Extended Diaphragm Seal DP Transmitter is a level transmitter direct mounted on pipe or tank. The isolation diaphragm is in direct contact with the liquid medium.
Extended Diaphragm Seal DP Level Transmitter is a field level transmitter that is directly mounted on a pipe or container. The isolation diaphragm is in direct contact with the liquid medium. There is no need to lead out the positive pressure side with a pressure pipe. Therefore, it can measure the liquid level, pressure and density of high temperature, high viscosity, easy crystallization, easy precipitation and strong corrosion. Convert to 4 ～ 20mA. DC signal output.
The flanges are made of high-quality stainless steel materials such as 304 and 316. Wetted diaphragms are made of imported high-quality anti-corrosive materials such as 316L, Hastelloy C-276, Monel, and tantalum.
Sino-Inst offers a variety of DP pressure transmitters for industrial pressure measurement. Connection with diaphragm seals. If you have any questions, please contact our sales engineers.
Features of Extended Diaphragm Seal Differential Pressure Transmitter
Simple structure: There are no movable or elastic elements. Therefore, the reliability is extremely high. The amount of maintenance is very small.
Easy installation: The built-in structure especially shows this feature. No special tools are required.
Convenient adjustment: The two potentiometers of zero position and range can carry out zero point migration or range change at will within the effective range of liquid level detection. The two adjustments do not affect each other.
Widely used: Suitable for liquid level measurement of high temperature and high pressure, strong corrosion and other media.
Specifications of Extended Diaphragm Seal Level Transmitter
Measuring range:
can be customized within the range of -4-4MPa (-10-10KPa, 0-50KPa, etc.)
Output signal:
4 ～ 20MA.DC two-wire system (analog). Two-wire system 4 ～ 20mA DC signal is superimposed with digital signal. Linear or square root output is selected by the user. (Smart)
Power supply:
12 ～ 45V.DC
Range ratio:
10: 1 or 100 to 1
Power supply impact:
<0.005% output range / V
Load effect:
When the power supply is stable, there is no load effect.
Measurement accuracy:
0.1% of the calibration range. Standard accuracy is 0.2%. If other accuracy is selected, please indicate when ordering and selecting.
Resistance:
usually adjustable between 0.1 to 16 seconds. When filling with inert liquid or with a remote transmission device, the time constant will increase.
Applications of Extended Diaphragm Seal DP Level Transmitter
Extended Diaphragm Seal DP Transmitter can measure the liquid level, pressure and density of high temperature, high viscosity, easy crystallization, easy precipitation and strong corrosion and other media. Then convert it to 4-20mA. DC signal output
Mainly used for measurement in the following occasions:
Viscous medium at high temperature.
Easily crystallized medium.
Precipitated media with solid particles or suspended matter.
Strongly corrosive or highly toxic media.
It can eliminate the leakage of the pressure guiding pipe and pollute the surrounding environment. When the isolation liquid is used, the tedious work of frequently replenishing the isolation liquid due to the unstable measurement signal can be avoided.
Continuously and accurately measure the interface and density.
The remote transmission device can avoid the mixing of different instantaneous media, so that the measurement results truly reflect the actual situation of process changes.
Hygiene and cleaning requirements are high.
For example, in the production of food, beverage and pharmaceutical industries, not only the location of the transmitter in contact with the media must meet hygienic standards, but it should be easy to rinse.
Diaphragm seals are used for the protection of pressure measuring instruments in applications with difficult media. In diaphragm seal systems, the diaphragm of the diaphragm seal affects the separation of the instrument and the medium.
The pressure is transmitted to the measuring instrument via the system fill fluid which is inside the diaphragm seal system.
For the implementation of demanding customer applications, there are a wide variety of designs, materials and system fill fluids available.
Applications
Aggressive, highly viscous, crystallising or hot media
The differential pressure type liquid level gauge uses the principle that when the liquid level in the container changes, the static pressure generated by the liquid column also changes accordingly, as shown in the figure.
For closed tanks. Set the bottom pressure to P. If the pressure on the liquid surface is P3 and the liquid level height is H, then:
P = P3 + Hpg (3-11)
In the formula: p is the medium density; g is the acceleration of gravity. From the formula ((3-1 “available: △ P = P-P3 = Hpg (3-12)
Usually the density of the measured medium is known, the pressure difference △ P is proportional to the liquid level height H. The pressure difference on the side will know the measured liquid level height.
When the container under test is open, the gas pressure is atmospheric pressure. The negative pressure chamber of the differential pressure gauge can be vented to the atmosphere. It is known that the pressure gauge can also be used to measure the liquid level at this time. If the container is closed, you need to connect the negative pressure chamber of the differential pressure gauge to the gas phase of the container.
Pressure level transmitter is good for level measurement. Most of the time, we use submersible hydrostatic level sensor for the level measurement. When you can not use the probe of hydrostatic level sensor, you can try with this pressure level transmitter. Pressure level transmitter, is one type of DP level measure instrument, with the diaphragm.
SMT3151LT Differential pressure (DP) level transmitter a new type of differential pressure (DP) transmitter produced by advanced technology and equipment. Continuous level, flow and differential pressure measurement. Liquid level measurement, is the most common measurement process in continuous production processes, such as: petroleum and chemical industry. The liquid level measuring instrument currently widely used, is the differential pressure level transmitter.
SMT3151DP intelligent differential pressure transmitter uses advanced microprocessor technology and digital communication technology. The basic principle of differential pressure transmitter is: divide a space with sensitive elements (multi-purpose capsule) into two chambers. Introduce pressure into the two chambers separately. The sensor produces displacement (or displacement trend) under the combined action of the two pressures. This displacement is proportional to the pressure difference (differential pressure) between the two chambers. Convert this displacement into a standard signal output that can reflect the magnitude of the differential pressure.
Comparative analysis – 7 Tank Level Measurement Sensors
Wu Peng, born in 1980, is a highly respected and accomplished male engineer with extensive experience in the field of automation. With over 20 years of industry experience, Wu has made significant contributions to both academia and engineering projects.
Throughout his career, Wu Peng has participated in numerous national and international engineering projects. Some of his most notable projects include the development of an intelligent control system for oil refineries, the design of a cutting-edge distributed control system for petrochemical plants, and the optimization of control algorithms for natural gas pipelines.
Piezoresistive Differential Pressure Transmitter utilizes the piezoresistive effect of semiconductor silicon materials. Realize accurate measurement of differential pressure.
Piezoresistive Differential Pressure Transmitter uses integrated all-welded differential pressure measuring elements. Silicone oil is filled between the chip and the two corrugated diaphragms. This product utilizes the piezoresistive effect of semiconductor silicon materials. To achieve the conversion of differential pressure and electrical signals. The signal output from the Wheatstone bridge on the sensitive chip has a good linear relationship with the differential pressure. Therefore, accurate measurement of the measured differential pressure can be achieved. It is suitable for differential pressure measurement of various gases and liquids in petroleum, chemical.
Current output type: maximum 800Ω; voltage output type: greater than 50KΩ
Insulation resistance:
Greater than 2000MΩ (100VDC)
Sealing grade:
IP65
Long-term stability:
0.1% FS / year
Vibration effect:
Within the mechanical vibration frequency 20Hz ～ 1000Hz, the output change is less than 0.1% FS
Electrical interface:
Hessman connector ( Support customization）
Mechanical connection (thread interface):
M20 × 1.5, G1 / 2
Dimensions
Applications
Flow measurement
Wastewater treatment
Wind Diff Pressure undermine
Water Diff Pressure at hydropower station
urban flood control and waterlogging prevention
Underwater engineering
Groundwater monitoring
Central air-conditioning terminal control
Watersaving Irrigation
Working Principle of Piezoresistive Differential Pressure Transmitter
The sensitive element of the piezoresistive differential pressure transmitter is a solid piezoresistive sensitive chip. Silicone oil is filled between the chip and the two corrugated diaphragms.
The measured differential pressure acts on the corrugated diaphragms at both ends. The differential pressure is transmitted to the sensitive chip through silicone oil. The sensitive chip is connected to the special amplifier circuit through the wire. It utilizes the piezoresistive effect of semiconductor silicon materials.
To achieve the conversion of differential pressure and electrical signals. The signal output from the Wheatstone bridge on the sensitive chip has a good linear relationship with the differential pressure.
Therefore, accurate measurement of the measured differential pressure can be achieved. It is used to measure the pressure difference of various gases and liquids. It is suitable for the measurement of differential pressure and water level difference of pipelines in petroleum and chemical industries.
The so-called piezoresistive effect refers to the phenomenon that when the semiconductor is subjected to stress, the energy band changes due to the stress, the energy of the energy valley moves, and its resistivity changes.
It was discovered by C.S Smith in the 1954 test of the resistivity and stress change characteristics of silicon and germanium. Semiconductor piezoresistive sensors have been widely used in aviation, chemical, marine, power and medical sectors.
Strain pressure sensor VS piezoresistive pressure sensor
In principle, strain-type pressure sensors are caused by changes in the geometry (length or width) of the strained material caused by external pressure (or tension). This in turn causes the resistance of the material to change. The magnitude of the external force can be measured by detecting this resistance change.
Piezoresistive pressure sensors are usually semiconductor pressure sensitive materials. After the semiconductor piezoresistive sensor is subjected to external forces, its own geometry hardly changes. Instead, its lattice parameters change, affecting the width of the forbidden band. Even a very small change in the width of the forbidden band will cause a large change in carrier density. This eventually causes the resistivity of the material to change.
It can be seen that although both materials exhibit changes in resistance to changes in external force, the principles are different. In addition, the sensitivity of strain-type materials to external forces is much lower than that of semiconductor piezoresistive materials.
The sensitivity of the latter is about 100 times that of the former. The characteristics of strained materials are less affected by temperature. Semiconductor piezoresistive materials are sensitive to temperature.
Piezoresistive pressure sensor advantages and disadvantages
Advantages of piezoresistive pressure sensor:
High frequency response, f0 can reach 1.5M;
Small size and low power consumption;
High sensitivity, good accuracy, can measure to 0.1% accuracy;
No moving parts (the sensitive element is integrated with the conversion element).
Disadvantages of piezoresistive pressure sensor:
Poor temperature characteristics;
The process is complicated.
Techincal Support
Capacitive mems pressure sensor
A MEMS pressure sensor is a thin-film element. It deforms when subjected to pressure, and it can be measured using a strain gauge (piezoresistive sensing). It can also be measured by capacitively sensing the change in the distance between the two surfaces.
Capacitive pressure sensor is a pressure sensor that uses a capacitive sensing element to convert the measured pressure into an electrical output with a certain relationship. The characteristics are: low input energy, high dynamic response, small natural effect, good environmental adaptability.
Capacitive differential pressure sensor
Capacitive differential pressure sensor is filled with silicone oil in the left and right chambers of the measuring diaphragm. When the left and right isolation diaphragms are subjected to high pressure pH and low pressure pL respectively, the incompressibility and fluidity of the silicone oil can transmit the differential pressure Δp = pH-pL Measure the left and right sides of the diaphragm.
Because the measuring diaphragm is pre-tensioned before welding, it is very flat when the differential pressure Δp = 0. It makes the capacitances of the two capacitors on the left and right sides of the fixed plate are completely equal. That is, CH = CL. When there is a differential pressure effect, the measuring diaphragm deforms. That is, the moving electrode plate approaches the low voltage electrode plate. At the same time, it moves away from the high voltage measuring electrode plate. This makes the capacitance CH = CL.
Piezoresistance pressure sensor (piezoresistance type transducer) is a kind of pressure sensor. Piezoresistive pressure sensors, also known as diffused silicon pressure sensors, refer to sensors made using the piezoresistive effect of single crystal silicon materials and integrated circuit technology. The single crystal silicon material is subjected to force. The resistivity changes. The electrical signal output proportional to the force change can be obtained through the measuring circuit. Piezoresistive sensors are used for the measurement and control of pressure, tension, pressure difference, and other physical quantities that can be transformed into changes in force. Such as liquid level, acceleration, weight, strain, flow rate, vacuum degree.
How does a piezoresistive pressure sensor work?
Working principle of piezoresistive pressure sensor: It is the resistance change when the varistor is pressed. It is amplified by the amplifier and calibrated with standard pressure. The pressure can be detected. The performance of the piezoresistive pressure sensor mainly depends on the varistor (ie varistor), the amplifier circuit, and the calibration and aging process in production.
What do piezoresistive sensors measure?
Using the semiconductor piezoresistive effect, various types of piezoresistive sensors can be designed. The piezoresistive sensor has a small volume, a relatively simple structure, and high sensitivity. It can measure micro-pressures of more than ten micropascals, with good dynamic response. Good long-term stability, low hysteresis and creep. High frequency response, easy production, and low cost. Therefore, piezoresistive sensors have been widely used in measuring pressure, differential pressure, liquid level, acceleration and flow.
How do you test a pressure sensor?
There are 3 commonly used detection methods for pressure sensors. Hope it can help you. 1. Pressure test. The method of detection is to power the sensor. Use your mouth to blow the air hole of the pressure sensor. Use the voltage file of a multimeter to detect the voltage change at the output of the sensor. If the relative sensitivity of the pressure sensor is large, this amount of change will be significant. If there is no change at all, you need to use a pneumatic source to apply pressure. Through the above method, you can basically detect the condition of a sensor. If accurate testing is required, a standard pressure source is required. Give pressure to the sensor, and calibrate the sensor according to the pressure and the change of the output signal. And when conditions permit, the temperature detection of relevant parameters. 2. Zero point detection. Use the voltage range of the multimeter to detect the zero output of the sensor under no pressure. This output is generally a voltage of mV level. If it exceeds the technical specifications of the sensor, it means that the zero deviation of the sensor is out of range. 3. Detection of bridges. It mainly detects whether the circuit of the sensor is correct. It is generally a Wheatstone full-bridge circuit. Use the ohm file of the multimeter. Measure the impedance between the input terminals and the impedance between the output terminals. These two impedances are the input and output impedances of the pressure sensor. If the impedance is infinite, the bridge is disconnected. It means there is a problem with the sensor or the definition of the pin is not correct.
Sino-Instrument offers over 10 Piezoresistive Differential Pressure Transmitters. A wide variety of Piezoresistive Differential Pressure Transmitter options are available to you. Such as free samples, paid samples. Sino-Instrument is a globally recognized manufacturer of Pressure sensors, located in China. Sino-Instrument sells through a mature distribution network that reaches all 30 countries worldwide. Piezoresistive Differential Pressure Transmitter products are most popular in Europe, Southeast Asia, and Mid East. You can ensure product safety by selecting from certified suppliers. With ISO9001, ISO14001 certification.
Wu Peng, born in 1980, is a highly respected and accomplished male engineer with extensive experience in the field of automation. With over 20 years of industry experience, Wu has made significant contributions to both academia and engineering projects.
Throughout his career, Wu Peng has participated in numerous national and international engineering projects. Some of his most notable projects include the development of an intelligent control system for oil refineries, the design of a cutting-edge distributed control system for petrochemical plants, and the optimization of control algorithms for natural gas pipelines.
Ceramic pressure sensor is a pressure sensor refined from a thick ceramic base using a refined ceramic base.
SI-338 Ceramic pressure sensor uses ceramic or diffused silicon core. All stainless steel package, small and beautiful appearance. Suitable for occasions with limited installation space. Wide range temperature compensation, high accuracy, small size, no adjustment, wide range coverage. Support OEM processing. Ceramic pressure transmitter is used in compressor, air conditioning and other pressure measurement.
Sino-Inst is a manufacturer of Ceramic Pressure Sensor in China. Committed to the manufacture, sales and engineering support of Ceramic Pressure Sensos.
The corrosion-resistant ceramic pressure transmitter has no liquid transfer. Pressure acts directly on the front surface of the ceramic diaphragm. Make the membrane slightly deformed. Thick film resistors are printed on the back of the ceramic diaphragm and connected to form a closed Wheatstone bridge.
Due to the piezoresistive effect of the varistor, the bridge generates a voltage signal that is highly linear and proportional to the pressure and proportional to the excitation voltage. The standard signal is calibrated to 2.0 / 3.0 / 3.3 mV / V according to the different pressure ranges, which is compatible with strain gauge transmitters.
Through laser calibration, the transmitter has high temperature stability and time stability. The transmitter comes with temperature compensation of 0 ～ 70 ℃, and can directly contact most media.
Ceramic is a recognized material with high elasticity, corrosion resistance, wear resistance, shock resistance and vibration. The thermal stability of ceramics and its thick film resistance can make its operating temperature range as high as -40 to 135 ° C, and it has high accuracy and stability for measurement. The degree of electrical insulation is> 2kV, the output signal is strong, and the long-term stability is good.
The ceramic Diaphragm pressure sensor is a ceramic piezoresistive pressure sensor refined by a thick ceramic process using a refined ceramic base. Overall dimension Φ18mm * 6.35mm. Ceramic is a recognized material with high elasticity, corrosion resistance, wear resistance, impact resistance and vibration.
The good thermal stability of the ceramic and the high-temperature sintering process of the thick film make the working temperature range of the ceramic pressure sensor up to -40 ~ 125 ℃. The ceramic’s high elasticity and creep resistance make the ceramic pressure sensor have good long-term stability. In addition, the corrosion resistance of ceramics makes it uniquely advantageous in the fields of refrigeration, chemicals and environmental protection.
Sensor characteristics
● Ceramic overload sensitive diaphragm ● Zero point, full range laser calibration ● Excellent anti-corrosion and anti-wear performance ● Anti-shock and anti-vibration ● High precision and high stability ● Wide operating temperature range ● Small size and easy packaging ● Environmental protection
Ceramic Capacitive Pressure Sensor
Ceramic capacitive sensors use the most advanced ceramic technology, thick film electronic technology, and SMT technology.
Compared with other current capacitive sensors, the ceramic capacitive sensor uses a dry ceramic capacitive sensor without intermediary liquid, thus obtaining superior technical performance.
High stability, better than 0.10oF “S. every year
The temperature drift is small, ± 0.150o / lOK.
It has strong anti-overload and impact capability, and the overload can reach several times to one hundred times of the measuring range. Even if the measuring element is directly hit with a hard object, it will not be damaged.
It can be applied to medium measurement in various occasions in many industries.
Piezoresistive Pressure Sensor
The piezoresistive pressure sensor is constructed using the piezoresistive effect of single crystal silicon. A single crystal silicon wafer is used as an elastic element, and an integrated circuit process is used on the single crystal silicon membrane. A group of equivalent resistors are diffused in a specific direction of the single crystal silicon, and the resistors are connected into a bridge circuit. The single crystal silicon wafer is placed on Sensor cavity. When the pressure changes, the single crystal silicon produces strain, so that the strain resistance directly diffused thereon changes proportional to the measured pressure. Then the bridge circuit obtains the corresponding voltage output signal.
Low-Pressure Transducer
Combined Pressure and Temperature Sensor-Dual function
The ceramic pressure sensor is mainly composed of three parts: ceramic ring, ceramic diaphragm and ceramic cover.
The ceramic diaphragm is used as a sensitive elastomer. It is made of 95% AL2O3 porcelain. It is required to be flat, uniform and dense, and its thickness and effective radius depend on the design range.
The ceramic ring is formed by hot die casting process at high temperature.
High temperature glass paste is used between the ceramic diaphragm and the ceramic ring. They are fired together by thick film printing and thermal firing techniques to create a force-sensitive cup-shaped elastomer with a perimeter support. That is, a rigid structure without creep should be produced in the peripheral fixed part of the ceramic.
On the upper surface of the ceramic diaphragm, that is, the bottom of the porcelain cup and tea set, the circuit of the sensor is made by thick film technology.
The circular groove in the lower part of the ceramic cover creates a corresponding gap between the cover and the diaphragm. Limits prevent rupture of the diaphragm due to excessive bending when overloaded, resulting in overload protection of the sensor.
There are many types of pressure sensors. Such as resistance strain gauge pressure sensor, semiconductor strain gauge pressure sensor, piezoresistive pressure sensor, inductive pressure sensor, capacitive pressure sensor, resonant pressure sensor, etc.
The most widely used pressure sensors are: Diffused silicon piezoresistive pressure sensor, Ceramic Piezoresistive Pressure Sensors, sputtered thin film pressure sensor, capacitive pressure sensor, High temperature sapphire pressure sensor. But the most widely used is the piezoresistive pressure sensor. It has a very low price and high accuracy and better linearity characteristics.
A pressure sensor works by converting pressure into an analogue electrical signal.
The demand for pressure measuring instruments increased during the steam age. When pressure sensing technologies were first manufactured they were mechanical and used Bourdon tube gauges to move a needle and give a visual indication of pressure. Nowadays we measure pressure electronically using pressure transducers and pressure switches.
The Hydrostatic Pressure Transmitter measures the hydrostatic pressure exerted by a hydrostatic head. Use these hydrostatic pressure transmitters to measure…
An Air pressure transducer is a sensor that converts the mechanical signal of air pressure into a current signal. Pressure…
Sino-Inst offers Ceramic Pressure Sensors. A wide variety of Ceramic Pressure Sensors options are available to you. Such as free samples, paid samples. Sino-Inst is a globally recognized manufacturer of Ceramic Pressure Sensors, located in China. Sino-Inst sells through a mature distribution network that reaches all 30 countries worldwide. Pressure sensors products are most popular in Europe, Southeast Asia, and Mid East. You can ensure product safety by selecting from certified suppliers. With ISO9001, ISO14001 certification.
Wu Peng, born in 1980, is a highly respected and accomplished male engineer with extensive experience in the field of automation. With over 20 years of industry experience, Wu has made significant contributions to both academia and engineering projects.
Throughout his career, Wu Peng has participated in numerous national and international engineering projects. Some of his most notable projects include the development of an intelligent control system for oil refineries, the design of a cutting-edge distributed control system for petrochemical plants, and the optimization of control algorithms for natural gas pipelines.
Combined pressure and temperature sensor for Simultaneous measurement of pressure and temperature.
The Combined pressure-temperature sensor uses a special core. Thermocouple types are: J, K, E type or PT100 platinum resistance. Integrated structure of temperature and pressure. Measure the medium pressure and temperature at the same point at the same time. The combined pressure and temperature sensor has a built-in temperature / pressure sensor. The two outputs do not affect each other. Consuming the power of one sensor can complete the pressure and temperature measurement. Widely used in scientific research, military industry, petrochemical, electric power, metallurgical machinery and environmental protection fields. Such as oil well temperature and pressure measurement, diesel engine common rail temperature and pressure measurement, injection machinery temperature and pressure measurement.
Sino-Inst is a manufacturer of Combined Pressure and Temperature Sensor in China. Committed to the manufacture, sales and engineering support of Combined Pressure and Temperature Sensors.
Applications of Combined Pressure and Temperature Sensor
Aerospace
Analytical Instruments
Hydraulics
Hydrogen (Consult factory for media compatibility)
Test Stands
HVAC
Alternative energy management
Engine Controls & Monitors
Why use a Dual Pressure and Temperature Sensor?
Temperature and pressure integrated dual-function type: pressure, temperature measurement. The main reason for using dual pressure and temperature sensors is to save space. It can be widely used in the occasions where pressure and temperature need to be measured simultaneously in industrial control detection.
The integrated temperature coefficient organically integrates the temperature sensing element (thermal resistance or thermocouple) with the signal conversion and amplification unit. Thermocouple types are: J, K, E type or PT100 platinum resistance. Integrated structure of temperature and pressure. Simultaneously measure the medium pressure and temperature at the same point. It is suitable for measuring the temperature of the medium while measuring the pressure.
Working principle of Pressure and Temperature sensor
Thermocouples or thermal resistance sensors convert the measured temperature into electrical signals. Then send the signal to the input network of the transmitter. The network contains related circuits such as zero adjustment and thermocouple compensation.
The signal after zero adjustment is input to the operational amplifier for signal amplification. The amplified signal is output with 4-20ma DC current after being calculated and processed by the v / i converter. The other channel is processed by the a / d converter and displayed on the meter header.
There are two types of transmitter linearization circuits, both of which use feedback. For the RTD sensor, use positive feedback to correct it. For the thermocouple sensor, the multi-section broken line approach method is used for correction.
Ultra-High Pressure Senors
Sanitary Pressure Transmitter
Flush diaphragm pressure sensor
Melt Pressure Sensors/Transducers – High Temperature
Sino-Inst offers pressure and temperature sensors. A wide variety of pressure and temperature sensor options are available to you. Such as free samples, paid samples. Sino-Instrument is a globally recognized manufacturer of pressure and temperature sensors, located in China.
Sino-Inst sells through a mature distribution network that reaches all 30 countries worldwide. Pressure sensors products are most popular in Europe, Southeast Asia, and Mid East. You can ensure product safety by selecting from certified suppliers. With ISO9001, ISO14001 certification.
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Wu Peng, born in 1980, is a highly respected and accomplished male engineer with extensive experience in the field of automation. With over 20 years of industry experience, Wu has made significant contributions to both academia and engineering projects.
Throughout his career, Wu Peng has participated in numerous national and international engineering projects. Some of his most notable projects include the development of an intelligent control system for oil refineries, the design of a cutting-edge distributed control system for petrochemical plants, and the optimization of control algorithms for natural gas pipelines.
High Temperature Pressure Sensor for pressure measurement of high temperature gas or liquid. Such as steam pressure. High temperature up to 800 ℃.
High Temperature Pressure Sensors from Sino-Inst operate beyond standard 85°C to 125°C ranges, withstanding temperatures up to 800°C. These pressure sensor high temperature devices offer stable and repeatable output in various industries like test and measurement and downhole tool operations.
Engineers can easily calibrate these sensors due to their accurate performance over a wide temperature range. Choose between millivolt and amplified designs to find the ideal High Temperature Pressure Sensor for your needs, ensuring precise measurements and optimized efficiency in demanding conditions.
Sino-Inst is a manufacturer of high temperature pressure sensors in China. Committed to the manufacture, sales and engineering support of high temperature pressure sensors.
High Temperature Pressure Sensor is used in industrial fields such as water plants, oil refineries, sewage treatment plants, building materials, light industry, machinery, etc. to achieve the measurement of liquid, gas and vapor pressure.
Can pressure transmitters measure high temperature media?
Customers often have such a question. So can pressure transmitters really measure high temperature media? The answer is yes.Of course, the pressure transmitter cannot directly contact the high-temperature medium. Prolonged contact with high-temperature media can easily damage the pressure sensor. Usually when measuring high temperature media, the pressure transmitter will be equipped with a stainless steel heat sink device. Avoid direct contact between the medium and the transmitter. A condensing tube can also be added on the basis of the heat sink to reduce the damage to the transmitter caused by excessive temperature.
High temperature-resistant pressure transmitters use Hessman connectors to keep the signal stable, the circuit design is constantly optimized, and the anti-interference ability is strong. The heat sink and core are fully combined to work normally at high temperatures.
High temperature-resistant pressure transmitter:
Adding stainless steel heat sink on the basis of standard type and industrial type is high temperature type product, divided into standard high temperature type and industrial high temperature type. 4 ~ 20mA output, voltage 0 ~ 5V / 1 ~ 5/0 ~ 10V, etc.
Standard high temperature type, all stainless steel structure, small size and easy installation. High temperature industrial type, cast aluminum housing, terminal output and simple wiring. When the current output is required, a digital display meter can be optionally provided.
Standard high temperature type, high temperature industrial type, optional intrinsically safe explosion-proof box isolation and explosion-proof.
The computer compensation technology is adopted, and the temperature drift is small. ± 0.01% FS / ℃ integrated circuit, high precision, strong anti-interference ability.
Applied in petroleum, chemical, steel, light industry, machinery and equipment, energy constant pressure variable frequency water supply and other industries pressure detection. When the temperature is quite high, a condenser tube or a condenser is still used.
Add-on High Temperature Adapter
Add-on High-Temperature Adapter can also be called a pressure buffer tube. The role is to cool the measured medium and smooth the pressure fluctuations. When the pressure of the liquid, steam, and condensable gas whose temperature is higher than 60 ℃ is detected, the source port of the pressure sensor installed locally shall have a ring-shaped condensation ring or a U-shaped condensation bend.
Add-on High-Temperature Adapter is mainly used in a high-temperature environments with permeable or saturated steam. Avoid direct contact with high-temperature fluid inside the pressure sensor.
Pressure transmitters are used for steam metering and pipeline monitoring.
The temperature in the steam pipeline is generally relatively high. The low is more than one hundred degrees Celsius, and the high is two to three hundred degrees Celsius.
The start and stop of the valve will also cause the pressure in the pipeline to fluctuate.
Today we are going to talk to you about what to pay attention to when measuring the pressure of steam pipes?
When measuring the pressure of the steam pipeline, a high-temperature pressure transmitter should be selected due to the high-temperature environment.
In fact, in steam conditions, it only needs to pass through the surface bend (condensation tube). After passing through the elbow, the steam will condense into water at the elbow. Insulate the temperature, so as to achieve a good cooling effect.
The pressure transmitter after passing through the elbow on the pipeline with insulation layer is basically at room temperature. If it is not insulated, the high temperature will rise, causing the temperature of all objects above the pipeline to rise.
Advantages: The use of bends can optimize the cost, and is compatible with the product.
The material selection of a good bend is high. It is thicker and more durable than the general watch bend on the market. Good pressure resistance. The price will be slightly more expensive.
The valve suddenly opens or closes, causing the pressure in the steam pipe to fluctuate suddenly.
Especially when the valve is opened, huge pressure fluctuations will cause the pipeline to vibrate violently. Even shocking.
The pressure transmitter will also withstand huge pressure in the pipeline. In severe cases, the core may be dented or even burst.
The prevention method is to install safety valves and accumulators, and open and close the valves slowly. Install a trap at the high point of the air discharge valve at the low point.
Some pressure transmitters will be protected by dampers and baffles.
The damper is a copper piece with a 4mm outer wire and a T-shaped thin through-tube structure inside. It can prevent the medium from directly impacting the diaphragm.
The baffle is placed on the front end of the core before assembling the core. Metal plate with holes. It also prevents the medium from directly impacting the diaphragm.
In the hydraulic machinery industry, there are a lot of equipment for pressure transmitters, which are often used for pressure control.
In this case, some pressure transmitters have internal wires and dampers in the standard pressure port. Can effectively alleviate the impact.
The hydraulic and mechanical pressures are all above 10MPa. Generally, the transmitter above 10MPa should be equipped with a damper as standard. If the pressure shock is severe, a baffle can be added to alleviate the shock.
A high pressure sensor is a device that converts the measured electrical parameters into DC current, DC voltage and isolates and outputs analog or digital signals.
The high pressure sensor usually adopts the selected foreign patch technology. The working principle is that the pressure of the measured pressure acts directly on the sensing piece of the sensor. The sensing piece produces a micro-displacement proportional to the pressure, and the resistance value of the sensor changes. And use the electronic circuit to detect this change. And convert and output a standard measurement signal corresponding to the pressure.
High temperature sensor is a kind of pressure sensor commonly used in industrial practice. It is widely used in various industrial automatic control environments.
The working principle of the high temperature sensor: the pressure of the wind pressure sensor acts directly on the diaphragm of the sensor. The diaphragm produces a micro-displacement proportional to the pressure of the medium. The resistance of the sensor changes. And the electronic circuit is used to detect this change. And The conversion outputs a standard signal corresponding to this pressure.
In HVAC systems, end sensors and controllers are the key components to ensure the smooth operation of the entire system and achieve energy-saving effects.
In the central air conditioner, the filter is used to filter the dust and impurities in the ventilation duct. The pressure sensor at the indoor vent is used to monitor the air pressure difference between the two ends of the filter at the air outlet. With the accumulation of time, the dust on the filter will accumulate more and more. It will gradually affect the air circulation of the filter. When the air circulation is not smooth, the air pressure difference between the two ends of the filter will continue to increase.
When the pressure sensor senses the pressure change, the upper computer receives the signal from the pressure sensor. When the signal value reaches the alarm point, it will start to alarm. It reminds the cleaning staff to replace or clean the filter. In addition to this role, the pressure sensor is also used to participate in the control of the air supply volume of the air outlet.
To measure pressure at high temperatures, you need a High Temperature Pressure Sensor designed to withstand extreme temperatures. These sensors typically use special materials and construction methods to ensure accurate and stable pressure readings even in environments with elevated temperatures.
Pressure sensor failures can result from several factors, including:
Overpressure: Exceeding the sensor’s rated pressure limit can cause permanent damage.
Temperature extremes: Prolonged exposure to temperatures outside the sensor’s specified range may cause sensor failure.
Mechanical stress: Physical damage, such as dropping or mishandling, can impact the sensor’s performance.
Corrosion: Exposure to harsh chemicals or corrosive substances can lead to sensor deterioration.
Electrical issues: Overvoltage, electromagnetic interference, or faulty wiring can damage the sensor’s electronics.
A pressure and temperature sensor is a combined device that measures both pressure and temperature in a single unit.
The pressure sensing element, usually a piezoresistive or capacitive element, converts the applied pressure into an electrical signal.
The temperature sensing element, often a thermocouple or RTD, measures the temperature by producing a voltage or resistance change proportional to temperature variations. The sensor’s output signals are then processed and converted into readable values.
A pressure sensor detects and measures the pressure of a fluid or gas. It converts the pressure into an electrical signal, which can be read and processed by control systems, instruments, or data acquisition devices. Pressure sensors can be used in various applications, such as monitoring pressure in pipelines, HVAC systems, automotive systems, and industrial processes.
What Is Static Water Pressure? Definition of Static Water Pressure: Static Water Pressure refers to the pressure on water when it is stationary or moving in a straight line at…
What is a ceramic pressure sensor? Ceramic pressure sensors are sensor diaphragms made of ceramic alumina (Al2O3). Ceramic is a material with high elasticity, corrosion resistance, wear resistance, impact, and…
The Hydrostatic Pressure Transmitter measures the hydrostatic pressure exerted by a hydrostatic head. Use these hydrostatic pressure transmitters to measure the liquid level in storage tanks, processing vessels, collection tanks,…
4-20mA to 0-10v voltage, this is I/V conversion. That is current-voltage conversion, usually used for long-distance signal transmission in the industry. How to convert a 4-20mA to 0-10V /1-5V signal?…
Intrinsically safe type is an explosion-proof type of electrical equipment. When purchasing electrical equipment, do you often hear about intrinsic safety? For example, when ordering pressure transmitters or flow meters…
What does SCADA stand for? SCADA is the abbreviation of Supervisory Control And Data Acquisition. Namely data acquisition and monitoring control system. SCADA system is also called monitoring configuration software,…
What is a pressure sensor? A pressure sensor is a device that senses a pressure signal and converts the pressure signal into a usable output electrical signal according to certain…
Cryogenic pressure transducer for low temperature pressure measurement. -196℃～+125℃、-260℃/-350c（especial）. Sino-Inst offers a variety of Pressure Sensors for pressure measure and control. If you have any questions, please contact our sales…
Dynamic pressure sensor, the transmitter is a high frequency sensor. Sino-Inst offers a variety of Dynamic Pressure Sensors for pressure measurement. If you have any questions, please contact our sales…
Intelligent Pressure Transmitter is also called smart pressure transmitter. As far as the composition structure of intelligent pressure transmitters widely used in the market is concerned, it mainly includes devices…
Differential pressure transmitter installation guide helps you solve the installation problem of DP Transmitters. Sino-Inst offers a variety of differential pressure transmitters for pressure/level/flow measurement. If you have any questions,…
In the chemical production, the medium often encounters problems such as impurities, crystal particles or agglomeration. It is easy to block the connecting pipeline. At this time, a flange-type differential…
Sino-Inst offers high temperature Pressure Sensors/Transducers. A wide variety of high temperature Pressure sensors options are available to you. Such as free samples, paid samples. Sino-Instrument is a globally recognized manufacturer ofhigh temperature Pressure sensors, located in China. Sino-Inst sells through a mature distribution network that reaches all 30 countries worldwide. Pressure sensors products are most popular in Europe, Southeast Asia, and Mid East. You can ensure product safety by selecting from certified suppliers. With ISO9001, ISO14001 certification.
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Wu Peng, born in 1980, is a highly respected and accomplished male engineer with extensive experience in the field of automation. With over 20 years of industry experience, Wu has made significant contributions to both academia and engineering projects.
Throughout his career, Wu Peng has participated in numerous national and international engineering projects. Some of his most notable projects include the development of an intelligent control system for oil refineries, the design of a cutting-edge distributed control system for petrochemical plants, and the optimization of control algorithms for natural gas pipelines.
Melt pressure transducers work for pressure measurement & control of melt under high temperature.
SI-PT series melt pressure sensors work for high temperature melt pressure measurement and control. SI-PT series high temperature melt pressure sensor has the advantages of high accuracy. Good stability. Large output signal. Good dynamics and strong versatility. Melt pressure sensors are widely used in: Gas pipe production lines. Plastic pipe production line. Geonet unit. Single corrugated pipe production line. Core layer foamed pipe production line. Plastic sheet (sheet) extrusion line. Polystyrene foam pipe production line. Film blowing unit, extrusion unit, PE stretch film unit, etc.
Sino-Inst’s also offers hazardous location melt pressure transducer just as you need.
Sino-Inst is a manufacturer of high temperature melt pressure sensors in China. Committed to the manufacture, sales and engineering support of high temperature melt pressure sensors.
High accuracy. Stable and reliable. The output signal is large. Good dynamic performance. Strong versatility
Specifications
1: Pressure range: 0 ～ 5MPa ～ 100MPa; 2: Accuracy: + 0.5% FS; + 1.0% FS; 3: Working power: 10VDC (6–12VDC); 4: Output signal: 0 ~ 5V; 0 ~ 10V; 4-20mA; 5: Calibration method: 80% FSO + 1%; 6: Probe temperature resistance: 300 ℃; 7: Temperature drift: ≤0.30Mpa / 100 ℃; 8: Electrical connection: universal five-core connector; military five-core connector; 9: Overload pressure: 1.5 * FS; 10: Mechanical connection: 1/2 “-20UNF, M14 * 1.5, M22 * 1.5, G3 / 4 and other multi-thread sizes; 11: Anti-corrosion and wear-resistant coating: suitable for pressure measurement of high-concentration rough media, which can increase the applicable life 3-5 times;
Applicaitons
Widely used in petroleum, chemical fiber, plastic, rubber and other industries.
Model
SI-PT112 melt pressure transmitter
Description
PT112 series rigid rod high-precision pressure transmitter is mainly used for various occasions that require accurate data measurement. This product uses special material and alloy elastic diaphragm to reduce temperature drift and improve measurement accuracy. The zero full scale can be adjusted, and the amplified signal is directly input to the PLC, and the internal 80% calibration.
Features
High precision. Stainless steel package. Easy to install. Can replace similar imported products. 80% internal alignment. Good stability repeatability.
High temperature fluid media in chemical fiber spinning, polyester, and other equipment.
Model
SI-PT123 flexible high temperature melt pressure transducer
Description
PT123 flexible hose-type melt pressure sensor, which is equipped with a temperature sensor, can achieve the same point pressure and temperature measurement.
Features
High precision; Stainless steel package; Easy installation; Can completely replace similar imported products; 80% internal calibration; Good stability and repeatability
Rigid rod, hose isolation, diaphragm isolation structure, PT124 high temperature melt pressure sensor can be completely interchangeable with similar products such as American Dynisco, GEFRAN, RKC.
1. Pressure range: optional within 0 ～ 5MPa ～ 200MPa; 2. Accuracy: + 0.25% FS; + 0.5% FS; 3. Input voltage: 10VDC (6–12VDC); 4. Output signal: 1.5mv / v, 2.0mV / V, 3.3mV / V; 5. Calibration method: 80% FSO + 1%; 6. Probe temperature resistance: 450 ℃; 7. Temperature drift: ≤0.30Mpa / 100 ℃; 8. Electrical connection: universal five-core connector; 9. Overload pressure: 1.5 * FS; high temperature melt pressure transmitter 10.Mechanical connection: 1/2 “-20UNF, M14 * 1.5, M18 * 1.5, M22 * 1.5, and other multi-thread sizes; 11. Anti-corrosion and wear-resistant coating: suitable for pressure measurement of high-concentration rough media, which can increase the applicable life 3-5 times;
Applicaitons
Pressure measurement and control of high temperature fluid media used in chemical fiber spinning, polyester, rubber and plastic machinery.
Model
SI-PT127 high temperature melt pressure sensor
Description
PT127 high temperature melt pressure sensor is mainly used in various occasions that require accurate data measurement. This product uses special material and alloy elastic diaphragm to reduce temperature drift and improve measurement accuracy.
Features
Rigid rod, hose isolation, diaphragm isolation structure. Good stability and accuracy;
Specifications
1. Range: 0 ~ 5 ~ 200MPa 2. Comprehensive accuracy: 0.5% FS; 1% FS 3. Output signal: 1.5mV / V; 2mV / V; 3.33mV / V 4. Power supply voltage: 10VDC 5. Temperature model: J, K, E, PT100 6. Diaphragm temperature resistance: 450 ℃ 7. Electrical connection: 5-pin connector 5 pin 8. Process connection: M22 × 1.5; special design
Applicaitons
Measurement and control of pressure and temperature of high temperature fluid media of chemical fiber spinning, polyester, rubber and plastic machinery and other equipment.
Model
SI-PT131 high temperature melt pressure and temperature transducer
Description
PT131 has good stability and accuracy. It is completely interchangeable with similar products such as Dynisco, GEFRAN, RKC, etc.
1: Pressure range: optional within 0 ～ 5MPa ～ 200MPa 2: Accuracy: + 1.0% FS; + 0.5% FS; 3: working power: 10VDC (6–12VDC); 4: Output signal: PT131 series: 1.5mv / v, 2.0mV / V, 3.3mV / V 5: Calibration method: 80% FSO + 1%; 6: Probe temperature resistance: 450 ℃ 7: Temperature Model: PT131 (E; J; K) 8: Electrical connection: PT131-series: universal seven-core connector 9: Overload pressure: 1.5 * FS 10: Mechanical connection: 1/2 “-20UNF, M14 * 1.5, M18 * 1.5, M22 * 1.5, etc. 11: Anti-corrosion and wear-resistant coating: suitable for pressure measurement of high-concentration rough media, which can increase the applicable life 3-5 times
Applicaitons
Pressure measurement and control of high temperature fluid media used in chemical fiber spinning, polyester, rubber and plastic machinery.
Model
SI-PT2616 flange high temperature melt pressure transmitter
Description
PT2616 flange high temperature melt pressure transmitter is a new pressure measuring transmitter launched by our company. It is used to measure high precision and pollution-free environment. The product combines the latest technology of the industry, using special elastic diaphragm and pressure Strain gauges. Greatly reduced measurement error, more stable and more wear-resistant.
Features
High precision, stainless steel material sealing, simple installation, good stability, zero degree full scale adjustable, linear output can be directly PLC, good working characteristics and explosion-proof.
Specifications
1. Pressure measuring range: 0 ~ 5, 0 ~ 200Mpa 2. Accuracy: ≤ ± 0.5% full scale 3. Signal output: 1.5mv / v, 2.0mV / V, 3.3mV / V 4. Input voltage: 10VDC (6-12) VDC 5. Electrical connection: 6-pin universal aviation plug 6. Mechanical connection: flange connection, size can be customized 7. Diaphragm temperature resistance: 300 ℃ 8. Overpressure: 1.5% full scale
Applicaitons
This product is suitable for measuring the pressure of high temperature melt and the measurement of melt of plastic, plastic, rubber, chemical fiber and other extruder and extruder.
Model
SI-PT292 explosion-proof high temperature melt pressure transducer
Description
The PT292 series is an intelligent 4-20mA pressure transmitter designed for use in hazardous areas. PT292 high temperature melt pressure transducer type products have passed the Class 1, Division I, Groups A, B, C and D explosion-proof certification. Explosion-proof products include wire connections. Type PT292 is ATEX II 1 G 100a certified and Eex ia IIC 0 and 1 zone intrinsically safe. This intrinsically safe and ATEX version is available with either a connection wire connection or a 6-pin connection.
Features
Configurable by hand； Repeatable precision pressure measurement； Direct output to DCS or PLC; Users can precisely adjust the pressure range; Certification for use in hazardous environments; Meets new EC requirements
Specifications
1. HARTTM Digital Communications 2. Comprehensive error better than ± 0.25% 3. 4-20mA loop-powered output 4. 0-500 to 0-30,000 psi 5. Ex, intrinsically safe or ATEX certified
Applicaitons
Pressure measurement and control of high temperature fluid media used in chemical fiber spinning, polyester, rubber and plastic machinery.
The working principle of the melt pressure sensor is that the pressure of the medium directly acts on the diaphragm of the sensor. The diaphragm produces a micro-displacement proportional to the pressure of the medium. The resistance of the sensor changes. The change is detected by electronic circuits. The conversion outputs a standard signal corresponding to this pressure.
Precautions for buying high temperature melt pressure sensors
1. What kind of pressure is being measured. Generally, the maximum pressure range of the high temperature melt pressure sensor you need should reach 1.5 times the maximum pressure value of your system. All high temperature melt pressure sensors are designed to withstand the maximum pressure for 200 million cycles without degrading performance. You need to find a compromise solution between system performance and high temperature melt pressure sensor life.
2. Consider the type of media that needs to be measured. The key factor to consider when selecting a high temperature melt pressure sensor is the medium being measured. Will it be a viscous liquid or a slurry on the pressure head? Is the contact with the high temperature melt pressure sensor a soluble or corrosive medium or clean dry air? This question determines whether impact dies are needed and what materials are used to make contact with the media.
3. Consider the accuracy you need to achieve. Accuracy is a term commonly used by manufacturers to describe the output error of high temperature melt pressure sensors. The cost of having a higher accuracy high temperature melt pressure sensor will be higher. Then your system really needs such high accuracy ? A system consisting of a high-precision high-temperature melt pressure sensor and a low-resolution instrument is actually a low-efficiency solution.
4. Carefully consider the temperature resistance, interchangeability, time stability and ruggedness of the high temperature melt pressure sensor to be purchased.
5. What output method does the high temperature melt pressure sensor you want to use. The required excitation voltage, and how to connect the high temperature melt pressure sensor to your electrical system.
The correct installation position of the high temperature melt transmitter on the process pipeline is related to the measured medium. In order to obtain the best measurement results, pay attention to several points:
Prevent the transmitter from coming into contact with corrosive or hot media;
When measuring liquid pressure, the pressure taking port should be opened on the side of the process pipeline to avoid sedimentation;
Prevent dross from depositing in the duct;
When measuring the gas pressure, the pressure taking port should be opened at the top of the process pipeline, and the transmitter should also be installed at the top of the process pipeline so that the accumulated liquid can be easily injected into the process pipeline;
When freezing occurs in winter, it is necessary to take anti-freezing measures according to the transmitter installed outdoors to avoid the expansion of the liquid in the pressure port due to the freezing volume, leading to damage to the sensor;
When wiring, pass the cable through the waterproof joint or flexible pipe and tighten the sealing nut to prevent rainwater, etc. from leaking into the transmitter housing through the cable;
When measuring the liquid pressure, the installation position of the transmitter should avoid the impact of the liquid to avoid damage to the sensor due to overpressure.
Maintenance
High temperature melt transmitters are required to be checked once a week. Check every month. It is mainly to remove dust from the instrument. Carefully inspect electrical components. Always check the output current value. There is weak current inside the pressure transmitter. Be sure to keep it away from strong external electricity.
extrusion melt pressure transducer
In plastic and rubber extrusion production lines, melt pressure sensors play an important role in improving melt quality, improving production safety and protecting production equipment. At the same time, the high temperature melt pressure sensor is a very sensitive element. Only proper installation and maintenance can make it work to its fullest.
In the extrusion production process, some quality standards of the product (such as dimensional accuracy or the surface flatness of the parts added with mineral fillers, etc.) require optimal control of the extrusion pressure. Melt pressure sensor is an important element to achieve this requirement. By setting the melt pressure sensor and pressure control device at the mold inlet connection. It can make the product more stable and can reduce the waste of materials.
In addition, measuring the pressure across the screen and the melt pump is very important to ensure the safety of production and the optimal performance of the equipment. If the flow of the melt into the mold is blocked, a sensor under the screen will alert the operator (which can be done via a meter) to alert the operator.
When a sensor upstream of the filter sounds an alarm, it indicates that the pressure inside the extruder is too high, possibly causing excessive wear on the screw. For manufacturers applying melt pumps, it is necessary to measure the inlet and outlet pressures of the melt medium. To ensure that the melt medium can continuously flow into the mold. Because of any obstruction, the melt pump may be blocked.
A pressure sensor equipped on an extrusion line can measure the pressure at only one point, or it can be a series of sensors used to measure the entire line. Melt pressure sensor is connected with data recorder and sound alarm device. The processing parameters of the extruder can be adjusted using the processing control system.
Common faults of high temperature melt pressure sensor digital instruments
High temperature melt pressure gauge with black screen. Make a preliminary judgment as to whether the 220v power supply line is faulty. The pressure gauge may burn out.
Word skip appears on the pressure gauge. Preliminarily judge whether the connection of the signal line between the sensor and the pressure instrument is bad; whether the shield line is connected to the ground. There are interference signals at the scene. (Poor contact between the welding points inside the meter).
The upper window of the meter displays —- or 0000. The signal cable between the sensor and the meter may be connected incorrectly. Or the sensor leads are broken.
The pressure display on the upper window of the meter does not rise but decreases, which may be the damage of the sensor diaphragm.
The pressure gauge functions normally, that is, the pressure cannot reach the target value. Check the sensor threads. Installing too shallow or too deep may cause it. Adjusting the torque to the normal range pressure shows normal;
The high temperature melt pressure gauge shows a negative number. Cannot clear calibration. The high-temperature melt pressure gauge is subjected to an instantaneous strong current shock, which causes damage to the instrument protection components.
Melt pressure transducers are common spares on extrusion lines to measure the pressure and/or temperature of materials in pipes. The design structure of the product is to stick the four strain gauges that make up the bridge circuit on the diaphragm at the other end of the capillary tube according to the principle of circular diaphragm compression. During measurement, the melt presses the pressure-sensitive diaphragm, which transmits the pressure to the diaphragm at the other end through the filling medium. The diaphragm is deformed, and the strain is attached to the strain gauge.
Before the calibration operation, first, the Melt pressure transducers are stopped, second, the operating temperature is within the operating temperature, and third, the temperature compensation is adjusted to zero.
Melt pressure transducers are available in temperature compensated grades, which are selected based on the medium filled in the capillary tube in the sensor. The physical properties of the filling medium are directly related to the zero degree output level.
When assigning ranges with the meter, this value needs to be taken into account and adjustments made to compensate. A calibration adjustment acts like setting a balance, think of temperature compensation as the packaging of the item being weighed.
The temperature compensation for 3 different media is as follows:
Hg (mercury) = 15 psi/ 100°F or 27 psi/ 100°C
Oil = 36 psi/100°F or 65psi/100°C
NaK (Sodium Potassium) = 30 psi/ 100°F or 54psi/ 100°C
Example: Process temperature = 200°C, mercury filled, signal output 60psi @ zero pressure
① According to the full scale pressure range of the sensor, this offset is outside the normal combined error specification. The pressure range is 10,000 psi, the combined error is 0.5%, and the compensation is actually 110 psi. ② Remember that when we perform calibration, there is no change to the signal output, only to ensure that the output is within the tolerance range of the specification. ③The design of the meter is easy to process calibration, and it only takes a few cases to test the high/low limit range of the output.
A pressure transmitter refers to a pressure sensor whose output is a standard signal, and is an instrument that accepts a pressure variable proportionally converted into a standard output signal. It can convert physical pressure parameters such as gas and liquid sensed by the load cell sensor into standard electrical signals. Measurement, indication and process adjustment are carried out by supplying secondary instruments such as indicating alarms, recorders and regulators.
If you want the pressure transmitter to be washable, you should consider installing the pressure transmitter on the barrel before the filter or before and after the melt pump or in the mold.
All pressure transmitter connections should be removed before cleaning the body with a wire brush or detergent. Because these two cleaning methods may damage the diaphragm of the pressure transmitter and the insulation of the wiring.
When heated cleaning is required, the pressure transmitter should also be removed and the top wiped with a soft, non-abrasive cloth. At the same time, the holes of the pressure transmitter also need to be cleaned with soft tools.
There are different types of pressure transducers based on their design.
These sensors can come in several shapes and sizes, but the technology inside can also differ.
There 4 main types of pressure sensors based on this:
Flat Pressure Sensor is a type of pressure sensor that specifically refers to the measurement diaphragm without pressure holes. Also known as a flat film…
What Is Resistive Pressure Transducer? Resistive pressure transducers are also called resistance pressure transducers. It is a commonly used pressure sensor. Pressure sensors are generally…
What is underwater pressure transducer? Underwater pressure transducer refers to a type of pressure sensor that can be used underwater for a long time. The…
High Temperature Pressure Transducer is also called High Temperature Pressure Sensor, or High Temperature Pressure Transmitter. The High Temperature Pressure Transducer is used for applications…
What is a ceramic pressure sensor? Ceramic pressure sensors are sensor diaphragms made of ceramic alumina (Al2O3). Ceramic is a material with high elasticity, corrosion…
Intrinsically safe type is an explosion-proof type of electrical equipment. When purchasing electrical equipment, do you often hear about intrinsic safety? For example, when ordering…
The Hydrostatic Pressure Transmitter measures the hydrostatic pressure exerted by a hydrostatic head. Use these hydrostatic pressure transmitters to measure the liquid level in storage…
What is a piezoelectric pressure sensor? The piezoelectric pressure sensor is a sensor that uses the piezoelectric effect of piezoelectric materials to convert the measured…
An Air pressure transducer is a sensor that converts the mechanical signal of air pressure into a current signal. Pressure has a linear relationship with…
Differential pressure transmitter installation guide helps you solve the installation problem of DP Transmitters. Sino-Inst offers a variety of differential pressure transmitters for pressure/level/flow measurement…
Intrinsically safe vs explosion proof is a common function of pressure transmitters. When pressure transmitters need to be used in high-risk and explosive places, you…
What is Calibrate a Pressure Transmitter? Calibrate a Pressure Transmitter is an important step to help pressure transmitters make accurate measurements. Only when the input…
Sino-Inst is Manufacturer of Melt Pressure Transducers. We supply more than 20 kinds of Melt Pressure Transducers. 90% Melt Pressure Transducers are used for precise measurement and control of high temperature such as rubber, plastic, chemical fiber, polyester nylon, polyester, steam, etc.
Sino-Inst’s high temperature Melt Pressure Transducers are used in the pressure measurement of high temperature melt, fluid and gas medium in chemical fiber spinning, polyester rubber, plastic rubber and plastic, extrusion machinery, non-woven non-woven, construction packaging materials and other equipment.
High temperature melt pressure sensor is used for pressure measurement and control of high temperature fluid medium in chemical fiber spinning, polyester, rubber and plastic machinery and other equipment.
Melt Pressure Transducers enable stable pressure measurement with high temperature. This greatly meets the measurement needs of many applications.
Sino-Inst’s Melt Pressure Transducers, made in China, Having good Quality, With better price. Our pressure measurement instruments are widely used in China, India, Pakistan, the US, and other countries.
The entire team at Sino-Inst’s has received excellent training, so we can ensure that every client’s needs are met. For assistance with your product requirements, whether it’s a Melt Pressure Transducers, level sensor, or other device, give us a call.
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Wu Peng, born in 1980, is a highly respected and accomplished male engineer with extensive experience in the field of automation. With over 20 years of industry experience, Wu has made significant contributions to both academia and engineering projects.
Throughout his career, Wu Peng has participated in numerous national and international engineering projects. Some of his most notable projects include the development of an intelligent control system for oil refineries, the design of a cutting-edge distributed control system for petrochemical plants, and the optimization of control algorithms for natural gas pipelines.
High pressure transducer is used to measure high pressure up to 1500Mpa. Also called ultra high pressure transducer.
High pressure transducer adopts ultra high pressure design. Suitable for high pressure applications up to 15000bar. SI-702S series ultra high pressure pressure transducer can provide reliable ultra-high pressure measurement. Ultra high pressure transmitter adopts rare metal alloy material. After special process treatment, integrated design. All stainless steel welding package. Laser resistance temperature compensation. With high performance digital processing circuit. The factory has undergone high and low temperature aging and long-term fatigue tests. Good long-term stability. Ultra-long working life. Maintain safe and stable operation in the ultra-high pressure range.
Sino-Inst offers a variety of High pressure transducers for industrial pressure measurement. If you have any questions, please contact our sales engineers.
Ball head M20 × 1.5, cone head M20 × 1.5, M22 × 1.5, etc. Other threads can be designed according to customer requirements.
Ultra high pressure quick connector-1 / 4NPT 3 / 8NPT high pressure connector
Features: High-strength carbon steel. Galvanized surface treatment. Check valves at both ends. Steel ball lock. Interchangeable with ENERPAC / parker3000. Thread: 1 / 4NPT. 3 / 8NPT Working temperature: -30-100 ℃ Maximum working pressure: 10000psi (700bar) Features: High-strength carbon steel, galvanized surface, check valves at both ends, steel ball lock, 2 times safety factor. Product description: The HP high-pressure series is designed for use in high-pressure environments. All metal parts are made of steel. The base of the female connector is treated by QPQ. The base of the male connector is treated by all black galvanizing.
SI-702s High pressure transducers types
SI-702Q Ultra-High Pressure Sensor
SI-702Q Ultra High pressure transducer adopts spherical sealing method. It can choose 0-20mV, 4-20mA, 0-5VDC output. The ultra-high pressure pressure transmitter uses fully integrated rare alloy materials. Fine machining. Multiple heat treatment processes. Each sensor undergoes rigorous pressure testing to ensure absolute safety and reliability. The sensor has high accuracy, long-term stability, and long life specialty.
SI-702Z Ultra High Pressure Sensor
SI-702Z Ultra High pressure transducer is an extended product of 702S. It is characterized by a 58 degree outer cone seal. The ultra-high pressure structure and processing technology ensure the long-term reliability of the product. High accuracy, long life, and various electrical interfaces to choose from.
SI-702W Ultra High Pressure Sensor
SI-702W Ultra High pressure transducer, M20 × 1.5 external thread with 60 degree inner cone seal. Fine machining, multiple heat treatment processes. Each sensor undergoes rigorous pressure test and high and low temperature aging. It guarantees absolute safety and reliability. The sensor has the characteristics of high accuracy, good stability and long life. Various electrical interfaces are available.
SI-702N Ultra High Pressure Sensor
SI-702N Ultra High pressure transducer, M20 × 1.5 internal thread with 60 degree inner cone sealing method. Each sensor has undergone strict pressure test and aging. It guarantees absolute safety and reliability. It has high accuracy, long-term stability and long life. Features. A variety of shapes can be selected and a variety of electrical interfaces can be selected.
Applications of SI-702S Ultra High pressure transducer
SI-702S Ultra-High Pressure Transducer is designed for high pressure hydraulic circuit applications. The electronic components with excellent stability are selected and the voltage and current output signals are used. Therefore, SI-702S Ultra-High Pressure Senors is used in applications that require long-distance transmission signals or intelligent control and detection systems.
High pressure transducer is a pressure transmitter suitable for high pressure measurement and control.
Sino-Inst high pressure transducer has gone through thousands of fatigue impact tests and several days of low and medium temperature aging cycles before leaving the factory. It has solved the disadvantages of high pressure sensors in terms of stress and zero instability. Provide customers with reliable products for high voltage measurement. The pressure of SI-702 series can reach 600MPa. The precision level is high, and the mature production technology can ensure the long-term stability of the sensor with excellent characteristics. SI-702 series pressure sensors are suitable for oil extraction platforms, water flow equipment, high pressure measurement equipment, hydraulic control systems, test benches and industrial automation control.
A pressure sensor (Pressure Transducer) is a transmitter that can sense pressure signals and convert them into usable output electrical signals according to certain rules. The pressure sensor usually consists of a pressure sensitive element and a signal processing unit. According to different test pressure types, pressure sensors can be divided into gauge pressure sensors, differential pressure sensors and absolute pressure sensors.
How do you test a pressure transducer?
Today I will mainly introduce three common detection methods for pressure sensors. Hope it helps everyone. 1. Pressure test. The method of detection is to power the sensor. Use your mouth to blow the air hole of the pressure sensor. Use the voltage file of a multimeter to detect the voltage change at the output of the sensor. If the relative sensitivity of the pressure sensor is large. This amount of change will be obvious. If nothing has changed. You need to use a pneumatic source to apply pressure instead. 2. Zero point detection. Use the voltage file of a multimeter. Detect the zero output of the sensor under no pressure. This output is generally mV level voltage. If the technical specifications of the sensor are exceeded, the zero deviation of the sensor is out of range. 3. Detection of bridges. It mainly detects whether the circuit of the sensor is correct. It is generally a Wheatstone full-bridge circuit. Use the ohm file of the multimeter to measure the impedance between the input terminals and the impedance between the output terminals. These two impedances are the input and output impedances of the pressure sensor. If the impedance is infinite, the bridge is disconnected. It means there is a problem with the sensor or the definition of the pin is not correct.
How does a 3 wire pressure transducer work?
The output signal of the two-wire pressure transmitter is generally 4-20MA. The supply voltage is 24VDC. The two wires are a red (representing positive 24V power supply), and a black or blue (representing positive signal output). The wiring method is that the red wire is connected to the positive source and the blue wire is connected to the signal positive, and then the power supply negative and the signal negative are shorted. The three-wire pressure transmitter is generally a voltage output. Wire one (red power supply is positive), one black (power supply is negative), and one yellow (signal output is positive). The output ground is common to the power supply.
Why shouldn’t you use a pressure transducer with high oxygen environment?
Oxygen plays an important role in the smelting process, chemical industry, national defense industry, and healthcare. However, the process of oxygen production and use is extremely prone to combustion and explosion. The analysis is based on the mechanism of the “three elements” of combustion and explosion (combustible materials, oxidants, and excitation energy). The high-purity high-pressure oxygen transported in the oxygen pipeline is a very strong oxidant. The higher the purity, the higher the pressure, the stronger the oxidation, the more dangerous. The potential sources of excitation energy for combustion or explosion are roughly the following: friction, compression heat, impact force, arc, resonance, etc. In the construction of industrial oxygen pipelines, multiple cleaning processes such as derusting, scrubbing, sand blasting, blowing, degreasing, and acid cleaning should be carried out. Remove the oil and impurities in the pipeline to make it reach the condition of transporting oxygen medium. Check and accept according to relevant standards, and use it after passing the test. For oxygen pressure measurement, choosing a clean instrument filled with inert oil not only improves the safety level, but also greatly reduces the risk of economic and time loss caused by maintenance or failure replacement. Sino-Inst pressure sensor for oxygen measurement Accuracy: ± 0.15% FS Fill with Fluorolube® oil to ensure no oxidation reaction Oil-free production process, oxygen-level cleaning process Φ19mm standard OEM pressure / differential pressure sensor Constant current / constant voltage power supply All stainless steel 316L material
Sino-Instrument offersHigh pressure sensors. A wide variety of HighPressure sensors options are available to you. Such as free samples, paid samples. Sino-Instrument is a globally recognized manufacturer ofHigh Pressure sensors, located in China. Sino-Instrument sells through a mature distribution network that reaches all 30 countries worldwide. Pressure sensors products are most popular in Europe, Southeast Asia, and Mid East. You can ensure product safety by selecting from certified suppliers. With ISO9001, ISO14001 certification.
Request a Quote
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Wu Peng, born in 1980, is a highly respected and accomplished male engineer with extensive experience in the field of automation. With over 20 years of industry experience, Wu has made significant contributions to both academia and engineering projects.
Throughout his career, Wu Peng has participated in numerous national and international engineering projects. Some of his most notable projects include the development of an intelligent control system for oil refineries, the design of a cutting-edge distributed control system for petrochemical plants, and the optimization of control algorithms for natural gas pipelines.
High pressure sensor is pressure transmitter designed for high pressure measure&control. 0 ～ 40MPa… 600MPa.
High pressure sensor elastic body adopts special material and integrated structure design. SI-702 high pressure sensor has no burst phenomenon during high voltage measurement and control. The high pressure sensor is used under high pressure, differential high pressure and high pressure shock conditions. High pressure sensors are suitable for pressure measurement & control of large hydraulic equipment. SI-702 high pressure sensor adopts spherical or cone seal to ensure the tightness of high voltage system. Such sensor also referred to as: high pressure pressure sensor, high pressure transmitter.
Sino-Inst offers a variety of High Pressure sensors for industrial pressure measurement. If you have any questions, please contact our sales engineers.
Combined Pressure and Temperature Sensor-Dual function
High Temperature Pressure Sensor
Melt Pressure Sensors/Transducers – High Temperature
Gas Pressure Sensor
Flush diaphragm pressure sensor
Digital Pressure Sensor
Sanitary Pressure Transmitter
Pressure Transducer 4-20mA/Voltage
Features of SI-702 High Pressure Sensor
Adopt resistance strain gauge pressure sensor chip. The selected patch technology has zero point, full scale compensation and temperature compensation;
High precision and high stability amplifier integrated circuit;
Micro-mechanical processing technology, integrated structure of measuring diaphragm and pressure interface. Impact resistance, fatigue resistance, high reliability;
Integrated design product will not rupture under pressure of 1100MPA, ensuring product safety
Diversified output signals (general-purpose analog output, digital RS485 / RS232 output, GPRS wireless transmission);
Small structure, minimum outer diameter can reach 26mm. Can be directly matched with local display meter (output is 4-20mA two-wire system);
High pressure transducer is a pressure transmitter suitable for high pressure measurement and co
A high pressure sensor is a device for high pressure measurement of gases or liquids. A high pressure sensor usually acts as a transducer; it generates a signal as a function of the pressure imposed. Such a signal is electrical 4-20mA， 0-5V，etc.
High Pressure sensors are used for control and monitoring in thousands of everyday applications. High Pressure sensors can also be used to indirectly measure other variables such as fluid/gas flow, speed, water level, and altitude. High Pressure sensors can alternatively be called High pressure transducers, High pressure transmitters, High pressure senders, High pressure indicators, piezometers and manometers, among other names.
Sino-Inst high pressure sensor has gone through thousands of fatigue impact tests and several days of low and medium temperature aging cycles before leaving the factory. It has solved the disadvantages of high pressure sensors in terms of stress and zero instability. Provide customers with reliable products for high voltage measurement. The pressure of SI-702 series can reach 600MPa. The precision level is high, and the mature production technology can ensure the long-term stability of the sensor with excellent characteristics. SI-702 series pressure sensors are suitable for oil extraction platforms, water flow equipment, high pressure measurement equipment, hydraulic control systems, test benches and industrial automation control.
High Temperature Pressure Sensor with high temperature resistant pressure core or sapphire core as pressure measurement material. After high reliability amplifier circuit and precise temperature compensation. The absolute or gauge pressure of the measured medium is converted into standard electrical signals such as 4 ~ 20mA, 0 ~ 5VDC, 0 ~ 10VDC. It is also widely used in industry. Collect pressure signals at the points of some high-temperature steam and fluid pipes.
1. The key points in the use of pressure sensors and the correct installation position of the transmitter on the process pipeline are related to the measured medium. Only by mastering the correct use of the pressure sensor can the best measurement results be obtained!
2. Prevent the transmitter from coming into contact with corrosive or hot media.
3. Prevent dross from depositing in the duct.
4. When measuring liquid pressure, the pressure taking port should be opened on the side of the process pipeline to avoid sedimentation.
5. When measuring the gas pressure, the pressure taking port should be opened at the top of the process pipeline. The transmitter should also be installed at the top of the process pipeline so that the accumulated liquid can be easily injected into the process pipeline.
6. The pressure guiding tube should be installed in a place with small temperature fluctuations.
7. When measuring steam or other high-temperature media, a condenser such as a buffer tube (coil) must be connected. The transmitter’s operating temperature should not exceed the limit.
Q&A
What is pressure sensor and how it works?
A pressure sensor is a device for pressure measurement of gases or liquids. Pressure sensors can also be used to indirectly measure other variables such as fluid/gas flow, speed, water level, and altitude. Pressure sensors can alternatively be called pressure transducers, pressure transmitters, pressure senders, pressureindicators, piezometers, and manometers, among other names. In short, a pressure sensor converts pressure into a small electrical signal, which is sent and displayed. Therefore, these are also commonly referred to as pressure transmitters. Two common signals used are 4 to 20 mA signals and 0 to 5-volt signals. Most pressure sensors work using the piezoelectric effect. This is when the material generates a charge in response to stress. This stress is usually compressive, but may be twisted, bent, or vibrated. Pressure sensors detect pressure and can determine the amount of pressure by measuring the charge. The pressure sensor needs to be calibrated in order to know what voltage or milliamp (mA) signal corresponds to what pressure. This is the basic “zero” and “span” calibration or minimum and maximum, which is a common job for maintenance personnel. Read more about: What is a pressure sensor and how it works?
What does a barometric pressure sensor do?
Air pressure sensor is an instrument used to measure the absolute pressure of gas. Air pressure sensor is mainly suitable for physical experiments related to gas pressure. It can also measure dry, non-corrosive gas pressure in biological and chemical experiments. The main sensing element of the air pressure sensor of the air compressor is a thin film that is sensitive to the pressure of the air pressure and a thimble opening control. In the circuit, it is connected with a flexible resistor. When the pressure of the measured gas decreases or increases, the thin film deforms to drive the ejector pin, and the resistance of the resistor will change. The resistance of the resistor changes. The signal voltage of 0-5V is obtained from the sensing element, and is received by the data collector after A / D conversion, and then the data collector transmits the result to the computer in an appropriate form. The main component of many air pressure sensors is a variable-capacitance silicon capsule. When the external atmospheric pressure of the variable-capacitance silicon membrane box changes, the thimble moves, and the single crystal silicon membrane box elastically deforms with it, thereby causing a change in the capacitance of the parallel plate capacitor of the silicon membrane box to control the air pressure sensor. More about Gas Pressure Sensor.
What are pressure sensors made of?
The pressure sensor is a device that detects pressure and converts the pressure signal into an electrical signal and outputs it linearly. Common types include strain gauge, piezoresistive, capacitive, piezoelectric, and vibration frequency pressure sensors. We use strain gauge pressure sensors as an introduction. It is mainly composed of 4 parts: elastomer, strain gauge, measuring circuit and transmission cable. Strain gauge pressure sensor measurement principle: When the pressure sensor elastic body is deformed under the action of external force. The strain gauge attached to the elastic body then bends. The resistance of the strain gauge changes. Then the measurement circuit converts the change in resistance into an electrical signal (usually a millivolt signal). Elastomer: Elastomer is the pressure sensor shell. The main materials are aluminum alloy, alloy steel and stainless steel. Strain gauge: The strain gauge pressure is an important part of the sensor. Commonly used strain gauge base material adopts polymer film material. The strained material is usually high-purity constantan. The strain gauge is attached to the elastic body through dehydration. The elastic body is deformed by force. The strain gauge then deforms. Thereby changing the resistance value. Measurement circuit: Transform the resistance change of the strain gauge into a millivolt signal output through the Wheatstone bridge. Transmission cable: 4-core shielded cable with four wires of red, black, green and white. Red: Power +. Black: Power-. Green: signal +. White: Signal-.
What is the difference between pressure switch and pressure sensor?
Pressure Switch: As the name suggests, a pressure switch is a switch. It’s just that this switch is the pressure set in advance. When the measured medium reaches this pressure level, the switch can automatically turn on or off. The pressure switch must be given a pressure value in advance. Then turn the switch on or off. They are used for simple control and are all digital outputs. Pressure Sensor: The pressure sensor can output not only analog signals but also digital signals. Digital signal processing is more convenient, and remote transmission is also possible. The pressure sensor is composed of a pressure sensitive element and a conversion circuit. Use the pressure of the measured medium to produce a small change in current or voltage output on the pressure sensitive element.
Sino-Inst offers High pressure sensors. A wide variety of High Pressure sensors options are available to you. Such as free samples, paid samples. Sino-Instrument is a globally recognized manufacturer of High Pressure sensors, located in China. Sino-Inst sells through a mature distribution network that reaches all 30 countries worldwide. Pressure sensors products are most popular in Europe, Southeast Asia, and Mid East. You can ensure product safety by selecting from certified suppliers. With ISO9001, ISO14001 certification.
Wu Peng, born in 1980, is a highly respected and accomplished male engineer with extensive experience in the field of automation. With over 20 years of industry experience, Wu has made significant contributions to both academia and engineering projects.
Throughout his career, Wu Peng has participated in numerous national and international engineering projects. Some of his most notable projects include the development of an intelligent control system for oil refineries, the design of a cutting-edge distributed control system for petrochemical plants, and the optimization of control algorithms for natural gas pipelines.
Gas Pressure Transducer for industrial gas pressure measurement. Pagoda gas nozzle Φ8. It is used to measure the pressure of weak corrosive gases such as natural gas and exhaust gas pressure sensor.
SI-503K Pagoda Joint Gas Pressure Transducer uses stainless steel as a whole. High-precision strain gage and advanced technology. It has high sensitivity, stable performance and good impact resistance. GB 304 stainless steel welding. Small and compact structure. Has good moisture resistance and excellent media compatibility. Can measure weakly corrosive liquids and gases.Widely used in industrial equipment: Water conservancy. Chemical, medical. Electric power, air conditioning. Vehicle braking and other pressure measurement and control.
Sino-Inst offers a variety of Gas Pressure Transducers for industrial pressure measurement. If you have any questions, please contact our sales engineers.
Gas pressure transducer is a special sensor that converts gas pressure into current and voltage signals.
For gas pressure measurement the solution of pressure sensor is used to accomplish the significance of measurement.
Pressure sensors for gas pressure measurement are mainly conversion devices used to measure the absolute pressure of gases.
It can be used for pressure measurement in terms of blood pressure, wind pressure, pipeline gas, etc. It has a stable and reliable performance.
It is mainly suitable for physical experiments related to gas pressure. Such as gas laws, etc. It can also be used in biological and chemical experiments to measure the pressure of dry, non-corrosive gases.
In short, a pressure sensor converts pressure into a small electrical signal, which is sent and displayed. Therefore, these are also commonly referred to as pressure transmitters. Two common signals used are 4 to 20 mA signals and 0 to 5 volt signals. Most pressure sensors work using the piezoelectric effect. This is when the material generates a charge in response to stress. This stress is usually compressive, but may be twisted, bent, or vibrated.
Pressure sensors detect pressure and can determine the amount of pressure by measuring the charge.
The pressure sensor needs to be calibrated in order to know what voltage or milliamp (mA) signal corresponds to what pressure. This is the basic “zero” and “span” calibration or minimum and maximum, which is a common job for maintenance personnel.
The price of gas pressure Transducers is mainly affected by the following factors:
Measuring medium
Does the gas contain particles?
Gas temperature
Gas corrosive
Explosion-proof performance
Interface size
Signal output, etc.
Gas pressure Transducer price reference range: USD80-800.00/pc
Natural gas pressure Transducer is 4-20mA current output sensors for monitoring the pressure of natural gas. Measure very low inlet and output pressure or very high natural gas bottle pressures. Where there is the potential for natural gas to be present in the local atmosphere, special approval options such as ATEX intrinsic safety are available.
Natural gas pipelines are pipelines that transport natural gas (including associated gas produced in oil fields) from mining sites or treatment plants to urban gas distribution centers or industrial enterprise users, also known as gas pipelines. Using natural gas pipelines to transport natural gas is the only way to transport large amounts of natural gas on land. Natural gas pipelines account for about half of the total pipeline length in the world.
Residential gas inlet pipes should be installed in non-residential rooms such as kitchens, corridors, and enclosed balconies connected to the kitchen (the balconies should be closed when transporting wet gas in cold areas) and other non-residential rooms that are convenient for maintenance. When it is really difficult, it can be introduced from the stairwell, but metal pipes and inlet pipe valves should be installed outdoors.
The gas introduction pipes of commercial and industrial enterprises should be installed in the rooms or gas meter rooms where gas is used.
The gas introduction pipe should be introduced through the wall along the ground on the outer wall. The upper bend of the outdoor exposed pipe section should be installed with no less than DN15 cleaning tee and wire plug, and treated with anti-corrosion treatment. Keep warm when transporting wet gas in cold areas. The introduction pipe can be buried into the room through the outer wall or foundation of the building. When the introduction pipe penetrates the wall or foundation and enters the building, it shall exit the indoor ground within a short distance, and shall not be laid horizontally under the indoor ground.
The sensors used to detect natural gas pipelines can be used to detect the pressure of natural gas pipelines with explosion-proof verification and regular gas pipeline pressure sensors and gas pressure Transducers.
The air pressure sensor is used to measure the absolute pressure of the gas. It is mainly suitable for physical experiments related to gas pressure, such as gas laws, etc. It can also measure dry and non-corrosive gas pressure in biological and chemical experiments.
The air pressure sensor is mainly used to measure the pressure of the gas. One of the atmospheric pressure sensors is usually used to measure changes in weather and use the corresponding relationship between air pressure and altitude for altitude measurement.
The air pressure sensor is a detection device that can feel the measured information, and can transform the detected and felt information into electrical signals or other required forms of information output according to a certain rule to meet the needs of information transmission, processing, and Storage, display, recording and control requirements.
Pressure transmitter types include gauge pressure, absolute pressure, and differential pressure. Gauge pressure refers to the pressure that is less than or greater than atmospheric pressure based on the atmosphere. Absolute pressure refers to the absolute zero pressure as the reference and is higher than the absolute pressure. Differential pressure refers to the difference between two pressures.
According to the working principle of the pressure transmitter:
Gas pressure Transducer is mainly used to measure the absolute pressure of gas conversion device. It can be used for pressure measurement of blood pressure, wind pressure, pipeline gas, etc. Its performance is stable and reliable, and it is mainly suitable for physical experiments related to gas pressure, such as gas laws. It can also measure the pressure of dry, non-corrosive gases in biological and chemical experiments.
The Gauge Pressure Transmitter SMT3151 TGP, has been specially designed for the process industry, and measures vacuum, gauge and absolute pressure ranges of gases, steam, fluids, and dust up to 600 bar.
Flush diaphragm pressure sensor has Flush membrane / diaphragm structure, anti-blocking design. Pressure measurement of viscous media.
Flush diaphragm pressure sensor uses a diaphragm isolation process. Feel the pressure directly with a flat membrane. There is no pressure hole in the test head. There is no clogging of viscous media during the measurement.
Cryogenic pressure transducer for low temperature pressure measurement. -196℃～+125℃、-260℃/-350c（especial）. Sino-Inst offers a variety of Pressure Sensors…
In the chemical production, the medium often encounters problems such as impurities, crystal particles or agglomeration…
Q&A
What is pressure transducer used for?
The main function of a pressure transmitter is to transmit pressure signals to electronic equipment. The pressure is then displayed on the computer. For example, the mechanical signal of water pressure is converted into an electronic signal such as voltage or current (usually 0-5V or 4-20mA). Pressure and voltage or current have a linear relationship. It is generally proportional, so the voltage or current output by the transmitter increases with increasing pressure. A pressure transmitter is a sensor commonly used in industrial practice. It is widely used in various industrial automatic control environments. Involving water conservancy and hydropower, railway transportation, intelligent buildings, production control, aerospace, military industry, petrochemicals, oil wells, electric power, ships, machine tools, pipelines and many other industries. The pressure transmitter workshop must be in direct contact with the measured medium. Often run in high temperature, low temperature, corrosion, vibration, shock and other environments. Whether it works normally on the job site depends not only on the quality of the product. It also depends on optimized engineering design and reasonable model configuration. And proper installation and maintenance. Pressure transmitters are a key element in the fluid industry. Pressure transmitters are mainly used in the following areas: 1.Petroleum, petrochemical, chemical industry, supporting with throttling devices. Provides accurate flow measurement and control. Measures pressure and level in pipes and tanks. 2.Electric power, city gas, and other companies. Places requiring high stability and high accuracy measurement. 3.Pulp and papermaking are used in places that require chemical-resistant liquids and corrosion-resistant liquids. 4. Steel, non-ferrous metals, ceramics, used in furnace pressure measurement and other places requiring high stability, high precision measurement and other places. It is used in places where stable measurement is required under strict control (temperature, humidity, etc.). 5. Machinery and shipbuilding, used to strictly control the place where high precision is required for stable measurement. In general, the pressure transmitter is mainly used to measure the pressure of the medium and the liquid level.
Wu Peng, born in 1980, is a highly respected and accomplished male engineer with extensive experience in the field of automation. With over 20 years of industry experience, Wu has made significant contributions to both academia and engineering projects.
Throughout his career, Wu Peng has participated in numerous national and international engineering projects. Some of his most notable projects include the development of an intelligent control system for oil refineries, the design of a cutting-edge distributed control system for petrochemical plants, and the optimization of control algorithms for natural gas pipelines.
Flush diaphragm pressure sensor is also called flush diaphragm pressure transducer or flush diaphragm pressure transmitter. Flush diaphragm pressure sensor has Flush membrane / diaphragm structure, anti-blocking design. Pressure measurement of viscous media.
Flush diaphragm pressure sensor uses a diaphragm isolation process. Feel the pressure directly with a flat membrane. There is no pressure hole in the test head. There is no clogging of viscous media during the measurement. Adopting flush membrane structure, diffused silicon pressure-sensitive core body, with good moisture resistance and excellent media compatibility. The sensor interface is available in clamp, thread and flange options. The output signal can be selected from voltage, current, and so on. The flush diaphragm of the sensor prevents problems such as scaling, unsanitary and clogging of viscous liquids.
Sino-Inst offers a variety of Flush diaphragm pressure sensors for industrial pressure measurement. If you have any questions, please contact our sales engineers.
This type of pressure sensor is also commonly known as: Flat film pressure sensor. Diaphragm pressure transmitter. Paint pressure sensor. Food pressure sensor. Diaphragm pressure sensor. Diaphragm pressure transmitter. Or sanitary pressure transmitter.
Flush diaphragm pressure sensor, including strain type and diffused silicon front type.
The strain-type flush-membrane measuring end adopts a special, sturdy flush diaphragm. Hard particles in the measured medium will not damage the isolating diaphragm. Compact structure, corrosion resistance, anti-vibration, anti-particle impact, wide temperature compensation.
Diffusion silicon front type is made of imported diffusion silicon core. Use calibration and digital compensation technology. The product has reliable performance and stable output.
Features of SI-703 Flush diaphragm pressure sensor
The imported resistance strain gauge is used as a pressure-sensitive chip. The anti-blocking design of the flush membrane / diaphragm structure can measure viscous media.
Advanced patch technology and process;
It can bear large impact pressure, and the bearing pressure can reach 100MPa;
The temperature drift is small, and it can work stably at the working temperature of -20 ~ 85 ℃ for a long time;
The elastomer is also connected to the joint using a fully sealed or integrated structure. Solve the oil / gas shortcomings of diffused silicon and ceramic core pressure sensor cores. Reliable work and high fatigue strength;
The sensor’s Flush diaphragm structure prevents problems such as scaling, unsanitation, and sticky liquid clogging. Widely used in food, pharmaceutical, brewing and other process control fields. It is suitable for the pressure measurement and control of viscous media such as chemical coatings, paints, muds, asphalts, and crude oil under weak pressure. Its industry applications are as follows:
Food hygiene industry;
Paper industry;
Sewage level measurement;
Beverage tank liquid level measurement;
Pipeline level measurement;
Pharmaceutical and biological products processing.
Flush diaphragms appear flush from the surface, so they are called flush diaphragms.
A flush diaphragm is a diaphragm that is fully open and exposed to the pressure medium. The flush diaphragm is level or slightly recessed with the surrounding surface when installed.
The purpose of the flush membrane is to prevent the viscous medium from blocking the pressure hole, or to use a special material for better measurement with the medium to avoid damage to the sensor chip material, etc.
In short, the way to measure or protect the sensor according to the specific application
Flush pressure sensor refers specifically to Pressure Sensors with Flush Diaphragms. Pressure transmitters and transducers with open flush diaphragms suitable for use with highly viscous media such as plastics, paper pulp, bitumen, sewage, paint and adhesives.
Internal diaphragm is the industry standard for most gaseous and liquid media because it is inexpensive and easy to handle.
However, once it encounters the measurement of viscous media, or in the case of high hygiene requirements. Keeping the Flushing connection can effectively avoid blockage. And meet the sanitary cleaning requirements.
Flush Mount Diaphragm can be: Clamp flat film installation, threaded flat film installation, or flange flat film installation. Sometimes there are customers who need special cavityless flat membranes.
Clamp Flush Membrane Pressure Sensor
The clamp type adopts a silicone oil filling technology, and the pressure felt by the diaphragm is transmitted to the pressure chip through the silicone oil. The compensation circuit corrects the pressure signal to a linear electrical signal.
The stressed diaphragm on the end face of the clamp is exposed to directly feel the pressure. Prevents scaling, unsanitary and sticky pressure clogging problems. It is widely used in hygiene industries such as food, medicine, brewing and other occasions where the measuring medium may be fouled.
Threaded flush membrane pressure sensor
The threaded flush Diaphragm pressure transmitter uses a flat membrane to directly sense the pressure signal. The diffusion silicon pressure core is used as the sensitive element. The standard silicone oil or olive oil is used as the pressure transmission medium.
The measuring end is made of 316L stainless steel, and the flush isolation diaphragm is specially welded. Compact structure, corrosion resistance, vibration resistance, wide temperature compensation.
Flange flush Diaphragm pressure transmitter
Shell optional;
flange mounting;
Two-wire system, 4～20mA analog output, HART® protocol digital communication;
Smart LCD head with backlight;
Large-size diaphragm, fully welded and sealed, long-term reliability and durability;
For pressure measurement of gas, liquid, steam;
Anti-corrosion diaphragm is optional (tantalum, Kazakhstan C, 316L, 316L sprayed with PTFE);
Especially suitable for high temperature viscous liquid;
Cavityless flush Diaphragm pressure transmitter
Cavityless flush Diaphragm pressure transmitter
The cavityless flush Diaphragm pressure transmitter adopts a high-precision foil strain gauge and has no cavity to measure the diaphragm. It is especially suitable for measuring liquids with high viscosity.
The product adopts an improved and optimized installation structure, which makes the product have good anti-vibration ability.
Equipped with a variety of characteristic amplifying circuits, such as anti-interference, high temperature resistance, intrinsically safe explosion-proof, etc., making the modification suitable for various measurement and control occasions such as oil fields and food.
Working Principle
Flush diaphragm pressure sensors use processes such as diffusion or ion implantation to form resistors and connect them to a Wheatstone bridge. Micro-machining technology is used to form a pressure-sensitive diaphragm under the bridge. When pressure is applied to the diaphragm, the resistance value changes and a linearized output signal is generated that is proportional to the applied pressure. When we add DC power to the Wheatstone bridge, a DC voltage signal will be output. After the second conversion line, the two-wire system 4 ~ 20MA output is realized.
When to Use a Flush Diaphragm Pressure Connection？
In short, there are two cases, we can first consider Flush Diaphragm Pressure Connection.
The first is hygienic applications. Such as Pharmaceutical, Food, Beverage & Biotech.
For these applications the concern is not necessarily high viscosity but more to do with cleanliness. The wetted part of the Flush Diaphragm Pressure Sensor is flat. No holes, no ripples. This way, residue-free cleaning is easy.
The media may be too hard to adequately fill the internal voids of the pressure connector. Or once the process cools, the substance may wax. For these types of substances, it is necessary to specify a flushing connection in which the diaphragm is fully open.
Some pressure transducers have the option of flush-embedded diaphragms where mechanical damage to the diaphragm is a concern.
WIKA has a great video on When to use a front-flush pressure connection? Let’s take a look.
High Temperature Pressure Transducer is also called High Temperature Pressure Sensor, or High Temperature Pressure Transmitter. The High Temperature Pressure Transducer is used for applications where the medium temperature exceeds the temperature limits of standard pressure transmitters. By assembling Cooling … Continue reading →
What Is Static Water Pressure? Definition of Static Water Pressure: Static Water Pressure refers to the pressure on water when it is stationary or moving in a straight line at a constant speed. Static Water Pressure is also called hydrostatic … Continue reading →
What is a ceramic pressure sensor? Ceramic pressure sensors are sensor diaphragms made of ceramic alumina (Al2O3). Ceramic is a material with high elasticity, corrosion resistance, wear resistance, impact, and vibration resistance. Ceramic has good thermal stability characteristics. High-temperature sintering … Continue reading →
The Hydrostatic Pressure Transmitter measures the hydrostatic pressure exerted by a hydrostatic head. Use these hydrostatic pressure transmitters to measure the liquid level in storage tanks, processing vessels, collection tanks, pump inlet heads. And other applications use hydrostatic pressure to … Continue reading →
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4-20mA to 0-10v voltage, this is I/V conversion. That is current-voltage conversion, usually used for long-distance signal transmission in the industry. How to convert a 4-20mA to 0-10V /1-5V signal? There are two methods: one is to do it yourself … Continue reading →
What is a PID controller? A PID controller is an instrument used in industrial control applications to regulate temperature, flow, pressure, speed, and other process variables. PID is the abbreviation for proportional integral derivative. PID controllers use a control loop … Continue reading →
What does SCADA stand for? SCADA is the abbreviation of Supervisory Control And Data Acquisition. Namely data acquisition and monitoring control system. SCADA system is also called monitoring configuration software, which is widely used in enterprise equipment management of equipment … Continue reading →
What is a pressure sensor? A pressure sensor is a device that senses a pressure signal and converts the pressure signal into a usable output electrical signal according to certain rules. Pressure sensors have a variety of structural types. Common … Continue reading →
You may have heard of Static Pressure, Dynamic Pressure and Total Pressure. Especially in some industrial process pipe parameters. So what are Static Pressure, Dynamic Pressure and Total Pressure? What is the difference between them? How are they measured? Let’s … Continue reading →
What is a piezoelectric pressure sensor? The piezoelectric pressure sensor is a sensor that uses the piezoelectric effect of piezoelectric materials to convert the measured pressure into an electrical signal. Use electrical components and other machinery to convert the pressure … Continue reading →
An Air pressure transducer is a sensor that converts the mechanical signal of air pressure into a current signal. Pressure has a linear relationship with voltage or current, and it is generally proportional. Therefore, the output voltage or current of … Continue reading →
Steam pressure transmitters are widely used in the measurement and control of various high-temperature steam piping systems. The monitoring of steam pipes is very important. To measure the pressure of steam pipes, have you encountered the following problems: Steam pressure … Continue reading →
Cryogenic pressure transducer for low temperature pressure measurement. -196℃～+125℃、-260℃/-350c（especial）. Sino-Inst offers a variety of Pressure Sensors for pressure measure and control. If you have any questions, please contact our sales engineers. What is Cryogenic pressure transducer? The Cryogenic pressure sensor … Continue reading →
Intrinsically safe vs explosion proof is a common function of pressure transmitters. When pressure transmitters need to be used in high-risk and explosive places, you must know it! Sino-Inst offers a variety of explosion-proof pressure transmitters. If you have any … Continue reading →
In short, a pressure sensor converts pressure into a small electrical signal, which is sent and displayed. Therefore, these are also commonly referred to as pressure transmitters. Two common signals used are 4 to 20 mA signals and 0 to 5 volt signals.
Most pressure sensors work using the piezoelectric effect. This is when the material generates a charge in response to stress. This stress is usually compressive, but may be twisted, bent, or vibrated.
Pressure sensors detect pressure and can determine the amount of pressure by measuring the charge.
The pressure sensor needs to be calibrated in order to know what voltage or milliamp (mA) signal corresponds to what pressure. This is the basic “zero” and “span” calibration or minimum and maximum, which is a common job for maintenance personnel.
Pressure gauge according to its measurement accuracy:
Can be divided into precision pressure gauges, general pressure gauges. The precision level of precision pressure gauges is 0.1, 0.16, 0.25, 0.4 and 0.05. The accuracy levels of general pressure gauges are 1.0, 1.6, 2.5, and 4.0.
Pressure gauge according to its measurement basis:
Pressure gauges are divided into: general pressure gauges, absolute pressure gauges, stainless steel pressure gauges, and differential pressure gauges according to the basis of their indicated pressure. General pressure gauges are based on atmospheric pressure. The absolute pressure gauge is based on the absolute zero pressure. The differential pressure gauge measures the difference between two measured pressures.
Pressure gauge according to its measuring range:
Divided into vacuum gauges, pressure vacuum gauges, micro pressure gauges, low pressure gauges, medium pressure gauges and high pressure gauges.
Vacuum gauges are used to measure pressure values below atmospheric pressure.
Pressure vacuum gauges are used to measure pressure values less than and above atmospheric pressure.
Micro pressure gauges are used to measure pressure values less than 60,000 Pa.
Low pressure meter is used to measure 0 ~ 6MPa pressure value.
Medium pressure gauge is used to measure the pressure value of 10 ~ 60MPa.
High pressure gauge is used to measure pressure value above 100MPa.
Pressure gauge according to its display mode: Divided into pointer pressure gauge. Digital pressure gauge.
The pressure gauge is divided according to its use function: Pressure gauges can be divided into local indication pressure gauges and charged signal control pressure gauges according to their different functions.
General pressure gauges, vacuum pressure gauges, shock-resistant pressure gauges, stainless steel pressure gauges, etc. are all in-situ indicating pressure gauges. They have no other control functions except the indicated pressure.
The output signals of the pressure signal-controlled pressure gauge mainly include:
1. Switching signal (such as electric contact pressure gauge) 2. Resistance signal (such as resistance remote pressure gauge) 3. Current signals (such as inductive pressure transmitters, remote pressure gauges, pressure transmitters, etc.)
According to the purpose of the pressure gauge:
It can be divided into: ordinary pressure gauge, ammonia pressure gauge, oxygen pressure gauge, electric contact pressure gauge, remote transmission pressure gauge, vibration resistance pressure gauge, pressure gauge with inspection pointer, double needle double tube or double needle single tube pressure gauge, digital display Pressure gauges. Digital precision pressure gauges.
Pressure sensors are mainly divided into two types: semiconductor piezoresistive type and electrostatic capacity type. Below we introduce their principles.
Semiconductor piezoresistance type: The semiconductor piezoelectric impedance diffusion pressure sensor forms a semiconductor deformation pressure on the surface of the sheet. The sheet is deformed by an external force (pressure) to produce a piezoelectric impedance effect. The change in impedance is converted into an electrical signal.
Capacitance type: The electrostatic capacitance type pressure sensor is a capacitor that opposes the fixed pole of glass and the movable pole of silicon to form a capacitance. It converts the change in electrostatic capacity generated by deforming the movable pole by external force (pressure) into an electrical signal.
A pressure sensor (Pressure Transducer) is a device or device that can sense the pressure signal and convert the pressure signal into a usable output electrical signal according to a certain rule.
At present, there are many types of core materials for pressure sensors. The performance of several core materials is briefly introduced below. 1. Single crystal silicon 2. Polysilicon 3. Silicon-Sapphire 4. Compound semiconductor materials 5. SiC thin film material
A diaphragm pressure gauge is a device,
that uses a diaphragm with a known pressure to measure pressure in a fluid.
It has many different uses, such as monitoring the pressure of a canister of gas, measuring atmospheric pressure. Or recording the strength of the vacuum in a vacuum pump.
The diaphragm pressure gauge consists of a circular membrane, made from sheet metal of precise dimensions, which can either be flat or corrugated.
The diaphragm is mechanically connected to the transmission mechanism, which will amplify the small deflections of the diaphragm, and transfer them to the pointer.
Sino-Inst offersFlush diaphragm pressure sensors. A wide variety of Flush diaphragmPressure sensors options are available to you. Such as free samples, paid samples. Sino-Instrument is a globally recognized manufacturer ofFlush diaphragm Pressure sensors, located in China.
Sino-Inst sells through a mature distribution network that reaches all 30 countries worldwide. Flush diaphragmPressure sensors products are most popular in Europe, Southeast Asia, and Mid East. You can ensure product safety by selecting from certified suppliers. With ISO9001, ISO14001 certification.
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Wu Peng, born in 1980, is a highly respected and accomplished male engineer with extensive experience in the field of automation. With over 20 years of industry experience, Wu has made significant contributions to both academia and engineering projects.
Throughout his career, Wu Peng has participated in numerous national and international engineering projects. Some of his most notable projects include the development of an intelligent control system for oil refineries, the design of a cutting-edge distributed control system for petrochemical plants, and the optimization of control algorithms for natural gas pipelines.
