The company is committed to the research of sonar technology theory, actively exploring and applying this technology to the field of industrial automation control. At present, the company has developed three products: two-wire external level gauge, four-wire external level gauge and external level switch, and their performance has reached the international leading level. Among them, the double-line external stick level gauge is the first in the world.
We take customer demand as the starting point, provide high-quality products and services as the carrier, aim at customer satisfaction, and create maximum value for customers. With the service concept of honesty, professionalism, high efficiency, people-oriented and independent innovation, we will strive to become an influential high-tech enterprise in the field of automation control in China.
External level gauge
Product overview:
The externally attached level gauge adopts the leading digital signal processing technology, which avoids the influence of container wall thickness and realizes the real non-contact measurement of liquid level height in the closed container outside the tank. Sonar sensor (probe) is installed just below the outer wall (bottom) of the measured container, which is convenient to install and realize online installation and debugging without affecting production. It can accurately measure the liquid level of all kinds of flammable, explosive, toxic and dangerous media, strong acid, strong alkali and all kinds of pure liquids in high temperature and high pressure closed containers.
Working principle:
The externally attached level gauge adopts sonar ranging principle, collects sonar signals through a special probe attached to the outside of the container wall, takes the special sonar wave processing technology as the core of the system, adopts advanced high-speed signal processing technology and uses the special algorithm of Shaanxi Acoustics Department to accurately calculate the liquid level in the container. The calculated liquid level value is displayed locally and the remote transmission signal is output. The instrument can output the measurement results to the control center through (4 ~ 20) Ma analog signals, Hart, RS-485, Ethernet and other interfaces, and can also be debugged online through Wi-Fi, Bluetooth, Hart, RS-485, infrared, Ethernet and other interfaces.
When measuring the liquid level, the probe sends out a sonar wave signal, and the echo signal is detected by the probe after being reflected by the liquid level. After the echo signal is processed by a proprietary algorithm, the time t is calculated, and the system calculates the liquid level height according to the formula.
Functional features:
First two-wire system
It broke through various technical difficulties and successfully developed a double-line external-attached level gauge. The invention realizes ultra-low power consumption signal processing, reaches the industrial field two-wire system standard, simplifies the field wiring requirements, saves a lot of cables and installation costs, and is more conducive to safety and explosion prevention.
The non-contact liquid level measurement is safe.
When measuring toxic, corrosive, pressurized, flammable, explosive, volatile and easy-to-leak liquid, the sonar sensor (probe) is externally arranged, without valves, connecting pipes and joints, without holes, and without touching the liquid and gas in the tank, which is very safe.
Easy to install, debug and maintain.
The tank body cannot be cleaned during installation, debugging and maintenance, which does not affect the production, and is especially suitable for occasions where it is not suitable to open the lid for debugging under dangerous conditions.
Automatic calibration and self-diagnosis function
The automatic calibration function of external level gauge overcomes the problem that the accuracy of traditional level gauge decreases after long-term use. Its working state and hardware diagnosis function increase the reliability and stability of the external level gauge.
Local display and remote transmission function
The external level gauge can not only conveniently display the field level value, but also transmit the level information to the control room through the signal line.
Application field:
The external level gauge is especially suitable for non-contact accurate measurement of various toxic substances, strong acids, strong bases and various liquids (liquid chlorine, liquid ammonia, vinyl chloride, liquefied petroleum gas, liquefied natural gas, propane, butane, ethylene, propylene, butadiene, acetone, gasoline, kerosene, diesel oil, hydrochloric acid, sulfuric acid, aqua regia, etc.). ) in an airtight container. Please refer to the table below for some measuring media. The instrument adopts explosion-proof design and can be used in occasions where explosion-proof is needed. Can be widely used in petroleum, mines, power plants, chemical plants, water plants, sewage treatment stations, agricultural water, environmental monitoring, food (brewing, beverages, additives, edible oil, dairy products), flood control, hydrological monitoring and many other industries. When there are bubbles in the measured liquid, there is an air layer in the middle of the tank wall, the viscosity of the liquid is too high, and the reaction will occur in the measured medium. The measurement accuracy of external liquid level gauge may decrease. Please consult our engineers for specific working conditions.