In simple terms, hydrostatic pressure refers to the pressure created by the weight of a liquid resting above a specific point. When a liquid is not in motion, the pressure it exerts at any given point is directly related to the height of the liquid column above that point, assuming the liquid has a uniform density.
The hydrostatic properties of a liquid can vary based on several factors, with the density of the liquid and local gravity being the most important. To accurately determine the hydrostatic pressure of a particular liquid, it is essential to know both of these quantities.
Fluid storage and transportation: Accurate hydrostatic pressure measurement is crucial for monitoring tank levels and managing liquid flow through pipelines. Helping to prevent overflows, leaks, and other issues.
Marine engineering: Hydrostatic pressure is vital for designing and maintaining the stability of ships, submarines, and other aquatic vessels. As it influences buoyancy, ballasting, and structural design.
Civil engineering: Projects such as dam and reservoir design require a deep understanding of hydrostatic pressure. To ensure structures can withstand the force exerted by the water they contain. It is also essential for groundwater monitoring and the construction of tunnels and underground structures.
Environmental monitoring and remediation: Hydrostatic pressure measurements are useful in flood forecasting, water resource management, and contaminant migration analysis in groundwater. Allowing for informed decision-making and effective remediation strategies.
In short, hydrostatic pressure is a fundamental concept with far-reaching implications in various industries.
Its proper understanding and application are essential for maintaining efficiency, safety, and reliability in numerous industrial processes and systems.
SMT3151TR Submersible Level Transmitter Hydrostatic level transmitter is also called hydrostatic level gauge. The rod-type Hydrostatic level transmitter 4-20mADC standard signal output. Flange or threaded installation. Can withstand high temperatures up to 450 ℃.
Pressure Guided Submersible Level Transmitter Stainless Steel Level Sensor-Pressure Guided Submersible Level Transmitter. The sensor part and the signal processing circuit are inside the junction box. It is used for high temperature, corrosive liquid, sewage, etc.
SI-302 Anti-corrosive Submersible Level Transmitter Submersible Level Transmitter is made of Anti-corrosive all-tetrafluoroethylene(PTFE) material. It has high temperature resistance, corrosion resistance and anti-clogging.
Electronic pressure sensors are advanced devices that convert pressure into electrical signals, allowing for precise and accurate measurements.
These sensors are widely used in various industrial applications due to their versatility, reliability, and ease of integration with digital systems.
Two common types of electronic pressure sensors are piezoresistive sensors and capacitive sensors.
Piezoresistive Sensors
Piezoresistive sensors are based on the piezoresistive effect, where a material’s electrical resistance changes when subjected to mechanical stress, such as pressure. These sensors typically consist of a diaphragm and a Wheatstone bridge arrangement with piezoresistive elements.
When pressure is applied, the diaphragm deforms, causing the piezoresistive elements to change their resistance. This change in resistance is converted into an electrical signal, which can be measured and calibrated to represent the applied pressure.
Piezoresistive sensors are popular for their high sensitivity, accuracy, and relatively low cost. They can be used for a wide range of pressure measurements, including absolute, gauge, and differential pressure.
Capacitive Sensors
Capacitive sensors measure pressure by detecting changes in capacitance between two conductive plates, separated by a dielectric material. One of the plates is typically a flexible diaphragm that deforms under pressure, causing the distance between the plates to change. This change in distance alters the capacitance, which can be measured and calibrated to represent the applied pressure.
Capacitive sensors are known for their high accuracy, excellent long-term stability, and low temperature sensitivity. They are suitable for various applications, including low-pressure measurements and corrosive or high-temperature environments. However, capacitive sensors can be more expensive and susceptible to electromagnetic interference compared to piezoresistive sensors.
Pressure gauges are devices used to measure fluid pressure in various applications. They display pressure readings on a dial or scale.
There are two common types: Bourdon tube gauges and diaphragm and capsule gauges.
Bourdon Tube
Bourdon tube gauges use a curved, flattened tube connected to the pressure source. As pressure increases, the tube straightens, moving a pointer along a scale to show the pressure level.
These gauges are popular for their simplicity, durability, and affordability. They can measure a wide range of pressures and are used in industrial processes, hydraulic systems, and pressure testing equipment.
Diaphragm and Capsule
Diaphragm and capsule gauges use flexible membranes that deform under pressure. In diaphragm gauges, a single diaphragm moves due to pressure, and this movement is transferred to a pointer, indicating the pressure level on a scale.
Capsule gauges have two diaphragms welded together, forming a sealed capsule that expands or contracts under pressure. The capsule’s movement is also translated into a pressure reading via a pointer.
These gauges are suitable for low-pressure measurements and can be used with corrosive or viscous fluids. They are commonly found in gas distribution systems, chemical processing, and HVAC systems.
Manometers are simple devices used to measure fluid pressure by comparing it to a reference pressure, often atmospheric pressure. There are two common types: U-tube manometers and inclined tube manometers.
U-tube Manometer
U-tube manometers consist of a U-shaped tube filled with liquid. Pressure is applied to one side, and the difference in liquid levels indicates the pressure. They are widely used for their simplicity and accuracy.
Inclined Tube Manometer
Inclined tube manometers have a tube inclined at an angle, improving sensitivity and resolution. Like U-tube manometers, they measure pressure by comparing liquid levels in the tube when pressure is applied.
Tools for converting and calculating pressure values
Hydrostatic pressure is essential in various industries, with numerous applications ranging from fluid storage to marine engineering and civil construction.
1. Tank Level Measurement
Measuring hydrostatic pressure at the bottom of a tank helps determine the liquid level inside. This information is crucial for inventory control, safety, and efficient operations. It ensures that tanks do not overflow, leak, or experience other issues. In addition to water storage tanks, it can also be used to measure the liquid level of diesel tanks.
2. Pipeline Monitoring
Hydrostatic pressure measurements are used to monitor pipelines that transport fluids like oil, gas, and water. Accurate pressure data helps prevent leaks, maintain flow rates, and detect potential issues in the pipeline system.
3. Ship Stability and Ballasting
Understanding hydrostatic pressure is vital for maintaining the stability of ships and other marine vessels. Engineers use hydrostatic pressure data to design ballast systems and ensure that ships remain stable and balanced, even under changing load conditions.
4. Submersible Vehicle Design
Hydrostatic pressure plays a key role in designing submersible vehicles, like submarines and remotely operated underwater vehicles (ROVs). Engineers must consider the pressure exerted by water at various depths to create vehicles that can withstand the harsh underwater environment.
5. Dam and Reservoir Design
In civil engineering, hydrostatic pressure is crucial for designing dams and reservoirs. These structures must be strong enough to withstand the force exerted by the water they contain. A thorough understanding of hydrostatic pressure is necessary to ensure the safety and longevity of dams and reservoirs.
6. Groundwater Monitoring
Hydrostatic pressure measurements are used to monitor groundwater levels, which is important for water resource management and environmental protection. Accurate data on groundwater pressure can help detect potential contamination, assess water availability, and inform decisions on water usage and conservation.
In summary, hydrostatic pressure has a wide range of applications across various industries, playing a critical role in ensuring efficiency, safety, and reliability in numerous industrial processes and systems.
Hydrostatic pressure refers to the force per unit area exerted by a fluid at rest, resulting from the weight of the fluid column above the measurement point.
Examples of hydrostatic pressure include the pressure felt while swimming underwater, the pressure experienced by a dam due to the water it holds, or the pressure at the bottom of a water storage tank.
Hydrostatic pressure is important because it influences various industrial applications, such as fluid storage and transportation, marine engineering, civil engineering, and environmental monitoring. Understanding and managing hydrostatic pressure helps ensure safety, efficiency, and reliability in these processes.
Hydrostatic pressure underwater is the pressure experienced at a specific depth within a body of water. It increases with depth, as the weight of the water column above the measurement point increases, and it depends on the water’s density and local gravity.
Temperature affects hydrostatic pressure measurements because it can cause changes in fluid density and the volume of the container or vessel. These changes can lead to variations in the pressure readings. Accurate measurements require compensating for temperature fluctuations or using temperature-resistant devices.
To convert hydrostatic pressure to fluid height, use the formula: Height = Pressure / (Density × Gravity). This equation assumes the fluid has a uniform density, and you have values for the fluid’s density and local gravity.
Hydrostatic pressure is the pressure exerted by a fluid at rest due to its weight, acting at a certain point within the fluid. Total pressure is the sum of hydrostatic pressure and dynamic pressure, which is the pressure caused by fluid motion. In other words, total pressure accounts for both the weight of the fluid and its movement.
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In conclusion, hydrostatic pressure plays a vital role in numerous industrial applications, and understanding its measurement and implications is essential for safety, efficiency, and reliability. As a leading provider of measurement solutions, Sino-Inst offers a wide range of professional hydrostatic pressure measurement transmitters to meet your specific needs.
Whether you’re involved in fluid storage, transportation, marine engineering, civil engineering, or environmental monitoring, Our Sino-Inst’s expertise and advanced products can help you achieve accurate and reliable hydrostatic pressure measurements. Don’t hesitate to contact us for more information or assistance in selecting the right solution for your application. Trust Sino-Inst to be your partner in achieving success with hydrostatic pressure management.
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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.
Welcome to our comprehensive guide on understanding Class 1 Div 1 and Class 1 Div 2 hazardous location classifications. In many industries, dealing with hazardous environments is an essential aspect of ensuring workplace safety. Proper classification of these locations is crucial to mitigate risks and prevent accidents.
In this guide, we will delve into the differences between these two classifications, their significance, and protection methods used to ensure the safety of both employees and equipment. Our goal is to provide you with a clear understanding of these essential safety measures and their role in various industries.
Definition and Characteristics of Class 1 Locations
Class 1 hazardous locations are areas where flammable gases, vapors, or liquids exist or have the potential to exist under normal operating conditions. These substances pose a risk of explosion or fire if they come into contact with an ignition source, such as a spark or high temperature.
The primary factor that defines a Class 1 location is the presence of flammable materials in the atmosphere. Which can be further divided into Divisions and Groups based on the likelihood and nature of the hazardous substances.
Common Examples of Class 1 Environments
A wide range of industries and applications may involve Class 1 hazardous locations. Some common examples include:
Oil and Gas Industry: Oil refineries, drilling platforms, and processing plants often involve the production, storage, and handling of flammable gases and liquids.
Chemical and Petrochemical Industry: Facilities that produce, store, or handle flammable chemicals or solvents can create hazardous environments due to the presence of flammable vapors.
Pharmaceutical Industry: The manufacturing and processing of pharmaceuticals may involve the use of flammable solvents or chemicals, creating potential Class 1 locations.
Fuel Storage and Distribution: Facilities for storing and distributing fuels such as gasoline, diesel, or aviation fuel are likely to have Class 1 locations due to the flammability of these substances.
Paint Manufacturing and Application: The production and application of paints and coatings may involve flammable solvents or vapors, which can create hazardous environments.
Wastewater Treatment Plants: The presence of methane gas produced during the decomposition of organic matter can result in Class 1 locations in certain areas of wastewater treatment plants.
It is important to note that not all areas within these industries or facilities are classified as Class 1 hazardous locations. The specific classification depends on factors such as the type and concentration of flammable substances and the likelihood of their presence under normal operating conditions.
Definition and Criteria for Class 1 Div 1 Classification
Class 1 Division 1 (Class 1 Div 1) locations are hazardous areas where flammable gases, vapors, or liquids are present or likely to be present continuously, intermittently, or periodically during normal operations.
The key factor differentiating Class 1 Div 1 from Class 1 Div 2 locations is the higher probability of hazardous substances being present, which results in a greater risk of explosion or fire. In these environments, special safety measures and equipment are required to prevent accidents and protect workers.
Definition and criteria for Class 1 Div 2 classification
Class 1 Division 2 (Class 1 Div 2) locations are hazardous areas where flammable gases, vapors, or liquids are not typically present during normal operations. But may exist under abnormal conditions, such as equipment failures, leaks, or process upsets.
The main difference between Class 1 Div 1 and Class 1 Div 2 locations is the lower likelihood of flammable substances being present in Class 1 Div 2 environments. Despite the lower risk, safety precautions and specialized equipment are still necessary to prevent accidents and protect workers in these areas.
Class 1 Div 2 locations can also be areas adjacent to Class 1 Div 1 locations where flammable substances might escape due to a failure in a containment system or during maintenance activities. In these cases, the hazardous materials are not expected to be present in concentrations that pose a risk of ignition under normal operating conditions, but the potential for their presence still warrants the classification as Class 1 Div 2.
Difference Between Class 1 Div 1 and Class 1 Div 2
The primary difference between Class 1 Div 1 and Class 1 Div 2 locations lies in the risk levels associated with the presence of flammable substances.
Class 1 Div 1 locations have a higher likelihood of flammable gases, vapors, or liquids being present during normal operations, resulting in a greater risk of explosion or fire.
In contrast, Class 1 Div 2 locations are areas where flammable substances are not typically present during normal operations but may exist under abnormal conditions, such as equipment failures or leaks.
The definitive reference is the National Electrical Code Chapter 5.
Due to the differences in risk levels, the protection methods employed in Class 1 Div 1 and Class 1 Div 2 locations also vary.
Some common distinctions in protection methods include:
Explosion-proof enclosures: Used in Class 1 Div 1 locations, these enclosures are designed to withstand an internal explosion and prevent the ignition of flammable substances in the surrounding atmosphere. In Class 1 Div 2 locations, explosion-proof enclosures are not always necessary, as the risk of explosion is lower.
Intrinsic safety: Intrinsic safety measures, such as limiting electrical energy to levels below the ignition threshold, are more commonly applied in Class 1 Div 1 locations due to the higher risk. While these measures can also be used in Class 1 Div 2 locations, other protection methods. Such as non-incendive equipment, may be more appropriate.
Non-incendive equipment: Used primarily in Class 1 Div 2 locations, non-incendive equipment is designed to prevent sparks or high temperatures that could ignite flammable substances under normal operating conditions. This equipment may not be suitable for Class 1 Div 1 locations due to the higher risk levels.
explosion proof enclosure
You also need to consider explosion-proof requirements when purchasing instruments. For example, our pressure transmitters, flow meters, level meters, etc. all have explosion-proof standards. Explosion-proof products will also be equipped with explosion-proof casings. The explosion-proof instrument housings provided by Sino-Inst generally have the “EX” explosion-proof mark.
Explosion-proof enclosures should obtain appropriate certifications, such as ATEX (Europe), IECEx (International), NEC/CEC (North America), to ensure that they can be used safely in specific hazardous environments.
Explosion-proof shells usually adopt one of the following explosion-proof principles:
Explosionproof type (Ex d): Able to withstand the pressure of internal explosions and prevent internal explosions from igniting gases in the external environment.
Increased safety type (Ex e): non-spark design, its structure ensures sufficient safety increment to prevent ignition of surrounding explosive gases.
Intrinsically safe (Ex i): Ensures that any electrical equipment in the circuit will not produce sparks or thermal effects sufficient to ignite surrounding gases.
Positive pressure type (Ex p): By maintaining the pressure inside the casing higher than the surrounding environment, it prevents harmful gases from entering the inside of the casing.
Non-ignition type (Ex n): Designed to ensure that it will not ignite surrounding explosive mixtures under normal operating conditions.
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This guide explores the differences between Class 1 Div 1 and Class 1 Div 2 hazardous location classifications. Class 1 Div 1 locations have a higher likelihood of flammable substances being present during normal operations, while Class 1 Div 2 locations pose a with lower risk, Substances potentially present only under abnormal conditions.
The protection methods used in these locations differ accordingly, with Class 1 Div 1 requiring more stringent safety measures.
To determine the appropriate classification, factors such as the type and concentration of flammable substances, frequency and duration of exposure, and potential for abnormal conditions must be considered.
If you choose pressure, liquid level, flow and other measuring instruments for use in hazardous locations, please inform us in advance. We can configure explosion-proof products for you.
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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.
0-10V pressure transducers with their 3 or 4 wire configurations, work tirelessly to monitor and control water pressure gauges, air pressure, vacuum pressure, and more.
Whether it’s a 10 bar absolute pressure or delicate differential pressure, these transducers can handle it all. As they convert psi into a voltage output signal, they bridge the gap between the tangible world and the realm of digital communication.
A 0-10V signal output is a method of electrical communication that utilizes voltage levels ranging from 0 volts to 10 volts to represent specific values within a given measurement scale. This standardized analog communication allows devices to convey information through varying voltage signals, facilitating seamless data exchange and interpretation in various applications.
0-10V pressure transducers are devices that measure pressure changes in various environments, such as water, air, or vacuum. These transducers convert the pressure variations they detect into a 0-10V analog signal output, which corresponds to the measured pressure values. This standardized output allows for easy integration and communication with other devices, making 0-10V pressure transducers valuable tools in a wide range of applications.
Use this comprehensive checklist to define your 0-10V output signal pressure transducer requirements, ensuring that you select the perfect device for your needs:
Pressure Range: What is the minimum and maximum pressure you need to measure?
Output Signal: Confirm that the desired output signal is 0-10 volts.
Accuracy: What level of precision do you require from the transducer?
Electrical Connection: Which type of electrical connection suits your application? (e.g., cable, connector, terminal block)
Process Media Type: What type of media will the transducer be exposed to? (e.g., air, water, gas, or corrosive substances)
Temperature Range: What are the minimum and maximum temperatures that the transducer must be able to withstand and operate effectively in?
By carefully considering each aspect of this checklist, you’ll be well-equipped to select the ideal 0-10V pressure transducer for your specific application.
To zero a pressure transducer, follow these steps:
Disconnect the transducer from any pressure source.
Power the transducer and wait for it to stabilize.
Observe the output signal (usually voltage or current) while it’s at atmospheric pressure.
Adjust the zero-offset setting on the transducer, or in the connected system, until the output signal corresponds to zero pressure.
A pressure-to-voltage transducer, such as a 0-10V pressure transducer, is designed to convert pressure measurements into a proportional voltage output signal. These transducers utilize various sensing technologies, like piezoresistive, capacitive, or strain gauge elements, to detect pressure changes and generate corresponding voltage signals.
The terms “pressure sensor” and “pressure transducer” are often used interchangeably, but there can be subtle differences.
A pressure sensor is a general term for any device that detects pressure changes, while a pressure transducer specifically converts those pressure changes into an electrical output signal, such as voltage or current.
A pressure transmitter and a pressure transducer both convert pressure measurements into electrical output signals. The primary difference is that a pressure transmitter typically generates a standardized output signal, such as a 4-20mA current loop, which is less susceptible to electrical noise and allows for longer transmission distances.
A pressure transducer, on the other hand, often generates voltage output signals, such as a 0-10V signal, which may be more susceptible to noise but are more straightforward to integrate with various devices and systems.
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In conclusion, 0-10V pressure transducers have become an indispensable part of modern pressure measurement technology. These remarkable devices, with their ability to convert pressure changes into corresponding voltage signals, have revolutionized the way we monitor and control various applications. Understanding the intricacies of these transducers and their 3 or 4 wire configurations will empower you to make well-informed decisions for your specific needs.
At Sino-Inst, we take immense pride in our role as a professional manufacturer of pressure sensors and pressure transmitters. Our vast experience and commitment to quality have made us a trusted partner in the industry, ensuring that our customers receive reliable and high-performing products. Let us be your guide on this exciting journey towards better pressure measurement and control.
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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.
Absolute Pressure vs Gauge Pressure is a critical distinction to understand in fields like fluid mechanics and various industrial applications. Absolute pressure refers to the measurement against a vacuum or absolute zero pressure, while gauge pressure represents the difference between atmospheric pressure and the pressure being measured.
The easiest way to distinguish between these two pressures is by their zero points: absolute pressure uses absolute zero as its reference, whereas gauge pressure considers atmospheric pressure as its starting point. As atmospheric pressure can vary, gauge pressure measurements may not be precise. In contrast, absolute pressure remains consistent and definitive.
Knowing the relationship between these two pressures, defined by a formula that factors in the reference pressure, is essential. This understanding allows for accurate use of relative pressure sensors, vacuum pressure formulas, and differential pressure measurement techniques in a wide array of practical situations.
Absolute Pressure
What is absolute pressure?
Absolute pressure is the total pressure exerted by a fluid or gas, measured against a complete vacuum or absolute zero pressure. In other words, it is the sum of the gauge pressure and atmospheric pressure. It is denoted with the subscript “abs”: Pabs.
It is an essential parameter in various scientific and engineering applications where the pressure relative to an absolute vacuum is vital. In order to produce an absolute pressure sensor the manufacturer will seal a high vacuum behind the sensing diaphragm. Therefore if you hold open the process pressure connection of an absolute pressure transmitter to the air it will read the actual barometric pressure.
Units of absolute pressure
Absolute pressure is typically measured in units like Pascals (Pa), pounds per square inch absolute (psia), or bars (bar). Other units used include millimeters of mercury (mmHg) and atmospheres (atm). It is crucial to use the appropriate units when working with absolute pressure to ensure accurate measurements and calculations. Read more about: Common Units Of Pressure.
Gauge Pressure
What is gauge pressure?
Gauge pressure is the difference between the pressure of a fluid or gas and the local atmospheric pressure. It is denoted with the subscript “e”: Pe and is calculated as follows: Pe = Pabs – Pamb.
It represents the pressure relative to the ambient environment, which is why it is commonly used in everyday applications.
Gauge pressure can be either positive, when the pressure being measured is higher than atmospheric pressure, or negative, when the pressure is lower than atmospheric pressure (also known as vacuum pressure).
Units of gauge pressure
Gauge pressure is typically measured in units like Pascals (Pa), pounds per square inch gauge (psig), or bars (bar). Other units used include inches of water column (inH2O) and millimeters of mercury (mmHg). It is essential to use the appropriate units when working with gauge pressure to ensure accurate measurements and calculations.
The difference between absolute and gauge pressure
The primary difference between absolute and gauge pressure lies in their reference points. Absolute pressure is measured against a complete vacuum or absolute zero pressure, whereas gauge pressure is measured relative to the local atmospheric pressure.
As a result, absolute pressure represents the total pressure exerted by a fluid or gas, while gauge pressure indicates the pressure difference between the fluid or gas and the surrounding atmosphere.
The significance of atmospheric pressure
Atmospheric pressure plays a crucial role in understanding the difference between absolute and gauge pressure. It is the pressure exerted by the weight of the air above a given point on the Earth’s surface.
Since atmospheric pressure varies with altitude, weather conditions, and temperature, gauge pressure measurements can also vary under different conditions.
Understanding atmospheric pressure is essential for accurately interpreting gauge pressure measurements and converting between absolute and gauge pressure.
Formula for converting between absolute and gauge pressure
To convert between absolute and gauge pressure, you can use the following formula:
This formula illustrates the relationship between the two types of pressure and accounts for the local atmospheric pressure. By using this formula, you can easily convert gauge pressure measurements to absolute pressure and vice versa, enabling better decision-making and accuracy in various applications.
When should you measure absolute and gauge pressure?
Deciding whether to use absolute or gauge pressure measurement depends on the specific application.
Generally, if you need to measure or control a pressure affected by changes in atmospheric pressure. Such as liquid levels in an open tank or the output pressure of an air compressor, a vented gauge pressure instrument is suitable, as it provides readings without the atmospheric pressure component.
On the other hand, if you want to measure pressures unaffected by atmospheric pressure changes, for example, leak testing a completely sealed, non-flexible container, an absolute pressure sensor is appropriate. Using a gauge pressure sensor in this case would result in fluctuating readings due to changes in barometric pressure, even though the container’s actual pressure remains constant.
Absolute Pressure vs Gauge Pressure Measuring Instruments
There is a difference between instruments that measure absolute pressure and gauge pressure. Such as pressure gauges, pressure transmitters. When we purchase pressure and gauge pressure instruments, we must inform the manufacturer whether you are measuring gauge pressure or absolute pressure.
The relation between gauge pressure and absolute pressure is that gauge pressure is measured relative to the local atmospheric pressure, while absolute pressure is measured against a complete vacuum or absolute zero pressure. Absolute pressure is the sum of gauge pressure and atmospheric pressure.
To convert gauge pressure to absolute pressure, use the following formula:
Absolute pressure is usually higher than gauge pressure because it includes atmospheric pressure in addition to the pressure being measured. However, in cases where gauge pressure is negative (i.e., a vacuum or pressure lower than atmospheric pressure), absolute pressure can still be lower than atmospheric pressure.
An example that demonstrates the difference between absolute and gauge pressure is the pressure inside a sealed, non-flexible container.
The absolute pressure inside the container is the total pressure exerted by the gas, while the gauge pressure is the difference between the pressure inside the container and the atmospheric pressure outside. If the container were sealed at sea level with an internal pressure of 2 atmospheres, the gauge pressure would be 1 atmosphere (assuming the atmospheric pressure outside the container is also 1 atmosphere).
Different Types of Pressure have different characteristics. Different pressure transmitters bear different pressure types. Common pressure types include absolute pressure,…
In conclusion, understanding the differences between “Absolute Pressure vs Gauge Pressure” is essential for various industries and applications.
Recognizing when to use absolute or gauge pressure measurements and employing the appropriate measuring instruments ensures accuracy and reliability in your pressure readings. As a professional pressure transmitter supplier with extensive experience, Sino-Inst offers a wide range of pressure transmitters suitable for both absolute and gauge pressure measurements.
Whether you need accurate pressure sensors for vacuum systems, industrial processes, or weather forecasting, Sino-Inst has the expertise and high-quality products to meet your needs.
For more information or assistance, feel free to contact our knowledgeable team, who are ready to help you make the best choice between absolute pressure and gauge pressure instruments. Trust Sino-Inst to provide you with reliable and accurate pressure measurement solutions.
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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.
Understanding common units of pressure is crucial in various fields, such as chemistry, physics, and engineering. Pressure is a fundamental concept that plays a vital role in processes involving gas, vacuum, and fluid systems. With numerous units available, such as Pascal (Pa), millimeters of mercury (mmHg), pound per square inch (psi), and torr, it’s essential to know their conversion relationships.
In this guide, we will explore the most commonly used pressure measurement units and their conversion relationships, making it easier for you to convert values across different applications.
The Pascal (Pa) is the SI (International System of Units) unit for pressure, named after the French mathematician and physicist Blaise Pascal.
One Pascal is defined as the pressure of one newton per square meter (N/m²).
It represents the force applied uniformly over a unit area, making it an essential unit for quantifying pressure in various scientific and engineering applications.
Exploring Non-SI Units of Pressure
Pounds per square inch (PSI) is a non-SI unit of pressure commonly used in the United States and the United Kingdom. It measures the force in pounds (lbs) applied to a square inch of surface area. Originating from the customary system of units, PSI is widely recognized and employed in various industries as a convenient alternative to the Pascal.
The bar is a non-SI unit of pressure, where one bar is equal to 100,000 Pascals or approximately equal to the atmospheric pressure at sea level. The term “bar” comes from the Greek word “baros,” which means weight. A smaller unit derived from the bar is the millibar (mbar), with one bar being equivalent to 1,000 millibars. Millibars are commonly used to represent smaller pressure variations.
An atmosphere (atm) is a non-SI unit of pressure, used to represent the average atmospheric pressure at sea level on Earth. One atmosphere is defined as 101,325 Pascals. The unit was established to provide a convenient and relatable reference point for pressure measurements in various scientific and engineering applications.
Inches of mercury (inHg) and millimeters of mercury (mmHg) are non-SI units of pressure, based on the height of a column of mercury in a barometer.
One inch of mercury is equivalent to the pressure exerted at the base of a column of mercury exactly one inch high at 0°C, whereas one millimeter of mercury corresponds to a mercury column exactly one millimeter high at the same temperature. One inch of mercury equals 25.4 millimeters of mercury, or approximately 3,386.39 Pascals.
These units originated from the use of mercury barometers, invented by Italian scientist Evangelista Torricelli in the 17th century, to measure atmospheric pressure.
Inches of water column (inWC) and millimeters of water column (mmWC) are non-SI units of pressure that express the pressure exerted at the base of a column of water.
One inch of water column is equal to the pressure at the base of a water column exactly one inch high at 4°C, while one millimeter of water column corresponds to a water column exactly one millimeter high at the same temperature. One inch of water column is approximately equal to 249.089 Pascals.
These units have been used to measure pressure since the early days of fluid mechanics and are particularly useful in applications where low-pressure differentials are involved.
The torr is a non-SI unit of pressure, named in honor of the Italian physicist Evangelista Torricelli, who invented the mercury barometer. One torr is defined as 1/760 of an atmosphere, which is approximately equal to 133.32 Pascals. A smaller unit derived from the torr is the millitorr (mTorr), with one torr being equivalent to 1,000 millitorr. Torr and millitorr units are primarily used for measuring low-pressure environments, such as those found in vacuum systems.
To convert PSI to kPa, use the conversion factor from the pressure conversion chart: 1 PSI = 6.89476 kPa. Multiply the PSI value by 6.89476 to get the equivalent value in kPa. To convert kPa to PSI, divide the kPa value by 6.89476.
Yes, some pressure units are more common in specific industries. For example, inches of water column (inWC) and millimeters of water column (mmWC) are widely used in HVAC and plumbing. Similarly, inches and millimeters of mercury (inHg and mmHg) are commonly used in medical and meteorological fields.
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The static pressure sensor or static pressure transmitter is based on atmospheric pressure or absolute vacuum, and compares the difference…
In conclusion, understanding the Common Units of Pressure measurement and their conversion relationships is essential in many fields, including engineering, science, and industry. This knowledge helps to ensure accurate and consistent measurements across different systems and applications. The SI unit for pressure is the Pascal, but other common units include PSI, atmospheres, inches and millimeters of mercury, inches and millimeters of water column, and Torr.
By using the provided Common Units of Pressure conversion chart and conversion examples, you can easily convert between different pressure units. Remember that some units are more common in specific industries, so it’s crucial to choose the right unit for your application.
If you require high-quality pressure measuring instruments, we recommend Sino-Inst. As a professional supplier with extensive experience in the field, Sino-Inst offers a wide range of pressure measurement devices suitable for various industries and applications.Don’t hesitate to contact our knowledgeable team for any questions or assistance in selecting the right instrument for your application. Let Sino-Inst be your trusted partner in achieving accurate and reliable pressure measurements.
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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.
The Small Pressure Transducer/Sensor is characterized by its small size, the shortest can be 5CM. In some occasions where the installation location is small, it has an irreplaceable volume advantage. Small Pressure Transducer is that the pressure of the measured medium acts directly on the diaphragm of the sensor (stainless steel or ceramics). Make the diaphragm produce a micro-displacement proportional to the medium pressure. The resistance value of the sensor is changed, and the change is detected by the electronic circuit. And convert and output a standard measurement signal corresponding to this pressure. The interface, casing and electrical interface of the transmitter can be adapted according to the requirements of the user’s industry.
The Small Pressure Transducer/Sensor is characterized by its small size, the shortest can be 5CM. The interface, casing and electrical interface of the transmitter can be adapted according to the requirements of the user’s industry. The size of Small Pressure Transducer/Sensor also supports customization.
For example, the following product dimensions:
Miniature Pressure Sensor/Transducer
SI-51 Miniature Pressure Sensor/Transducer
Miniature Pressure Sensor is also called Miniature Pressure Transducer. The miniature pressure sensor is a miniature solid-state silicon force sensor integrated with MEMS technology. One-piece miniature stainless steel package. Make it have excellent dynamic performance. Small size, streamlined, strong, compact shape structure.
Product size Φ3, Φ5, M6, M8, M10. Can be specially designed according to specific working conditions;
Small size, streamlined appearance;
split structure. Optional standard voltage, current, digital signal output. Meet the requirements of various working conditions;
High dynamic frequency response, steep rising edge;
Wide measuring range. Any range between -100Kpa~0-10KPa…60MPa;
Low-pressure pressure transmitter is the application of conventional pressure sensor technology extended to the field of ultra-low pressure. While maintaining the original high performance, the pressure range can be as low as 0-5KPa. The advanced design makes this ultra-low pressure transmitter have the characteristics of fast response and good long-term stability.
The basic structure of its measurement part can be regarded as a space divided into two parts by the sensor. Including the case where one space is the entire universe.
When the pressures of these two parts are not equal, the force acting on the sensor causes the sensor to generate displacement or displacement tendency (force), and the pressure can be measured by detecting the displacement or displacement tendency.
Common sensors include diaphragms, spring tubes, and bellows, among which diaphragms are most widely used in transmitters.
There are many types of pressure sensors. Such as resistance strain gauge pressure sensors, semiconductor strain gauge pressure sensors, piezoresistive pressure sensors, inductive pressure sensors, capacitive pressure sensors, resonant pressure sensors, etc.
What’s the Difference Between a Pressure Transducer and a Pressure Switch? Simply put, the Pressure Transducer is a signal conversion and transmission device, and the pressure switch is a control switch device. This is the difference between a Pressure Transducer and a Pressure Switch. Let’s look at their differences in detail. And learn how to choose a pressure transmitter and pressure switch.
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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…
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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 degree of protection of the…
Small Pressure Transducer/Sensor-Low Cost-High Performance
Sino-Inst is a manufacturer of Small Pressure Transducer/Sensor. Small Pressure Transducers/Sensors have a lower cost than other industrial pressure transmitters. At the same time, Small Pressure Transducer/Sensor can customize high-performance parameters. Such as ultra-high temperature, ultra-high pressure, or micro-scale. Or special anti-corrosion materials, etc.
Sino-Inst is a manufacturer that produces and sells various types of automatic measurement and control instruments. The main products are: hydraulic pressure sensor, liquid level/water level sensor, Miniature Pressure Sensor/Transducer, micro pressure/negative pressure/vacuum pressure sensor, temperature transmitter, load cell and other pressure, differential pressure, liquid level, temperature , weighing sensors and various special pressure sensors and intelligent control systems.
If you need to purchase a Small Pressure Transducer/Sensor, or have any technical questions about Small Pressure Transducer/Sensor, please feel free to contact our engineers.
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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.
What’s the Difference Between a Pressure Transducer and a Pressure Switch? Simply put, the Pressure Transducer is a signal conversion and transmission device, and the pressure switch is a control switch device. This is the difference between a Pressure Transducer and a Pressure Switch. Let’s look at their differences in detail. And learn how to choose a pressure transmitter and pressure switch.
Difference Between a Pressure Transducer and a Pressure Switch
The Pressure Transducer uses the output as a standard signal, and is composed of a pressure-sensitive element and a conversion circuit. Using the pressure of the measured medium to produce a small change of current or voltage output on the pressure sensitive element.
The transmitter often needs to be used in conjunction with an external amplifier circuit to complete the process from pressure detection to control and display. Since the pressure sensor is a primary component, the signal fed back by the pressure sensor needs to be processed, analyzed, stored, and controlled by the measurement and control system. Make industrial automation equipment and engineering operation control more intelligent.
The pressure switch is a simple control device. When the measured pressure reaches the set value, it will automatically send out an alarm or control the function of turning on or off.
The pressure switch needs to be opened or closed under the set pressure. It can be used for simple control, and the output is the switch value.
The output of the pressure transmitter can be an analog signal or a digital signal. The post-processing is convenient, and it can also be converted into a standard transmitter signal for remote transmission.
If you want to know more about pressure sensors, you can consult Sino-Inst, thank you!
What is Pressure Switch?
A pressure switch is a mechanical switch that is activated by pressure to a set point. The switch is used to control a circuit by turning it on and off. Here the pressure point at which the switch is triggered is called the set point. The pressure threshold at which the switch is disabled is called the cut-off point. With enough force, the contacts can open or close the switch depending on their configuration.
This is a device that activates an electrical contact when a fixed fluid pressure is reached. Typically, this switch has two functions. The main function is to maintain the pressure or reservoir level of the system. The secondary function is to prevent equipment from operating at a lower efficiency or from being harmed. Its notation is as follows:
Structure of the pressure switch
The structure of the pressure switch mainly includes five parts. These are diaphragm, adjustment spring, lever, electrical contacts and terminals.
The diaphragm in this switch acts like a sensing element and is therefore used to detect pressure. This element is usually made of a pressure-sensitive, flexible material.
Adjusting the spring will change the set point or cut point, some switches have separate springs that control the set point and cut point.
The AUTO/OFF lever is used to manually activate or deactivate the switch, this lever is very helpful to turn off the switch throughout the installation or maintenance process. Sometimes, a knob is used instead of a lever, but the principle works the same.
The electrical contacts allow current to flow through them once they are contacted by an external power source. The terminals of the switch are used to connect an external power source to the contacts.
A pressure switch works by operating an electrical contact once a fixed fluid pressure is reached. The switch will make electrical contact when the pressure increases or the pressure decreases from a fixed preset pressure level.
Type of pressure switch
There are two types of pressure switches on the market today, mechanical and electronic.
Mechanical pressure switches are the most widely used due to their lower cost and ease of use compared to electronic pressure switches. These switches can be equipped with a mechanical pressure sensing element that deforms in response to fluid pressure. The different types of mechanical pressure switches are discussed below.
Piston pressure switch This type of switch is the most popular and is widely used in different applications. Once the pressure of the fluid changes, it moves the piston axially, which triggers the switch. The switch can directly or indirectly detect the pressure of the liquid. Therefore, direct inspection mainly involves seals like O-rings. to prevent liquids from entering the components. Whereas indirect detection mainly involves a flexible diaphragm that separates the piston from the fluid.
Diaphragm pressure switch This is a high quality switch primarily developed for safety critical applications. The main benefit of diaphragm pressure switches is that no voltage supply is required for the switching process. The switch consists of a metal membrane that is directly connected to the soaker portion of the switch and the diaphragm that activates the switch. The switch is used for monitoring process pressure and control in different industries such as chemical, petrochemical, natural gas, oil etc.
Bourdon tube pressure switch This is an elastomer or flexible metal tube that attaches to one end of the switch while leaving the other end free to move. Once the pressure of the liquid in the tube rises, it tends to level, and this movement is then used primarily to activate the switch. These switches are suitable for different applications such as chemical, general power stations and petrochemical as long as the operating force is medium to high.
Differential pressure switch This switch is useful when evaluating the force between two points within a system simply connected to two process ports on the upper or lower part of the device. If the pressure difference between the two sides increases by a certain threshold, the switch can be triggered. These switches are suitable for monitoring pressure drops in screens, filters and tank levels.
Electronic pressure switch. It can be used with pressure sensors such as strain gauges. These types of switches have analog capabilities, so they are not limited to an on or off position. Continuous and variable signals can also be transmitted for more precise monitoring. Therefore, these are not only switches, but also measuring instruments or transmitters. Some additional features of these electronic switches are field programmability of switching functions, time delays, hysteresis, set points, etc.
A pressure transducer is a device that converts pressure into a pneumatic signal or an electric signal for control and remote transmission.
It can convert the physical pressure parameters such as gas and liquid felt by the load cell sensor into a standard electrical signal (such as 4~20mADC, etc.). It can be used to supply secondary instruments such as indicating alarms, recorders, and regulators for measurement and indication, and process regulation.
Working Principle of Pressure Transducer
Pressure Transducer Electrical components that feel pressure are generally resistance strain gauges. The resistance strain gauge is a sensitive device that converts the pressure on the device under test into an electrical signal. The most widely used strain gauges are metal resistance strain gauges and semiconductor strain gauges.
There are two types of metal resistance strain gauges: wire strain gauges and metal foil strain gauges. Usually, the strain gauges are tightly bonded to the mechanical strain-generating substrate through a special adhesive. When the stress of the substrate changes, the resistance strain gauge also deforms together. Change the resistance value of the strain gauge, so that the voltage applied to the resistance changes.
The types of pressure transmitters are roughly as follows: resistance strain gauge pressure transmitters, semiconductor strain gauge pressure transmitters, piezoresistive pressure transmitters, inductive pressure transmitters, capacitive pressure transmitters, Resonant pressure transmitter and capacitive acceleration sensor, etc.
Piezoresistive pressure transmitter
The resistance strain gauge is a sensitive device that converts the strain change on the tested object into an electrical signal. It is one of the main components of piezoresistive strain transmitters. There are two kinds of resistance strain gauges, metal resistance strain gauges and semiconductor strain gauges.
Usually, the strain gauges are tightly bonded to the substrate that generates mechanical strain through a special adhesive. When the stress of the substrate changes, the resistance strain gauge also deforms together. Change the resistance of the strain gauge. This changes the voltage across the resistor.
Ceramic pressure transmitter
Principle Corrosion-resistant pressure transmitters have no liquid transfer, and the pressure acts directly on the front surface of the ceramic diaphragm. To make the diaphragm slightly deformed, thick film resistors are printed on the back of the ceramic diaphragm and connected to form a Wheatstone bridge.
Due to the piezoresistive effect of the varistor, the bridge produces a highly linear voltage signal proportional to the pressure and proportional to the excitation voltage. The standard signal is calibrated as 2.0 / 3.0 / 3.3 mV/V according to different pressure ranges. Compatible with strain gauge sensors.
Through laser calibration, the sensor has high temperature stability and time stability. The sensor comes with a temperature compensation of 0-70°C, and can be in direct contact with most media. ,
Diffused silicon pressure transmitter
The pressure of the measured medium acts directly on the diaphragm of the sensor, causing the diaphragm to produce a micro-displacement proportional to the pressure of the medium. The resistance value of the sensor is changed, and the change is detected by the electronic circuit. And convert and output a standard measurement signal corresponding to this pressure.
The piezoelectric materials mainly used in piezoelectric sensors include quartz, potassium sodium tartrate, and ammonium dihydrogen phosphate. Among them, quartz is a natural crystal in which the piezoelectric effect is found. Within a certain temperature range, the piezoelectric properties always exist, but when the temperature exceeds this range, the piezoelectric properties disappear.
Ceramic capacitive sensors are available for measurements in normal or aggressive media. Materials such as gas, gas or liquid, but not prone to precipitation, crystallization or stiffening are recommended. Applied to tank liquid level measurement, sea water, water on board, diesel oil, waste oil.
Selection of pressure switch and pressure transmitter
Both pressure switches and pressure transmitters are intelligent digital display pressure measurement products integrating pressure measurement, display, output and control. When choosing, you only need to remember the following 6 points to know what kind of pressure switch and pressure transmitter to use.
According to the characteristics of pressure switch and pressure transmitter, you can start from the following data that need to be measured:
The measured medium and the actual condition of the medium
The measured pressure range
Required measuring range
The temperature of the working conditions on site
The connection method used in conjunction with the working conditions
Installation location
According to the above 6 points of data and requirements, you can know what kind of pressure switch or pressure transmitter is needed. In addition, pressure switches and pressure transmitters are all non-standard customized products. It can be used according to the site Working conditions to decide.
What Is Flush Diaphragm Pressure Transducer? A flush diaphragm pressure transducer is a type of pressure sensor that measures the pressure of a fluid or gas by using a diaphragm…
Different Types of Pressure have different characteristics. Different pressure transmitters bear different pressure types. Common pressure types include absolute pressure, gauge pressure, negative pressure or vacuum, and differential pressure. Each…
As a clean energy, natural gas is widely used in many aspects such as industrial production, thermal power generation and residential gas heating. Although natural gas pipeline transportation has many…
The static pressure sensor or static pressure transmitter is based on atmospheric pressure or absolute vacuum, and compares the difference between the measured pressure and atmospheric pressure or absolute vacuum…
Ship Ballast Tank is to point to the ship’s ballast tank to load ballast to adjust the ship’s draft and metacentric height. It is an operation to ensure that the…
Do you know the difference between Pressure Transmitter vs Pressure Gauge? Pressure transmitters and pressure gauges are industrial process instruments used to measure the pressure of media.Understanding the difference between…
Pressure Transmitter 4-20mA is the most commonly used one in industrial process control. In industrial process control, the measurement and control of pressure has always been a very important parameter…
What is a gas pressure sensor? Gas Pressure Sensors are also called Gas Pressure Transducers. Gas Pressure Sensors convert gas pressure into standard electrical signals, such as 4~20mADC. Measurement, indication…
Sino-Inst is a manufacturer of Pressure Transducer and a Pressure Switch. We produce and sell all kinds of automatic measurement and control instruments and meters. The main products are: hydraulic pressure sensor, liquid level/water level sensor, Miniature Pressure Sensor/Transducer, micro pressure/negative pressure/vacuum pressure sensor, temperature transmitter, load cell and other pressure, differential pressure, liquid level, temperature , weighing sensors and various special pressure sensors and intelligent control systems.
Pressure Transducer and a Pressure Switch are commonly used instruments in industrial production process. The pressure switch turns the switch on or off at your given pressure. The output of the pressure sensor can be an analog signal or a digital signal, which is convenient for subsequent processing, and can also be converted into a standard transmitter signal for remote transmission.
If you need to purchase a Pressure Transducer and a Pressure Switch, or have any technical questions about Pressure Sensor/Transducer, please feel free to contact our engineers.
Request a Quote
Please enable JavaScript in your browser to submit the form
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.
A flush diaphragm pressure transducer is a type of pressure sensor that measures the pressure of a fluid or gas by using a diaphragm. The diaphragm is flush with the surface of the vessel or pipe in which the pressure is being measured. These types of pressure transducers are commonly used in a variety of applications. Including process control, hydraulic and pneumatic systems, and fluid level measurement.
A flush diaphragm pressure transducer is a type of pressure sensor that measures the pressure of a fluid or gas by using a diaphragm that is flush with the surface of the sensor. This type of transducer is commonly used in applications where the pressure being measured is in contact with the transducer. Such as in hydraulic systems or in process control applications.
There are several types of flush diaphragm pressure transducers, including:
Capacitive flush diaphragm pressure transducers: These transducers use a capacitive sensing element to measure pressure. The diaphragm is typically made of a dielectric material. Such as ceramic or polycarbonate, which allows the transducer to measure the change in capacitance as the diaphragm moves in response to pressure.
Piezoresistive flush diaphragm pressure transducers: These transducers use a piezoresistive sensing element to measure pressure. The diaphragm is typically made of a piezoresistive material, such as silicon. Which allows the transducer to measure the change in resistance as the diaphragm moves in response to pressure.
Strain gauge flush diaphragm pressure transducers: These transducers use a strain gauge sensing element to measure pressure. The diaphragm is typically made of a material that deforms under pressure, such as metal or plastic. And the strain gauge measures the change in resistance as the diaphragm deforms.
Flush diaphragm pressure transducers are known for their high accuracy, fast response time, and low hysteresis. They are also typically easy to install, as they do not require any additional mounting hardware or seals. However, they are not as durable as other types of pressure transducers and may be susceptible to damage if they are subjected to high pressure or impact.
Flush diaphragm pressure transducers have a number of advantages that make them well-suited for use in a wide range of applications. Some of the key benefits of flush diaphragm pressure transducers are outlined below.
Sanitary design:
Widely used in food, sanitation and brewing industries. Feel the pressure directly with the hygienic flat membrane. The hygienic flat diaphragm prevents fouling, unhygienic and clogging by viscous liquids.
Accurate measurement:
Flush diaphragm pressure transducers are accuracy and reliability when it comes to pressure measurement. The flush diaphragm design allows the transducer to make a direct contact with the fluid or gas being measured. Which helps to eliminate the potential for to temperature or viscosity changes. This makes flush diaphragm transducers an ideal choice for applications where accurate measurement is critical.
Versatility:
Flush diaphragm pressure transducers can be used to measure a wide range of pressures, from low to high. Making them suitable for use in a variety of applications. They can be used to measure gauge, absolute, or differential pressure, and are available in a range of materials to suit different media. More about: Absolute Pressure Vs Gauge Pressure.
Easy installation:
Flush diaphragm pressure transducers are relatively easy to install and require minimal maintenance. They can be mounted in any orientation and do not require any additional components or sensors to function.
Robust design:
Flush diaphragm pressure transducers are designed to be rugged and durable. Making them suitable for use in harsh or demanding environments. They can withstand high temperatures, pressure spikes, and other extreme conditions without breaking or failing.
Long-lasting:
With proper care and maintenance, flush diaphragm pressure transducers can have a long service life. Making them a cost-effective choice for applications where they will be in use for an extended period of time.
In summary, flush diaphragm pressure transducers are an accurate, versatile, and reliable choice for pressure measurement in a variety of applications. They are easy to install, robust, and long-lasting, making them a popular choice among engineers and technicians.
A flush diaphragm pressure transducer is a type of pressure sensor that is used to measure the pressure of a fluid or gas. It is called a “flush” diaphragm pressure transducer because it has a diaphragm that is flush with the surface of the sensor. This type of transducer is preferred in certain situations because it has several unique features and benefits.
A flush diaphragm pressure sensor is a pressure sensor designed with a smooth, flat surface that is flush with the process being measured. This makes them ideal for use in hygiene-sensitive industries. Such as food and beverage processing, pharmaceuticals and medical device manufacturing. Where it is important to minimize the risk of contaminants becoming trapped in crevices or protruding parts.
Flush diaphragm pressure sensors are used to measure the pressure of liquids, gases, and vapors in a variety of applications. Including process control, safety systems, and quality control. They are especially suitable for monitoring pressure changes in critical process streams. Such as fermentation in beer production or sterilization in medical device production.
One reason to choose a flush diaphragm pressure transducer is when the media being measured is highly viscous or contains particles that could damage the diaphragm of a traditional pressure transducer. The flush diaphragm design protects the diaphragm from being damaged by these mak contaminated it durable and reliable choice.
Another reason to choose a flush diaphragm pressure transducer is when the media being measured is at high temperatures. Traditional pressure transducers can be sensitive to temperature and may not provide accurate readings at high temperatures. The flush diaphragm design, on the others for hand, a more stable and accurate measurement at high temperatures.
In addition to these specific circumstances, flush diaphragm pressure transducers are often preferred in situations where a high level of accuracy and reliability is required. They are typically more expensive than traditional pressure transducers, but their durability and accuracy make them less susceptible to injury .
Overall, flush diaphragm pressure transducers are a useful tool for measuring the pressure of fluids and gases in a variety of applications. They are particularly well-suited for use in high temperature, high pressure, or high viscosity environments. And are preferred in situations where accuracy and reliability are of the utmost importance.
A flush diaphragm is a type of mechanical device that is used to seal off or control the flow of a fluid through a pipe or passageway. It consists of a flexible membrane or diaphragm that is attached to a rigid frame and is positioned within a pipe or valve body.
The diaphragm is designed to move in response to changes in the pressure or flow of the fluid, allowing the device to open or close in order to regulate the flow of the fluid.
Flush diaphragms are commonly used in a variety of applications, including in process control systems, fluid handling equipment, and industrial piping systems. They are known for their durability, reliability, and ability to maintain a tight seal over a wide range of operating conditions.
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.
A diaphragm pressure transducer works by converting pressure into an electrical signal.
It consists of a diaphragm that is exposed to the pressure being measured, a strain gauge that is attached to the diaphragm. And an electrical circuit that is connected to the strain gauge.
When the diaphragm is subjected to pressure, it flexes and causes the strain gauge to also deform. This deformation causes a change in the electrical resistance of the strain gauge. Which the electrical circuit detects and converts into an electrical signal.
The magnitude of the electrical signal is directly proportional to the pressure being applied to the diaphragm. The electrical signal can then be read by a meter or other device to measure the pressure.
As a clean energy, natural gas is widely used in many aspects such as industrial production, thermal power generation and residential gas heating. Although natural gas pipeline transportation has many…
Different Types of Pressure have different characteristics. Different pressure transmitters bear different pressure types. Common pressure types include absolute pressure, gauge pressure, negative pressure or vacuum, and differential pressure. Each…
The static pressure sensor or static pressure transmitter is based on atmospheric pressure or absolute vacuum, and compares the difference between the measured pressure and atmospheric pressure or absolute vacuum…
Do you know the difference between Pressure Transmitter vs Pressure Gauge? Pressure transmitters and pressure gauges are industrial process instruments used to measure the pressure of media.Understanding the difference between…
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Water Pressure Sensors Water Pressure Sensors refers specifically to instruments used to measure the pressure of tanks, pipes or underground water. Also called Water Pressure Transducers, or Water Pressure transmitters…
Sino-Inst is a well-respected manufacturer of Flush Diaphragm Pressure Transducers with a wealth of experience in the industry. Sino-Inst supplies more than 10 types of Flush Diaphragm Pressure Transducers.
A flush diaphragm pressure transducer is a type of pressure sensor that is designed for use in applications where it is necessary to measure pressure in a system that contains media that is highly viscous, particulate-laden, or otherwise abrasive.
The flush diaphragm design allows the transducer to be installed directly in the flow path of the process media, without the need for any additional mounting hardware or process fittings. This makes the flush diaphragm transducer well-suited for use in harsh industrial environments. Such as Those found in the oil and gas, chemical, and food and beverage processing industries.
The transducer utilizes a highly sensitive and accurate pressure sensing element. Which is protected by a robust and durable diaphragm that is resistant to wear and corrosion. The output of the transducer is typically an electrical signal that can be easily transmitted and processed by a control monitoring system.
We have a reputation for producing high-quality, reliable products that consistently meet the needs of their customers. Sino-Inst has a dedicated team of professionals who are highly skilled in the design and manufacture of Flush Diaphragm Pressure Transducers, and they take great pride in their work.
If you are in need of a Flush Diaphragm Pressure Transducer, Sino-Inst is an excellent choice.
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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.
As a clean energy, natural gas is widely used in many aspects such as industrial production, thermal power generation and residential gas heating.
Although natural gas pipeline transportation has many advantages, there are also risks such as leakage and failure. This can lead to interruptions or leaks in the delivery, causing significant financial losses and further safety risks. Therefore, sensors and data acquisition equipment are used for monitoring to achieve the purpose of leakage prevention and failure prevention. At the same time, risk issues such as distributed gas quality and consumption balance are monitored.
In the entire gas pipeline monitoring system, the detection of pressure-temperature-flow ensures operation, thereby preventing gas interruption.
In the oil and gas sector, pressure sensors are fundamental components for a wide range of applications. The pressure sensor can be used to monitor the pipeline pressure in real time. Not only that, the pressure sensor is also used in the gas furnace to measure the pressure of the gas in the gas supply pipeline, so as to judge whether the gas is sufficient or whether it is leaking.
Pressure transmitters play an important role in moving natural gas through thousands of natural gas pipelines. For monitoring natural gas pressure, measuring very low inlet and outlet pressures;
Various pressure types are also involved in the measurement process. Such as gauge pressure, absolute pressure, differential pressure, high pressure and differential pressure, etc.;
Special approval options such as ATEX Intrinsic Safety are available where natural gas may be present in the local atmosphere;
Leaks and even explosions may occur if the gas pressure in gas and gas pipelines is too high;
If the air pressure is too low, it will affect people’s daily use. Therefore, it is necessary to monitor the air pressure of each node through the pressure sensor, so that the air pressure is within a reasonable range;
The gas pipeline pressure sensor generally adopts the threaded installation form, which is simple and convenient and easy to ensure the sealing of the product. The signal output of the gas pipeline pressure sensor has analog signal and digital signal, which belong to the remote transmission type signal.
Sino-Inst’s pressure transmitter can be matched with industrial control system PLC or configuration system to ensure the accuracy and reliability of the automation system. The most important thing to choose a gas pipeline pressure sensor is to consider the quality of the product. The Sino-Inst gas pipeline pressure sensor is made of a corrosion-resistant pressure core and a stainless steel outer protective shell thread to ensure the durability of the product. The signal expansion transmitter also uses imported electronic components to ensure the stability of the gas pipeline pressure sensor.
Regardless of oil drilling, extraction, or transportation, there are various challenges and difficulties in the application of pressure sensors in the oil and gas industry. For example, key issues such as cost control, safe construction and environmental protection. Our engineers have rich practical experience in this industry, can fully understand the problems and difficulties you actually encounter in the oil and gas industry, and provide you with pressure measurement solutions based on your needs, combined with our own technology.
General-purpose temperature transmitter, suitable for temperature measurement of gas or liquid, such as air, natural gas, steam, water or engine oil and other non-corrosive media. At the same time, a variety of analog and digital signal outputs are available for selection. It is convenient for users to form a measurement and control system with other equipment.
The temperature transmitter is based on a standardized Pt100 or Pt1000 temperature sensing element, providing customers with accurate and stable temperature measurement. The product is cost-effective and can meet various application requirements. It is an ideal product for temperature measurement.
In addition to gas pressure detection, we also provide Industrial Gas Measurement with Digital Gas Mass Flow Meters.
The flow measurement of natural gas is currently mainly used in trade settlement and is relatively common. my country’s natural gas trade measurement is based on the volume or energy method under the legally required quality indicators for transfer measurement. At this stage, volume measurement is basically the main method.
At present, the flowmeter products used for natural gas flow measurement generally include: gas waist wheel flowmeter, gas turbine flowmeter, precession vortex flowmeter, vortex flowmeter, ultrasonic flowmeter and orifice flowmeter.
Let’s make a simple comparison on the use of these flow meters.
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In the entire gas pipeline monitoring system, the detection of pressure-temperature-flow is to ensure correct operation, thereby preventing gas interruption.
For the above characteristics, Sino-Inst provides high precision, good stability, low power consumption, easy to connect and supports customized pressure sensors, temperature sensors, flow meters, etc. Provide reliable pressure, temperature and flow monitoring support for gas pipeline monitoring.
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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.
Different Types of Pressure have different characteristics. Different pressure transmitters bear different pressure types. Common pressure types include absolute pressure, gauge pressure, negative pressure or vacuum, and differential pressure.
Each type of pressure works and causes differently. Therefore, when selecting, installing and using pressure transmitters, different types of pressure transmitters should be selected according to the specific pressure. At the same time, when measuring, it is necessary to have a detailed understanding of the specific specifications of the pressure transmitter.
Gauge pressure is also called relative pressure. It is usually represented by “G”, and its reference point is atmospheric pressure. That is, the output point of the sensor is zero when the atmosphere is open. It can also be considered that the sensor does not consider the influence of atmospheric pressure on its measurement .
The sealed gauge pressure is usually represented by “S”. The sensor of the sealed gauge pressure uses an absolute pressure chip. However, when the output is calibrated, it is calibrated according to the output of the gauge pressure.
Absolute pressure is also called absolute pressure. It is represented by capital letter “A”. Its reference point is vacuum;
It is generally used to measure working conditions that may generate negative pressure. The absolute pressure gauge should display 102Kpa when it is not in use, which is the local atmospheric pressure.
Differential pressure: As the name implies, it refers to the difference between two pressures. That is, the difference between the pressure on the positive pressure end of the sensor and the pressure on the negative pressure end.
So what are the practical applications of these pressures?
Gauge pressure is usually used to measure without considering the influence of atmospheric pressure. For example, gauge pressure sensors are used in submersible liquid level transmitters.
Absolute pressure is just the opposite. Because its reference point is vacuum pressure. Many customers will choose absolute pressure sensors when measuring pipeline pressure.
Sealed gauge pressure is rarely used in practical applications. For diffused silicon pressure sensors, some customers will choose sealed gauge pressure in the scene of high humidity measurement. The purpose is to prevent water vapor from entering from the air hole behind the pressure core Pressure chip. This causes the instability of the output of the pressure chip. The failure phenomenon that often occurs in the use of sealed gauge pressure is that if there is a large difference between the atmospheric pressure at the sensor calibration location and the sensor user’s use location, the zero output of the sensor will appear A certain deviation. As a result, the accuracy deteriorates.
Differential pressure measures the difference between two pressures. So many customers use differential pressure to measure flow.
How to choose the pressure type?
Like temperature and Flow, pressure is one of the most important physical state variables. The different types of pressure are mainly distinguished based on the reference pressure. When measuring the pressure of liquid or gaseous media, the pressure type and pressure range are important factors for pressure transmitters.
Pressure range: such as ≤0.02MPa, ≥3.5MPa, 0.035MPa~3.5MPa.
In layman’s terms, ordinary pressure gauges measure gauge pressure. Adding atmospheric pressure is absolute pressure, and there is a special absolute pressure gauge for measuring absolute pressure.
The pressure is taken at two different locations on the pipeline, and the difference between the two pressures is the differential pressure. The general differential pressure transmitter is to measure the differential pressure.
The sealing pressure is a pressure that is sealed in the back pressure chamber of the sensor as a reference pressure.
As atmospheric pressure may vary with location, weather and altitude. Therefore specific applications require different pressure types.
Whether it is absolute pressure, gauge pressure or differential pressure. If you are not sure which to choose. Our experienced and professional sales engineers are happy to assist you.
The pressure transmitter is the so-called universal gauge pressure transmitter. One side is open to the atmosphere and the other side is connected to the measured pressure. It is used to measure the pressure of pipelines, boilers, etc. The pressure transmitter has only one impulse tube and measures pure pressure.
The differential pressure transmitter has two pressure pipes and measures the pressure difference. If the differential pressure transmitter is only connected to the positive membrane chamber or the negative membrane chamber, it is equivalent to the measurement of the pressure transmitter. The two sides of the differential pressure transmitter are respectively connected to different pressures. Measure the height of the liquid level according to the pressure difference and cooperate with the orifice plate to measure the flow of the pipeline.
One side of the absolute pressure transmitter is evacuated, and the pressure on the other side is absolute pressure. Suitable for absolute pressure applications.
The Micro differential pressure transmitter uses 2E capsule (0.0-1.5KPA) to improve the accuracy of measuring small pressure.
The high static pressure differential pressure transmitter uses a high static pressure capsule. The so-called static pressure means that when the pressure on both sides of the pressure transmitter is the same, its output current should be 4.00MA. However, when the pressure on both sides of the ordinary differential pressure transmitter increases to more than 25MPA at the same time, it is difficult to guarantee the output at 4.00MA. Therefore, high static pressure differential pressure transmitters are mostly used for flow, liquid level measurement and high pressure occasions.
What else can a pressure transmitter measure?
Liquid Level
Pressure transmitters and differential pressure transmitters measure pressure and differential pressure (the difference between the two pressures) by name. But they can be measured indirectly by a lot. In addition to measuring pressure, it can also measure the liquid level in the equipment.
When measuring the liquid level in an atmospheric pressure vessel, a pressure transmitter is all that is needed. When measuring the liquid level of a pressure vessel, consider using two pressure/differential pressure transmitters. That is, one set for the lower limit of measurement and one set for the upper limit of measurement. They have to output signals for subtraction. The liquid level can be measured.
Density
It can also be used to measure the density of the medium when the liquid level and pressure in the container do not change.
Flow
The measuring range of the pressure transmitter can be made very wide. Starting from absolute pressure 0, it can reach more than 100 MPa (general situation). In addition to measuring the differential pressure value of the two measured pressures, the differential pressure transmitter. It can also cooperate with various throttling components to measure the flow rate of medium fluid.
The static pressure sensor or static pressure transmitter is based on atmospheric pressure or absolute vacuum, and compares the difference between the measured pressure and atmospheric pressure or absolute vacuum…
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Sino-Inst is a manufacturer of Different Types of Pressure Transmitters. We supply more than 50 types of Differential Pressure Transmitters. 30% are gauge pressure transmitters, 30% are differential pressure transmitters, and the rest are absolute pressure and other types pressure transmitter.
The concept of differential types of pressure is involved in the selection of pressure transmitters: absolute pressure, gauge pressure, negative pressure and differential pressure.
Although their explanations are somewhat difficult to understand, the principle is actually very simple. You only need to know this, the principle of these four pressure transmitters is the principle of differential pressure. That is, one side is connected to the medium pressure, and the other side is the reference pressure. The only difference is the pressure at the connection on the reference pressure side.
Sino-Inst has provided Different Types of Pressure measurement solutions to customers for many years. Our Different Types of Pressure Transmitters, made in China. Widely exported to the United States, Britain, Germany, South Africa, Norway and other countries.
If you need Different Types of Pressure Transmitters, but have technical questions, please feel free to contact our sales engineers.
Request a Quote
Please enable JavaScript in your browser to submit the form
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.
