Explosion-proof float level switch
Explosion-proof float level switch, also known as explosion-proof float level controller. It is specially designed and manufactured for use in explosive atmospheres, this product is designed based on the principle of buoyancy and the principle of lever, when the liquid level in the container changes, the position of the float will change with the change of the liquid level, this displacement of the float will act on the micro switch through the lever, and then the switch signal will be generated by the micro switch.
Features and scope of application:
The explosion-proof float level gauge can realize the braking alarm and control of the liquid level in various containers, and is widely used in petroleum, chemical, electric power, metallurgy, food, pharmaceutical, paper and other industries.
Glass plate level gauge
The glass plate level gauge is designed based on the principle of the communicator, and the liquid path composed of the glass plate and the main body of the liquid level gauge is connected with the tested container through the pipe flange or cone pipe thread to form a communicator, and the liquid level observed through the glass plate is the same as the liquid level in the container, that is, the liquid level height.
The needle valve at both ends of the level gauge not only plays the role of a globe valve, but also has the function of a check valve, when the level gauge is accidentally damaged and leaked, the steel ball can automatically close the liquid channel under the action of medium pressure, preventing a large amount of liquid from flowing out and playing a role in safety protection. The level gauge can change the material of the parts or add some auxiliary parts to achieve the functions of anti-corrosion, heat preservation, anti-frost, lighting and so on.
Features and scope of application:
The glass plate level gauge has the advantages of simple structure, economy and practicality, easy installation, reliable work and long service life.
As a basic level indicator level gauge, this product is widely used in the simplest liquid level measurement occasions and in large-scale engineering projects with a low degree of automation.
Glass tubular level gauge
The level gauge is based on the principle of a feed-through, a liquid path consisting of a glass tube. The passage is connected with the tested container through the pipe flange or cone pipe thread to form a communicator, 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 level gauge can change the material of the parts or add some auxiliary parts to achieve the function of anti-corrosion or heat preservation.
Features and scope of application:
Tubular level gauges have excellent performance (such as high temperature resistance, high pressure, etc.). In addition, it has the advantages of simple structure, economic and practical, convenient installation, reliable work and long service life.
As a basic liquid level indicator level gauge, it is widely used in the simplest liquid level measurement occasions and large-scale engineering projects with a low degree of automation to measure and monitor the liquid level.
Steel belt level gauge
The steel belt level gauge is a traditional level gauge. It is designed and manufactured using the principle of mechanical equilibrium. It is composed of a liquid level detection device, a high-precision displacement transmission system, a constant force device, a display device, a transmitter device and other peripherals.
The float immersed in the liquid to be measured is subjected to the gravitational force W, the buoyancy force F and the constant tensile force T generated by the constant force device, and when the vector sum of the three forces is equal to zero, the float is in a quasi-equilibrium stationary state. The buoyancy force in 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 belt under the disturbance of the float by buoyancy. The liquid level detection device (float) drives the steel belt to move according to the liquid level, and the displacement transmission system instigates 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 level situation into a standard electrical signal and outputs it via a signal line. This electrical signal can drive other control devices.
Features and scope of application:
The steel belt level gauge has the advantages of strong practicability, large measurement range, high accuracy and stable performance, long service life, and easy maintenance. In addition, the large counter display makes the reading clear and accurate; Manual float lifting mechanism, which can check the working condition of the instrument at any time; It can be connected with a variety of transmitters to form a liquid level detection system.
It can be widely used in petroleum, chemical, electric power, metallurgy, environmental protection, food and other industrial sectors and ancillary facilities to connect various transmitters, convert the liquid level change in the container into analog signals, electrical pulse signals or switch signals and transmit them to the control room display or computer room for data display and processing.
Magnetic flip column level gauge
The magnetic flap level gauge is also known as the magnetic flap level gauge, 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 in liquid level leads to a change in the position of the magnetic float, and the hydrostatic coupling of the magnetic float and the magnetic flap column (also known as the magnetic flap) causes the magnetic flap column to flip at a certain angle (the surface of the magnetic flap column is coated with different colors), which in turn reflects the liquid level in the container.
With sensors (reed switches) and precision electronic components, electronic modules and transmitter modules can transmit output resistance value signals, current value (4-20mA) signals, switching signals and other electrical signals. So as to achieve the perfect combination of on-site observation and remote control.
Features and scope of application:
Simple structure, easy to use, stable performance, long service life, easy installation and maintenance and other advantages.
Magnetic flip column 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 liquid level measurement, control and monitoring in petroleum processing, food processing, chemical industry, water treatment, pharmaceutical, electric power, papermaking, metallurgy, ships and boilers.
Magnetic Float Level Gauge (Level Switch)
The structure of the magnetic float level gauge (liquid 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 buoyancy: a change in the liquid level leads to a change in the position of the magnetic float.
The magnets and sensors (reed switches) in the float act to change the number of components (such as fixed-value resistors) connected in series into the circuit, which in turn changes 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 change in the amount of electricity is detected to reflect the situation of the liquid level in the container.
The level gauge can directly output the resistance value signal, or it can be used with the transmitter module to output the current value (4-20mA) signal; At the same time, it can be used with other converters to output voltage signals or switching signals (converters can also be distributed by the company according to customer needs). In this way, the remote transmission, analysis and control of electrical signals can be realized.
Features and scope of application:
The magnetic float level gauge can be applied to the level measurement and control in almost all kinds of industrial automation process control, and can be widely used in the liquid level measurement, control and monitoring in the fields of petroleum processing, food processing, chemical industry, water treatment, pharmaceutical, electric power, papermaking, metallurgy, ships and boilers.
Hammer probe level gauge
The hammer level gauge is designed and produced according to the principle of mechanical equilibrium. When the steel belt is immersed in the liquid and stationary at a certain position, the gravity of the float, the wire rope (or steel belt), the weight and the pointer, the buoyancy of the liquid on the steel belt and the system friction are in a state of equilibrium.
When the liquid level changes, the buoyancy F will change accordingly, and the original equilibrium of the system will be disturbed and the dynamic equilibrium will be re-reached. The change of liquid level leads to the change of the position of the float, and the hammer drives the pointer to move up and down, and the liquid level change in the container can be clearly and intuitively displayed on the ruler.
The top end of the ruler plate indicates the zero position of the liquid level, and the bottom end indicates the full scale range of the liquid level. The pointer changes according to the level and continuously indicates the level of liquid.
Features and scope of application:
The hammer detection level gauge has the advantages of reasonable structural design, excellent performance, reliable work, long service life, easy installation and maintenance, and reasonable price. It can be widely used in the fields of chemical industry, electric power, water treatment and other fields of large and medium-sized storage tanks for continuous measurement of various liquids and high viscosity and corrosive liquid levels under normal pressure conditions.
Ultrasonic level sensor
It is to emit energy waves through a device that can transmit energy waves (generally pulse signals), and the energy waves are reflected when they encounter obstacles, and the reflected signals are received by a receiving device. The change in level is determined based on the time difference in the measurement of the movement of the energy wave. The microwave signal is processed by an electronic device and finally converted into a level-dependent electrical signal.
A probe emits an ultrasonic pulse signal to the surface of the measured medium, the ultrasonic wave is reflected after encountering the measured medium (obstacle) during the transmission process, the reflected ultrasonic signal is detected by the electronic module, processed by special software, and the time difference between the emitted ultrasonic wave and the echo is analyzed, combined with the propagation speed of the ultrasonic wave, the distance of ultrasonic propagation can be accurately calculated, and then the situation of the level can be reflected.
Features and scope of application:
It can be used to automatically compensate for the interference of steam, dust and moisture, and can be used for uninterrupted material/level control in addition to liquid/solid, tanks, storage tanks, uninterrupted material/liquid level measurement storage rooms, grain silos, etc. It is widely used in petroleum, chemical industry, tap water, sewage treatment, water conservancy and hydrology, iron and steel, coal mining, electric power, transportation and food processing industries.
Intelligent radar level gauge
Intelligent radar level meter is a kind of microwave level meter, which is an application of microwave (radar) positioning technology. It emits energy waves through a device that can emit energy waves (generally pulse signals), and the energy waves are reflected when they encounter obstacles, and the reflected signals are received by a receiving device. The change in level is determined based on the time difference in the measurement of the movement of the energy wave. The microwave signal is processed by an electronic device and finally converted into a level-dependent electrical signal.
In microwave level measurement devices, the energy waves used are usually high-frequency electromagnetic waves with a frequency of 8.3 GHz (mostly around 6 GHz, but higher frequencies are also available). The energy waves used by this device are pulsed energy waves. Generally, the maximum pulse energy of pulse energy waves 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 sensor is used for non-contact continuous measurement of the level of liquids, slurries and granular materials, and is suitable for occasions with large changes in temperature and pressure, and the presence of inert gases or vapors. It uses the microwave pulse (PTOF) measurement method and works well in the industrial frequency band. The beam energy is low, and it can be installed in various metal and non-metal containers or pipelines, and there is no harm to the human body and the environment.
Peculiarity:
1. No blind spots, high precision.
2. Two-wire technology, which is an excellent alternative to differential pressure instruments, magnetostrictive, radio frequency admittance, and magnetic flap instruments.
3. It is not affected by pressure changes, vacuum, temperature changes, inert gases, soot, steam and other environments.
4. Easy to install, firm and durable, maintenance-free.
5. The output signal is 4mA-20mA/HART protocol, which is simple to calibrate, easy to realize on-site calibration operation through digital liquid crystal display, and simple configuration setting and programming through software.
6. Sensitive measurement and fast refresh speed.
7. It is suitable for high temperature working conditions, up to 200°C process temperature, and up to 350°C when using high temperature extension antenna.
Capacitive level gauge
The measurement principle of capacitive level meter, the oscillation frequency of the oscillation 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 oscillation circuit. The oscillation circuit in the sensor converts the capacitance change caused by the level change into the frequency change, and sends it to the electronic module, which is converted into engineering quantity and displayed after calculation and analysis, so as to realize continuous measurement of the level.
The instrument is made using advanced technology and production processes, and it consists of sensors, secondary meters, and other accessories. The sensor is placed on the top of the silo, the probe extends vertically into the silo, and the secondary instrument is placed in other suitable places. The sensor converts the change of the level into the corresponding electrical pulse signal, which is transmitted to the secondary instrument to process and display the level height, and has a high/low limit alarm and ?4-20mA. Transmitter output, suitable for liquid/solid material crop level height display, alarm, control and remote transmission display or composition system.
Features and scope of application:
The level gauge has the advantages of simple structure, convenient installation and reliable performance; At the same time, the electrode is made of stainless steel, has strong corrosion resistance, and can be used as an insulating and conductive material, and the maintenance amount is small.
The level gauge can be widely used in petroleum, chemical, electric power, metallurgy, food, environmental protection and other industrial sectors to monitor the level in open or pressurized vessels. However, the level gauge is not suitable for occasions where the dielectric constant or material humidity changes too much and the solid medium where the material particles are larger than 15mm and cannot be in good contact with the electrode.
Magnetostrictive level gauge
The working principle of the magnetostrictive liquid level sensor: an initial pulse is generated by the electronic circuit in the electronic chamber, when the initial pulse is transmitted in the waveguide wire, a rotating magnetic field along the direction of the waveguide wire is generated simultaneously, when this magnetic field meets the permanent magnetic field in the magnetic ring or float, the magnetostrictive effect is generated, the waveguide wire is twisted, this twist is sensed by the energy pickup mechanism installed in the electronic chamber and converted into the corresponding current pulse, and the time difference between the two pulses is calculated by the electronic circuit. The measured displacement and liquid level can be accurately measured.
Features and scope of application:
The product has the advantages of high precision, good stability, high reliability, diverse output signals, long service life, safety and reliability.
It is widely used in the monitoring, alarm and control of physical parameters such as liquid level, temperature, density, interface and other fields in industrial process control, petroleum processing, pharmaceutical, food processing, water treatment, gas station underground inventory and other fields.
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