurement, the pulsed ultrasonic wave is emitted by the sensor (transducer), and the sound wave is reflected by the surface of the object and then received by the same sensor and converted into an electrical signal. The distance between the sensor and the object to be measured is calculated from the time between the emission and reception of the sound wave. Due to the non-contact measurement, the measured medium is almost unlimited, and it can be widely used for height measurement of various liquid and solid materials.　　 After talking about the on-site use, let’s talk about the on-site installation of the four-wire ultrasonic level gauge. 　　 The blind spot of the ultrasonic level gauge must be considered when installing the ultrasonic level meter. When the liquid level enters the blind zone, the ultrasonic transmitter cannot measure the liquid level. Therefore, when determining the range of the ultrasonic level gauge, a margin of 50 cm must be left. When installing, the transmitter probe must be higher than the highest liquid level. It's about 50 cm. Only in this way can the accurate monitoring of the liquid level be ensured and the safety of the ultrasonic liquid level gauge can be ensured.　　In actual use, because of ill-considered installation, the level gauge was submerged by water, causing the level gauge to be completely damaged. Low price, small size and light weight. It can be used for non-contact level measurement of liquid and bulk solids in food, chemical, semiconductor and other industries. It can be used for remote level monitoring and pump control. Note when installing machinery: the installation should be vertical When measuring the surface of the object, avoid using it to measure foamy objects, and avoid installing it where the distance from the surface of the measuring object is less than the blind zone distance (blind zone: each product will have a standard, which is known with the product), and the beam should be considered to avoid blocking substances When encountering the irrigation mouth and the container wall, when detecting large solid objects, the probe position should be adjusted to reduce the measurement error. Due to its unique function and strong applicability, the four-wire ultrasonic level gauge is more suitable for water and sewage treatment, such as: Pump houses, collection wells, biochemical reaction tanks, sedimentation tanks, etc., are also common in power, mine mortar pools, coal slurry pools, water treatment and other occasions.　　Kaidi is a professional manufacturer of four-wire ultrasonic level gauges. Its products are sold at home and abroad. It has set up more than 20 offices across the country, which can provide customers with door-to-door guidance services, which is your good choice.
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