Explosion-proof float level switch
Explosion-proof float level switch, also known as explosion-proof float level controller. This product is designed based on the principle of buoyancy and lever. When the liquid level in the container changes, the position of the float ball will change with the change of the liquid level. This displacement of the float ball will act on the micro-switch through the lever, and then the switch signal will be generated by the micro-switch.
Application scope and features:
Explosion-proof float level switch can be widely used in petroleum, chemical, electric power, metallurgy, food, pharmaceutical, paper and other industries. It can realize the brake alarm and control of the liquid level in various containers.
Glass plate level gauge
The glass plate level meter is designed based on the principle of communication device. The liquid path composed of the glass plate and the main body of the level meter is connected with the measured container through the nozzle flange or taper pipe thread to form a communication device. The liquid level observed through the glass plate is the same as the liquid level in the container.
The needle valve at both ends of the liquid level gauge not only plays the role of a stop valve, but the steel ball inside has the function of a check valve. When the liquid level gauge is accidentally damaged and leaked, the steel ball can automatically close the liquid channel under the action of medium pressure to prevent a large amount of liquid outflow and play a safety protection role. The liquid level meter can change the material of the parts or add some auxiliary parts to achieve anti-corrosion, heat preservation, anti-frost, lighting and other functions.
Application scope and features:
The glass plate level gauge has the advantages of simple structure, economical and practical, convenient installation, reliable operation and long service life.
As a basic liquid level indicator, this product is widely used in the simplest liquid level measurement occasions and the degree of automation is not very high in the level measurement and monitoring of large engineering projects.
Glass tube type level gauge
The liquid level meter is designed based on the principle of the communicator, which is a liquid path composed of glass tubes. The passage is connected with the measured container through the nozzle flange or taper pipe thread to form a communication device, and the liquid level observed through the glass tube is the same as the liquid level in the container, that is, the liquid level height.
Tubular level gauge is mainly composed of glass tube, protective sleeve, upper and lower valves and connecting flanges (or threads). The liquid level meter can achieve the function of anti-corrosion or heat preservation by changing the material of the part or adding some auxiliary parts.
Application scope and features:
Tubular level meter has excellent performance (such as high temperature, high pressure, etc.). In addition, it has the advantages of simple structure, economical and practical, convenient installation, reliable operation and long service life.
As a basic liquid level indicator, the liquid level gauge is widely used in the simplest liquid level measurement occasions and large-scale engineering projects with a low degree of automation.
Steel tape level gauge
The steel strip liquid level gauge is a traditional liquid level gauge. It is designed and manufactured by the principle of mechanical balance. It is composed of liquid level detection device, high precision displacement transmission system, constant force device, display device, transmitter device and other peripherals.
A float immersed in the liquid under test is subject to gravity W, buoyancy F, and a constant pulling force T generated by a constant force device, and when the vector sum of the three forces equals zero, the float is at a quasi-equilibrium rest. Buoyancy at mechanical equilibrium is quasi-constant (the volume V of the float immersed in the liquid is constant).
When the liquid level changes, the original mechanical equilibrium will reach a new equilibrium through the movement of the steel strip under the disturbance of the float by the buoyancy. The liquid level detection device (float) drives the steel belt to move according to the liquid level, and the displacement transmission system drives the transmission pin to rotate through the movement of the steel belt, and then acts on the counter to display the liquid level.
The transmitter converts this liquid level into a standard electrical signal and outputs it through the signal line. This electrical signal can drive other control devices.
Application scope and features:
The steel strip liquid level meter has the advantages of strong practicability, large measuring range, high precision, high performance and stability, long service life and easy maintenance. In addition, the large counter display makes the reading clear and accurate; Manual float lifting mechanism can check the working condition of the instrument at any time; Can be connected with a variety of transmitters to form a liquid level detection system.
Can be widely used in petroleum, chemical, electric power, metallurgy, environmental protection, food and other industrial departments and ancillary facilities of various transmitter connection, the liquid level changes in the container into analog signals, electrical pulse signals or switching signals remote transmission to the control room display or computer room for data display and processing.
Magnetic tilting column level gauge
The magnetic tilting column level meter is also called the magnetic tilting plate level meter, and its structure is mainly designed and produced based on the principle of buoyancy and magnetic force. The position of a float with a magnet (referred to as a magnetic float) in the measured medium is affected by buoyancy. The change of the liquid level leads to the change of the position of the magnetic float, and the magnetostatic coupling of the magnetic float and the magnetic turnover column (also known as the magnetic turnover plate) causes the magnetic turnover column to flip at a certain Angle (the surface of the magnetic turnover column is coated with different colors), which reflects the liquid level in the container.
The electronic module and transmitter module composed of sensors (magnetic reed switches) and precision electronic components can be converted to send output resistance signals, current values (4 ~ 20mA) signals, switching signals and other electrical signals. Thus to achieve the perfect combination of field observation and remote control.
Application scope and features:
It has the advantages of simple structure, easy use, stable performance, long service life, easy installation and maintenance.
The magnetic tilting column liquid level gauge can be applied to liquid level measurement and control in almost all kinds of industrial automation process control. It can be widely used in petroleum processing, food processing, chemical industry, water treatment, pharmaceutical, electric power, paper making, metallurgy, ships and boilers and other fields of liquid level measurement, control and monitoring.
Magnetic float level meter (Level switch)
The structure of maglev ball liquid level meter (level switch) is mainly designed and produced based on the principle of buoyancy and static magnetic field. The position of the float with a magnet (referred to as the float) in the measured medium is affected by the action of buoyancy: the change in the liquid level causes the change in the position of the magnetic float.
The magnet in the float and the sensor (magnetic reed switch) act to change the number of components (such as fixed resistance) of the circuit in series, and then change the electrical quantity of the instrument circuit system. That is, the change in the position of the magnetic float causes a change in the electrical quantity. The liquid level in the container is reflected by detecting the change of electrical quantity.
The liquid level meter can output the resistance value signal directly, and can also use the converter module to output the current value (4 ~ 20mA) signal; At the same time with other converters, output voltage signals or switching signals (can also be according to customer demand by the company to distribute). The remote transmission, analysis and control of electrical signals are realized.
Application scope and features:
Magnetic float level meter can be applied to almost all kinds of industrial automation process control level measurement and control, can be widely used in petroleum processing, food processing, chemical industry, water treatment, pharmaceutical, electric power, paper making, metallurgy, ships and boilers in the field of level measurement, control and monitoring.
Weight probe liquid level gauge
The heavy weight detection liquid level meter is designed and produced according to the principle of mechanical balance. When the steel strip is at rest in a certain position in the liquid, the gravity of the float, the wire rope (or the steel strip), the weight and the pointer, the buoyancy force of the steel strip and the friction force of the system are in equilibrium.
When the liquid level changes, the buoyancy F will change accordingly, and the original balance of the system will be disturbed and the dynamic balance will be reached again. The change of the liquid level causes the change of the float position, and the weight drives the pointer up and down. The change of the liquid level in the container can be clearly and intuitively displayed on the scale.
The top of the scale plate indicates the zero level of the liquid level, and the bottom end indicates the full scale of the liquid level. The pointer changes as the level changes, and then continuously indicates the level of the liquid level.
Application scope and features:
The weight detection liquid level meter has the advantages of reasonable structure design, excellent performance, reliable operation, long service life, easy installation and maintenance, and reasonable price. It can be widely used in chemical industry, electric power, water treatment and other fields of medium and large tanks of various liquids and high viscosity, corrosive liquid level continuous measurement under atmospheric pressure conditions.
Ultrasonic level meter
That is, through a device that can emit energy waves (generally pulse signals), the energy wave is reflected when it encounters an obstacle, and the reflected signal is received by a receiving device. The change of level is determined according to the time difference of measuring the energy wave movement process. The microwave signal is processed by an electronic device and finally converted into an electrical signal related to the level.
Once the probe transmits ultrasonic pulse signals to the surface of the measured medium, the ultrasonic wave is reflected after encountering the measured medium (obstacle) in the transmission process, and the reflected ultrasonic signal is detected by the electronic module and processed by special software. The time difference between transmitting ultrasonic wave and echo can be analyzed, and the distance of ultrasonic wave propagation can be accurately calculated by combining the propagation speed of ultrasonic wave. In turn, it can reflect the situation of the level.
Application scope and features:
It can be used to automatically compensate the interference of steam, dust and moisture. In addition to liquid/solid, it can also be used for uninterruptible material/level control, tanks, storage tanks, uninterruptible material/level measurement storage rooms, granaries, etc. It is widely used in petroleum, chemical industry, tap water, sewage treatment, water conservancy and hydrology, iron and steel, coal mine, electricity, transportation and food processing industries.
Intelligent radar level meter
Intelligent radar level meter is a kind of microwave level meter, which is an application of microwave (radar) positioning technology. It is transmitted through a device that can emit energy waves (generally pulse signals), the energy wave is reflected when it encounters an obstacle, and the reflected signal is received by a receiving device. The change of level is determined according to the time difference of measuring the energy wave movement process. The microwave signal is processed by an electronic device and finally converted into an electrical signal related to the level.
In microwave level measurement equipment, the energy wave used is usually a high-frequency electromagnetic wave with a frequency of 8.3GHz (mostly around 6GHz, but there are higher frequencies). The energy waves used by the device are pulsed energy waves. The maximum pulse energy of the general pulse energy wave is about 1mW (the average power is about 1μW), and it will not cause radiation damage to other equipment and personnel.
Scope of application:
The intelligent radar level level meter is used for non-contact continuous measurement of the level of liquids, slurries and particles. It is suitable for occasions where the temperature and pressure change greatly and there is inert gas or steam. It adopts the measurement method of microwave pulse (PTOF) and can work normally in the range of industrial frequency bands. Beam energy is low, can be installed in a variety of metal, non-metal containers or pipelines, no harm to the human body and the environment.
Features:
1, no blind area, high precision 2, two-wire technology, is the differential pressure instrument, magnetostriction, RF admittance, magnetic flap instrument excellent alternative products. 3, free from pressure changes, vacuum, temperature changes, inert gas, smoke, steam and other environmental impact 4, easy installation, strong and durable, maintenment-free 5, the output signal is 4mA ~ 20mA/HART protocol, simple calibration, easy to achieve on-site calibration operation through digital liquid crystal display, through the software to achieve simple configuration setting and programming 6, sensitive measurement, Refresh speed is fast. 7, suitable for high temperature conditions, up to 200℃ process temperature, when using high temperature extension antenna up to 350℃.
Capacitive level meter
The measuring principle of the capacitive level meter shows that the oscillation frequency of the oscillating circuit is related to the capacitance value, and the change of the level causes the change of the system capacitance, and then changes the oscillation frequency of the oscillating circuit. The oscillating circuit in the sensor can convert the capacitance change caused by the level change into the frequency change, and send it to the electronic module, and then convert it into the engineering quantity after calculation and analysis processing, so as to realize the continuous measurement of the level.
The instrument is made using advanced technology and production processes and consists of sensors, secondary instruments and other accessories. The sensor is placed on the top of the silo, the probe is inserted vertically into the silo, and the secondary instrument is placed in other suitable places. The sensor converts the change of level into the corresponding electrical pulse signal, which is transmitted to the secondary instrument to process and display the level height, and has high/low alarm and low alarm. 4 to 20mA. Transfer output for liquid/solid material crop height display, alarm, control and remote display or composition systems.
Application scope and features:
The liquid level gauge has the advantages of simple structure, convenient installation and reliable performance; At the same time, the electrode is made of stainless steel material, strong corrosion resistance, insulation and conductive materials can be used, and the maintenance amount is small.
The liquid level gauge can be widely used in petroleum, chemical, electric power, metallurgy, food, environmental protection and other industrial sectors to monitor the level of open or pressurized vessels. However, the liquid level meter is not suitable for occasions where the dielectric constant or material humidity changes too much and the solid medium where the material particles are greater than 15mm and cannot be in good contact with the electrode.
Magnetostrictive level meter
The working principle of magnetostrictive liquid level sensor: An initial pulse is generated by the electronic circuit in the electron bin. When the initial pulse is transmitted in the waveguide wire, a rotating magnetic field advancing along the direction of the waveguide wire is generated. When the magnetic field meets the permanent magnetic field in the magnetic ring or float, a magnetostrictive effect is generated, which causes the waveguide wire to twist. This twist is sensed by the pickup energy mechanism installed in the electronic bin and converted into the corresponding current pulse, and the time difference between the two pulses can be calculated through the electronic circuit, and the displacement and liquid level can be accurately measured.
Application scope and features:
The product has the advantages of high precision, good stability, high reliability, diverse output signals, long service life, safety and reliability.
Widely used in industrial process control, oil processing, pharmaceutical, food processing, water treatment, gas station underground inventory in the field of liquid level, temperature, density, interface and other physical parameters monitoring, alarm and control.