Pressure Transducers for Air Conditioning & Refrigeration

Pressure Transducers for Air Conditioning & Refrigeration

The necessity of pressure sensors in refrigeration

About Refrigeration cycle

To gain a deeper understanding of the role of refrigerants in the refrigeration process and its impact on pressure sensor requirements, we can analyze each step of the refrigeration cycle and its thermodynamic principles in detail:

Compression Phase: The refrigeration cycle begins with the compressor, where low-pressure refrigerant gas is compressed. During this process, the temperature and pressure of the refrigerant increase significantly. As the gas is compressed, the distance between the molecules decreases, resulting in an increase in energy, which increases the temperature.

Condensation stage: The high-temperature and high-pressure gaseous refrigerant then flows into the condenser. Here, it releases heat to the external environment, thereby condensing into a liquid state. This stage is a critical link in the transfer of heat from the refrigeration system to the external environment.

Expansion stage: The condensed liquid refrigerant passes through the expansion valve, and its pressure and temperature decrease significantly. During this process, the refrigerant partially evaporates, forming a low-temperature mixture of liquid and gas.

Evaporation stage: This low-temperature refrigerant mixture enters the evaporator, where it absorbs heat from the surrounding air and becomes gaseous again. This process causes the temperature of the surrounding environment to decrease, achieving a cooling effect.

The entire refrigeration cycle is a precise thermodynamic process, which has strict requirements on the pressure and temperature control of the refrigerant. Therefore, high-quality pressure sensors play a vital role in this process. They ensure that the refrigerant is maintained at optimal pressure and temperature at each stage to ensure efficient and stable operation of the entire refrigeration system.

So why should you care about measuring pressure in this whole process?

Benefits of pressure sensors in refrigeration

If your refrigeration system does not properly measure all inputs and outputs, your system will not operate properly. Typically, the pressure sensor is placed near the compressor outlet, but there can be more sensors depending on the application and complexity of the refrigeration system. The data collected by the pressure sensor is sent to the controller, which can automatically control the compressor in the system.

The following are the benefits of using pressure transmitters in air conditioning and refrigeration systems:

  • Accurately monitor pressure: The pressure transmitter can accurately monitor the pressure within the system to ensure that the system is operating at its best.
  • Improved cooling efficiency: Proper pressure levels help improve the cooling efficiency of the system while reducing energy consumption.
  • Detect potential problems in time: Real-time monitoring can detect problems such as leaks or pressure abnormalities in time to prevent system failure.
  • Reduce repair costs: By preventing failures, pressure transmitters help reduce repair costs and downtime.
  • Extended system life: Reduces wear and damage caused by pressure fluctuations, extending the life of your air conditioning and refrigeration systems.
  • Improve overall performance: ensuring efficient, reliable and economical operation of the entire air conditioning and refrigeration system.

How to Choose Pressure Transducers for Refrigerant

There are several key factors to consider when selecting and using pressure transmitters in different types of refrigeration systems:

Type and size of system: The first thing to consider is the type and size of the refrigeration system (such as a household air conditioner, commercial cold storage, or industrial refrigeration system). Different types and sizes of systems have different requirements for the accuracy and durability of pressure transmitters.

Temperature tolerance: The operating temperatures of refrigeration systems can be extremely different. Therefore, the pressure transmitter selected must be able to work properly within these temperature ranges to ensure accurate and stable performance.

Pressure range and accuracy: Different refrigeration systems may need to operate within different pressure ranges. When selecting a pressure transmitter, make sure it can provide accurate measurements over the required pressure range.

Ease of installation and maintenance: Choosing a pressure transmitter that is easy to install and maintain can reduce system downtime and maintenance costs.

In summary, when selecting and using a pressure transmitter, decisions should be made based on the specific refrigeration system type, operating environment, required pressure range and accuracy, and ease of installation and maintenance. This not only ensures efficient operation of the refrigeration system, but also improves overall safety and reliability.

Featured Refrigeration Pressure Transducers

SI-303 Low-Pressure Transducer
Low pressure transducers for air and non-corrosive gases low pressure measurement. 0 ~ 2.5kPa to 0 ~ 30kPa measurable.
SI-300 Pressure Transducer 4-20mA/Voltage
The 4-20mA/ Voltage Pressure Transducer,
also called pressure transmitter 4-20mA,
is a pressure sensor with4-20ma/Voltage output.
SI-520 Digital Pressure Sensor
Digital Pressure Sensor is particularly suitable for use in computer control systems. RS485 half-duplex working mode.
SI-503K Gas Pressure Sensor
Gas pressure sensor for industrial gas pressure monitoring. Pagoda gas nozzle Φ8. Such sensors are also commonly referred to as wind pressure transmitters, exhaust pressure sensors.
SI-702 High Pressure Sensor
High pressure sensor is pressure transmitter designed for high pressure measure&control. 0 ~ 40MPa… 600MPa. M20 × 1.5, G1 / 2 (others are customized according to requirements)
SI-338 Ceramic Pressure Sensor
Ceramic pressure sensor is a pressure sensor refined from a thick ceramic base using a refined ceramic base. Cost-effective. Support OEM processing. 0-0.2MPa -…- 40MPa
SI-706 Combined Pressure and Temperature Sensor-Dual function
Combined pressure and temperature sensor for Simultaneous measurement of pressure and temperature.
Thermocouple types: J, K, E type or PT100 platinum resistance. Two outputs do not affect each other. 
SI-512H High Temperature Pressure Sensor
High Temperature Pressure Sensor for pressure measurement of high temperature gas or liquid. Such as steam pressure. High temperature up to 800 ℃.

More Pressure Measurement Solutions

Before deciding which pressure sensor your system will use, carefully define the needs of your refrigeration system. This will guide product selection and enable your team to create the most efficient refrigeration system possible.

Choosing a Sino-Inst pressure transmitter means choosing high accuracy, reliability and excellent customer service. Sino-Inst provides comprehensive customer support, including technical consultation, installation guidance and after-sales service, ensuring customers can make full use of our products.

Customer reviews and feedback are the best proof of our product quality and service. Many customers appreciate the performance and reliability of our pressure transmitters, especially in improving system efficiency and reducing maintenance costs. They also speak highly of our responsive customer service team, which not only strengthens their trust in our products but also enhances their experience.

In short, when you choose Sino-Inst’s pressure transmitter, you will get high-performance products and a first-class customer experience. We are committed to providing the best solutions for your refrigeration system needs.

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Analog Pressure Transducers vs Digital Pressure Transducers | How to Choose?

In industrial control systems, Pressure Transducers play a key role in monitoring and regulating pressure. You must have heard of 4-20mA pressure transmitter, 0-10V pressure transmitter, RS485 pressure transmitter, etc. When it comes to analog Pressure Transducers and digital Pressure Transducers, although they have the same goal – to accurately deliver a pressure signal, the technical details and practical application are very different.

Next, we’ll dive into the differences between analog Pressure Transducers and digital Pressure Transducers. Help you make informed decisions and ensure your control system operates efficiently and accurately.

We Sino-Inst are professional pressure transmitter manufacturers. More than 50 types of pressure transmitters are available to choose from. The output signals of the pressure transmitter are available in a variety of options: mV/V, 0/5 V, 0/10 V, 4/20 mA, as well as RS485, HART, etc. We also offer multiple levels of customization to meet your needs. Including customization of installation dimensions, measurement range, explosion-proof and anti-corrosion, high temperature, low temperature, etc.

Featured Analog & Digital Pressure Transducers

SI-303 Low-Pressure Transducer
Low pressure transducers for air and non-corrosive gases low pressure measurement. 0 ~ 2.5kPa to 0 ~ 30kPa measurable.
SI-703 Flush diaphragm pressure sensor
Flush membrane / diaphragm structure, anti-blocking design. Pressure measurement of viscous media.
SI-10 Liquid pressure sensor
Liquid pressure sensor is widely used for pressure measurement of various liquids. Like water or oils. IP68 waterproof.
SI-702S Ultra-High Pressure Senors
Pressure sensor for Ultra high pressure applications. Ultra high pressures up to 15,00MPa. 0-2000MPa to 0-7000MPa (customized).Ball head M20 × 1.5, cone head M20 × 1.5.
SI-512H High Temperature Pressure Sensor
High Temperature Pressure Sensor for pressure measurement of high temperature gas or liquid. Such as steam pressure. High temperature up to 800 ℃.
SI-350 Sanitary Pressure Transmitter
Sanitary Pressure Transmitter, also called tri clamp pressure transmitter,
is the pressure transducer with the flush diaphragm (flat membrane) as the pressure sensor.
SI-300 Pressure Transducer 4-20mA/Voltage
The 4-20mA/ Voltage Pressure Transducer,
also called pressure transmitter 4-20mA,
is a pressure sensor with4-20ma/Voltage output.
SI-390 Industrial Pressure Transmitter
Pressure transmitters for general industrial applicaitons. -0.1kPa ~ 0 ~ 0.01kPa ~ 100MPa ~150MPa. 0.1% FS, 0.25% FS, 0.5% FS. 4-20mA (2-wire system), 0-5 / 1-5 / 0-10V (3-wire system)
SI-520 Digital Pressure Sensor
Digital Pressure Sensor is particularly suitable for use in computer control systems. RS485 half-duplex working mode.
SI-706 Combined Pressure and Temperature Sensor-Dual function
Combined pressure and temperature sensor for Simultaneous measurement of pressure and temperature.
Thermocouple types: J, K, E type or PT100 platinum resistance. Two outputs do not affect each other. 

More about pressure transmitters

The pressure transmitter converts the pressure changes of the medium into electrical signal output. When the pressure of the medium acts on the sensor, the sensor will produce corresponding physical deformation. This deformation is converted into an electrical signal through an electronic circuit, usually a standard signal such as 4-20mA or 0-10V. In this way, pressure changes can be read and processed by the control system or display device. This enables the monitoring and control of pressure in industrial processes.

Different types of pressure transmitters use a number of different operating principles to achieve this:

Pressure Transmitter Working Principle

Submersible pressure transducer is a sensor specially designed for measuring liquid pressure and can be completely immersed in liquid.

The static pressure of the liquid is sensed through the sensitive diaphragm of the sensor, and this pressure is converted into an electrical signal output. Common output signals include 4-20mA or 0-10V, etc.

Submersible pressure transmitters have good waterproof characteristics and are widely used in water level monitoring, deep well measurement, sewage treatment and other fields. Able to accurately provide pressure readings in harsh environments. Because its structural design allows it to withstand extended dives, it is particularly useful in applications requiring long-term or continuous water pressure monitoring.

A differential pressure transducer is an instrument used to measure the pressure difference between two pressure points. It converts the voltage difference into a continuous electrical signal output, such as 4-20mA or 0-10V.
This type of transmitter is widely used in areas such as flow measurement, liquid level monitoring and filter clogging detection. By measuring the pressure difference between two points in a pipe, tank or system. Differential pressure transducers can provide important information about fluid flow characteristics and system performance to help achieve precise process control and optimization.

There are subtle functional differences between pressure transducers and pressure sensors.
A pressure sensor generally refers to a device that detects pressure and converts it into an electrical signal. This electrical signal is generally raw and unprocessed and requires further conversion and amplification.
The pressure transducer not only contains all the functions of the pressure sensor, but also standardizes this electrical signal. Output industry standard signals such as 4-20mA or 0-10V. Can be read directly by the control system or display device.

In short, pressure sensors focus more on the detection of pressure, while pressure transducers provide a complete pressure measurement solution that can be used by the system.

Pressure transmitters can be divided into analog output and digital output according to the output signal. Analog output means that the output signal is an analog quantity, such as 4-20mA, 0-5V, etc. Digital output means that the output signal is a digital quantity, such as RS485, CAN bus, etc.

Analog Pressure Transducers

Analog Pressure Transducers convert mechanical pressure into continuous analog electrical signals, such as 4-20mA current or 0-10V voltage. This conversion occurs through physical pressure acting on the sensor’s sensitive element (usually a diaphragm or piezoelectric material), causing it to deform. This deformation is then converted into an electrical signal, the size of which is proportional to the pressure acting on the sensor.

The advantages of Analog Pressure Transducers are their simple structure, low cost, and durability. They typically do not require complex programming or special interfaces, making them easy to integrate with existing systems. In addition, analog signals can withstand electrical noise during long-distance transmission, which makes analog transmitters ideal for use in industrial environments with high electromagnetic interference.

Digital Pressure Transducers

Digital Pressure Transducers convert pressure information into digital signals. In terms of working mechanism, these transmitters usually contain a pressure sensor that senses pressure changes and converts it into an electrical signal, and then converts the analog signal into a digital signal through a built-in analog-to-digital converter (ADC). During this process, the transmitter will also perform signal amplification, filtering and digital processing to ensure the accuracy and stability of the output signal.

The advantages of Digital Pressure Transducers are significant. First, they provide greater accuracy and resolution because digital signals are not as susceptible to noise as analog signals.
Second, digital transmitters often have self-calibrating capabilities, reducing maintenance.
Furthermore, these transmitters can interface directly with computer systems to facilitate remote monitoring and data logging.

Analog Pressure Transducers vs Digital Pressure Transducers

Accuracy comparison

Digital Pressure Transducers: Typically provide greater accuracy. The high resolution of digital signals and their resistance to external interference. This gives digital transmitters an advantage in providing accurate readings.

Analog Pressure Transducers: Can provide relatively accurate measurements in environments without severe electromagnetic interference. However, signal attenuation may occur in long-distance transmission or high-interference environments.

Stability

Digital Pressure Transducers: In theory, digital technology can provide better stability, but special designs may be needed to protect electronic components in extreme environments.

Analog Pressure Transducers: With simple structure and mature technology, they are more suitable for harsh industrial environments, especially in high temperature, high pressure, and high vibration situations.

Responding speed

Digital Pressure Transducers: Fast response times, especially where fast change detection is required.

Analog Pressure Transducers: Relatively slow to respond, but generally adequate for most industrial applications.

Ease of use

Digital Pressure Transducers: Can integrate directly with computer systems and modern control systems to provide easy-to-understand digital readouts, but may require complex programming and configuration.

Analog Pressure Transducers: Simple to install, easy to use, no complex configuration required, suitable for users of different technical levels.

Cost-benefit ratio and long-term return on investment

Digital Pressure Transducers: The initial investment is higher, but in the long term, accurate data collection and processing increases efficiency and reduces maintenance costs, thus potentially providing a better return on investment.

Analog Pressure Transducers: Low initial cost, suitable for projects with limited budgets. While long-term maintenance costs may be higher, its stability and durability may reduce overall replacement and repair costs.

When selecting a suitable pressure transmitter, all of the above factors should be considered to ensure that performance requirements are met while maximizing cost-effectiveness within the budget.

More Pressure Measurement Solutions

When faced with choosing between Analog Pressure Transducers or Digital Pressure Transducers, the key is to understand the capabilities and benefits of each. Analog Pressure Transducers are known for their stability and cost-effectiveness, while Digital Pressure Transducers are favored for their high accuracy and ease of integration.

We at Sino-Inst not only offer a wide range of pressure transmitters, but also cover a wide range of flow, level and temperature measuring instruments. These instruments have excellent performance in the fields of crude oil flow measurement, liquid level measurement, and temperature measurement.

If you are looking for reliable pressure measurement solutions, please contact us. Sino-Inst will provide you with professional advice and customized services to help your project succeed.

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Vacuum Pressure Transducers | Product List and FAQs

What is a vacuum pressure transducer?

Vacuum pressure transducer is an instrument that can measure and convert vacuum pressure signals into standard electrical signals (such as 4-20mA, 0-5V, etc.). Typically used for precise monitoring and control of pressure in closed systems with high vacuum levels. The measurement range is usually from below atmospheric pressure to a specific low pressure value. It is widely used in vacuum acquisition and control systems in chemical, pharmaceutical, food processing and other industries as well as scientific research experiments.

Sino-Inst manufactures and supplies a range of pressure transmitters. This covers negative pressure transmitters, absolute pressure transmitters, high vacuum absolute pressure transmitters, etc.

The high vacuum absolute pressure transmitter uses imported metal film capacitor and ionization gauge technology. The minimum range can be extended to 200Pa to achieve true high vacuum pressure measurement.
The negative gauge pressure transmitter uses a MEMS diffused silicon sensor. Through range migration and equipped with a dedicated signal processing unit, accurate measurement of negative pressure can be achieved. The product has stable performance and long service life, and the measuring range can be selected arbitrarily between 0~-100KPa.
It can be specially designed and customized according to the specific requirements of users to meet various practical application needs.

Featured Pressure and Vacuum Transmitters

FAQs

Can pressure transmitters measure vacuum?

Pressure transmitters do measure vacuum. Pressure transmitters designed specifically for measuring vacuum are capable of measuring pressure levels below atmospheric pressure and are often referred to as vacuum pressure transducers.

How does a negative pressure transmitter work?

The working principle of a negative pressure transmitter is usually to use pressure sensing elements (such as piezoelectric, capacitive, strain gauge, etc.) to sense the pressure difference, and then convert the physical pressure changes into electrical signals. In a negative pressure environment, the sensing element of the transmitter will deform accordingly according to the magnitude of the negative pressure, thereby changing the resistance, capacitance or other electrical performance parameters. These changes are converted into a standard electrical signal output through the signal processing circuit, such as 420mA. Or 05V, etc. to facilitate pressure monitoring and control.

How many PSI is full vacuum?

A complete vacuum is a state without any gas molecules at all, and its pressure is zero. In pressure measurement, atmospheric pressure is usually used as the reference. The standard value of atmospheric pressure is 14.696 PSI (pounds per square inch), so the pressure in a full vacuum state can be considered to be 0 PSI. In technical applications, this complete vacuum state is difficult to achieve. What is often called “full vacuum” is a relative term. In fact, there may be very slight pressure.

Are vacuum pressure transducers and negative pressure transducers the same?

Vacuum pressure transducers and negative pressure transducers have similarities in application, but there are differences between them.

Vacuum pressure transducers are usually used to measure pressure below atmospheric pressure, mainly for measuring vacuum. Its measurement range is usually from standard atmospheric pressure (101.325 kPa) to absolute zero pressure, which is a complete vacuum state.

Negative pressure transducers are used to measure pressure below atmospheric pressure but not reaching a vacuum state, also called negative pressure or negative differential pressure. Its measurement range is usually from above atmospheric pressure to some low pressure value, but not to a complete vacuum.

Both are devices that work at standard atmospheric pressure and are used for pressure measurement in low-pressure environments of varying degrees. When selecting equipment, you need to determine whether to use vacuum pressure transducers or negative pressure transducers according to the pressure range of the specific measurement environment.

What are the types of pressure sensors?

Pressure sensors can be classified based on the range of pressures they measure over the operating temperature range and, most importantly, the type of pressure they measure. Pressure sensors have different names depending on their purpose, but the same technology may be used under different names.

  1. Absolute pressure sensor
    • This pressure sensor measures pressure relative to a complete vacuum.
  1. Gauge pressure sensor
    • This pressure sensor measures pressure relative to atmospheric pressure. A tire pressure gauge is an example of a gauge pressure measurement; when it indicates zero, it is measuring the same pressure as the ambient pressure.
  1. Vacuum pressure transducers
    • Used to describe sensors that measure pressure below atmospheric pressure, showing the difference between low and atmospheric pressure, but can also be used to describe sensors that measure absolute pressure relative to a vacuum.
  1. Differential pressure sensor
    • This sensor measures the difference between two pressures, one attached to each side of the sensor. Differential pressure sensors are used to measure many properties. For example, pressure drop across an oil filter or air filter, fluid level (by comparing the pressure above and below the fluid), or flow rate (by measuring the change in pressure within a limited range). Technically, most pressure sensors are actually differential pressure sensors; for example, a gauge pressure sensor is just a differential pressure sensor with one side open to the surrounding atmosphere.

More About: Unraveling the Pressure Puzzle: Absolute Pressure vs Gauge Pressure

pressure conversion tools

Tools for converting and calculating pressure values. Help users choose suitable pressure sensors and transmitters!

Absolute pressure-Gauge pressure ConverterPressure Unit ConverterLiquid Depth/Level to Hydrostatic Pressure Calculator
Differential Pressure CalculatorPressure Transducer 4-20ma Output CalculatorPressure to Liquid Level Calculator

In many industrial situations, a closed environment needs to be evacuated. At this time, the vacuum pressure transducers can be used to detect the vacuum degree of the closed environment in real time. Generally, vacuum pressure transducers that measure negative pressure have the function of detecting negative pressure and positive pressure at the same time.

We at Sino-Inst are professional pressure transmitter manufacturers. We offer over 50 types of pressure transmitters. Can measure gauge pressure and absolute pressure. Negative pressure, vacuum, differential pressure, etc. Features a variety of analog outputs including 4-20ma, 0-10 VDC and 0.5-4.5 VDC proportional outputs. We also offer industry-proven rugged vacuum sensor designs and flexible, low-cost and reliable OEM solutions.

Do you need the right equipment to measure vacuum pressure? Please feel free to contact our sales engineers for consultation!

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What Is Psi in Pressure Sensor?

You may have seen the word “Psi” in various equipment specifications, or you may need to use this unit for measurement and adjustment during work. But do you really understand what Psi stands for?

PSI is the abbreviation of pounds per square inch. It is one of the pressure units used to indicate the pressure of liquid or gas. Widely used in automobiles, bicycles, gas tanks and air compressors, etc. On pressure sensors and pressure transmitters, commonly used pressure units include bar (Bar) and kilopascal (KPa). But in the United States and the United Kingdom, PSI is the most commonly used unit of pressure. 1 PSI is equal to 0.0689476 bar or 6.89476 kPa.

Pressure sensors are available in a variety of reading units. Psi (pounds per square inch), as one of them, is widely used in industrial systems in many countries.

Why is it preferred over other units in some situations? Let’s learn together What Is Psi in Pressure Sensor. I believe this article can help you better understand this key indicator of pressure sensors. let’s start!

0-50/100/21755/101526 PSI High Accuracy Pressure Transducers

What Is Psi in Pressure Sensor?

Before we delve into the world of pressure sensors, we first need to understand the unit of measurement for pressure – Psi. Psi stands for “pounds per square inch” and is a unit of pressure. It is widely used in many aspects of industry, engineering and daily life.

The definition and origin of Psi

Psi is a unit of pressure measurement that belongs to the Imperial system of units. It measures how many pounds of force are exerted on a square inch of area.

From a historical perspective, imperial units have been widely used in industry since the early industrial revolution originated in England. Although many countries in the world today use the metric system, which is Newtons per square meter (Pascals). But in countries such as the United States, Psi is still one of the most commonly used units of pressure.

More Common Units Of Pressure.

Conversion relationship between Psi and other pressure units

1 Psi is equal to 6894.76 Pascals (Pa).
Likewise, 1 Pascal is equal to 0.000145038 Psi.

In addition to Pascal, Bar is also common, and 1 Bar is equal to 14.5038 Psi.
These conversion relationships are crucial to engineers. Because they need to be able to switch between different measurement systems to ensure accuracy and versatility.
There are many convenient pressure unit conversion tools available:

Absolute pressure-Gauge pressure ConverterPressure Unit ConverterLiquid Depth/Level to Hydrostatic Pressure Calculator
Differential Pressure CalculatorPressure Transducer 4-20ma Output CalculatorPressure to Liquid Level Calculator

More About Psi and Pressure Sensors

Understanding Psi is fundamental to using pressure sensors. For example, when inflating car tires, we often see the recommended Psi value, which tells us the standard air pressure that should be tolerated per square inch inside the tire. Similarly, various hydraulic systems, air compressors, etc. will use Psi as the measurement and reference unit for pressure.

In industrial applications, Psi allows engineers and technicians to accurately monitor and regulate the pressure in the system. This is crucial to ensuring the normal operation of equipment, preventing accidents, and maintaining production quality.

We at Sino-Inst supply various pressure transmitters with PSI display units. And the display unit can be adjusted to various common pressure units such as MPa, Bar, KPa, etc. If you happen to need it, please feel free to contact our sales engineers!

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What Is a Hydraulic Pressure Transducer? and Product List

What is a hydraulic pressure transducer?

A hydraulic pressure sensor is a sensor used to measure pressure in a hydraulic system. It can monitor and control the pressure of the hydraulic system by converting the pressure into electrical signals. to ensure the pressure within the system is at the correct level, or to allow the controller to increase or decrease pressure.

Hydraulic Pressure Transducers are used in a variety of hydraulic systems such as power steering systems, shock absorbers, braking systems, utility vehicles such as excavators and aerial work platforms, lifts and industrial machinery such as hydraulic presses.

As a manufacturer of pressure transmitters, we at Sino-Inst supply a variety of Hydraulic Pressure Transducers. Including customized high pressure, high temperature, and other product parameters. The product list below is for your reference.

Hydraulic Pressure Transducers

hydraulic pressure transducer Applications

Hydraulic pressure transducer is a device that converts hydraulic signals into electrical signals and is widely used in a variety of hydraulic systems and industrial processes. The following are several main applications of hydraulic pressure sensors: booster cylinders, superchargers, gas-liquid booster cylinders, gas-liquid boosters, presses, compressors, air conditioning and refrigeration equipment and other fields.

  1. Hydraulic system monitoring and control: Hydraulic pressure sensors can be used to monitor the working pressure in the hydraulic system to ensure its normal operation. When the pressure reaches or exceeds the set upper or lower limit, the alarm or control system can respond. Such as adjusting the output of the pump, opening or closing valves, etc.
  2. Aerospace applications: In the hydraulic systems of aircraft and spacecraft, pressure sensors are used to ensure the normal operation of the system. Monitor the pressure status of the aircraft landing gear, brakes and flight control systems.
  3. Automobile industry: In the hydraulic brake system, power steering system and suspension system of automobiles, pressure sensors may be used to ensure the normal operation and safety of the system.
  4. Industrial automation and manufacturing: In production lines, injection molding machines, pressure forming machines and other equipment, hydraulic pressure sensors are used to monitor and control the process to ensure product quality.
  5. Medical Equipment: In some medical equipment, such as cardiac assist equipment, hydraulic pressure sensors are used to monitor and control the flow and pressure of hydraulic fluid.
  6. Energy and power industry: In power stations and renewable energy equipment, hydraulic pressure sensors can be used to monitor the pressure of liquid media (such as hydraulic oil) to ensure normal operation of the equipment.

Hydraulic Pressure Transducers Installation

The installation location of the hydraulic pressure sensor should be determined based on the actual conditions of the hydraulic system. Generally speaking, the sensor should be installed at the most important position in the hydraulic system to monitor the highest pressure of the hydraulic system.

Common installation locations include the following:

  1. Pump outlet: Installed at the pump outlet, the output pressure of the pump can be monitored to ensure the normal operation of the pump.
  2. The inlet of the oil cylinder: Installed at the inlet of the oil cylinder, the pressure of the oil cylinder can be monitored to ensure the normal operation of the oil cylinder.
  3. The outlet of the oil cylinder: Installed at the outlet of the oil cylinder, the output pressure of the oil cylinder can be monitored to ensure the normal operation of the oil cylinder.
  4. High-pressure side of the oil line: Installed on the high-pressure side of the oil line, the highest pressure of the entire hydraulic system can be monitored to ensure the normal operation of the hydraulic system.

More about Pressure Transmitter Installation Guide.

FAQ

The function of the pressure sensor is to convert the pressure signal into an electrical signal. It usually consists of sensitive components and conversion components. When subjected to pressure, the sensitive element will produce physical or chemical changes, and then this change will be converted into an electrical signal output through the conversion element.

The 4-20mA pressure transducer is a pressure sensor that outputs a 4-20mA current signal. The 4-20mA signal is a standard signal in industrial automation. It has good anti-interference and can be transmitted over long distances. In this type of sensor, 4mA usually represents the lowest pressure value, while 20mA represents the maximum pressure value.

The three common pressure transmitters are:

  • Strain gauge pressure sensor: This sensor detects pressure by measuring the resistance change of a strain gauge. When pressure is applied to a strain gauge, its shape and size change, causing its resistance value to change.
  • Capacitive Pressure Sensor: In a capacitive sensor, the pressure changes the distance between two conductive plates or the dielectric constant of the medium, thereby changing the capacitance value.
  • Piezoelectric pressure sensors: When certain materials, such as quartz, are subjected to pressure, they generate an electrical charge. Piezoelectric sensors take advantage of this property to measure pressure.

More Pressure Measurement Solutions

The Hydraulic Pressure Transducer is a transducer used to measure pressure in hydraulic systems. It can monitor and control the pressure of the hydraulic system by converting the pressure into electrical signals. It is essential for the safe operation of hydraulic systems. By understanding its working principle and correct use method, you can better utilize its characteristics and improve production efficiency and work safety.

Sino-Inst is a professional Hydraulic Pressure Transducer manufacturer. Our Hydraulic Pressure Transducers are widely used in various industrial hydraulic systems. If you need to purchase Hydraulic Pressure Transducers or have related technical questions, please feel free to contact our sales engineers!

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Pressure Transmitter Installation Guide

How to install the pressure transmitter? This question may be something you need to consider before starting to purchase a pressure transmitter. A clear understanding of the installation requirements and installation methods of pressure transmitters will help in the design and construction of our process systems. And it can better ensure the measurement accuracy of our pressure transmitter.

We, Sino-Inst, are a manufacturer of pressure transmitters. We have provided pressure transmitters and pressure transmitter installation suggestions for process measurement and control in various industries for many years. The installation guide below is a summary of our many years of experience. Hope this can provide you with some help.

Preparation before installation

  1. The situation of measuring medium: Is the medium that needs to be measured gas, steam or liquid? High temperature or extremely low temperature? Whether there is corrosion, etc.
  2. Check the equipment: Because the equipment and design suppliers and models are different. Therefore, it is necessary to determine the transmitter corresponding to each tag number based on the measuring range, design and installation method, and the material required by the process medium.
  3. Determine the installation location: Is it installed on the tank? On the pipeline? Or on the pressure tube?

Various series of pressure transmitters adopt waterproof and dustproof structures and can be installed in any place.

However, it should be considered from the aspects of facilitating daily operation and maintenance, extending service life, and ensuring reliability. The installation location has the following requirements:

  • There is sufficient working space around, and the distance from adjacent objects (in any direction) is greater than 0.5m;
  • There is no serious corrosive gas around;
  • Not subject to surrounding thermal radiation and direct sunlight;
  • To prevent interference with the output due to vibration of the transmitter and pressure-guiding tube (capillary tube), the transmitter should be installed in a vibration-free place.

Selection of Pressure Transmitter Installation location

The installation location is also our pressure measuring point.

  • The selected pressure measuring point can reflect the actual situation of the measured pressure.
  • It should be selected in the pipe section where the measured medium flows in a straight line, and not in the pipeline bends, bifurcations, dead corners or other places where vortices are easy to form.
  • When measuring the pressure of a flowing medium, the pressure point should be perpendicular to the flow direction.
  • When measuring gas, the pressure point should be above the pipe so that there is no liquid in the pressure pipe.
  • When measuring liquid pressure, the pressure point should be at the lower part of the pipe so that there is no gas in the pressure pipe.
  • When the transmitter is installed lower than the pressure pipe, the liquid column pressure between the pressure gauge and the pressure pipe should be subtracted.
  • When measuring steam pressure, a condensate pipe should be installed to prevent high-temperature steam from directly contacting the pressure measuring element.

Precautions for installing pressure transmitter

  • The pressure transmitter should be installed in a place where it is easy to observe and inspect.
  • The installation location should be protected from vibration and high temperature.
  • Avoid installation in corrosive environments.
  • When the measured medium is prone to condensation or freezing, insulation and heating pipelines must be added.
  • A stop valve should be installed between the pressure tapping port and the transmitter, and should be close to the pressure tapping port.
  • Sealing gaskets and polytetrafluoro tape should be installed at the connection of the pressure transmitter. Generally, asbestos paper or aluminum sheets are used when the temperature is lower than 80℃ and 2Mpa. When the temperature and pressure (50MPa) are higher, annealed copper pads or lead pads are used.

How to install the pressure transmitter

There are many ways to install a pressure transmitter, and the following three are currently commonly used.

⑴Pressure transmitter installation on pipe, this installation method is simple and uses less material.

If it is a high-temperature pipe, you can add 1 or 2 circles of conduit to reduce the temperature.
An isolation valve can also be added to facilitate the later disassembly and replacement of the pressure transmitter.

⑵Flange installation, mainly used for liquid level measurement, using the static pressure of the liquid to measure the liquid level.

⑶ Bracket installation (pipe-mounted flat bracket). Most of them adopt this installation method, which is convenient for installation and maintenance. If it is in an open-air location, an instrument box can be used to protect the pressure transmitter from dust and rain. Of course, our pressure transmitter is well protected, with a protection level of IP65. The working environment temperature is -40~+75℃. Resistant to vibration, dust and rain. Maintenance-free for 5 years.

In addition to the above three, there is also an installation method using a pressure tube, which is also very common.

About pressure transmitter tapping point with impulse tubing

A pressure tap generally refers to taking a small portion of fluid (which may be a gas or liquid) from a process and introducing it to a pressure transmitter to measure the pressure of that fluid. This is a way of directing fluid from a real work process to a measuring device so that it can be monitored or analyzed.

In actual operation, in order to ensure the accuracy of measurement and avoid damage to the pressure transmitter due to fluid characteristics (such as high temperature, corrosiveness, etc.), a specific impulse tubing device or isolation mechanism may be used. These devices cool, filter or otherwise treat the fluid to ensure it is suitable for being measured and to ensure the safety and accuracy of the measuring equipment.

The impulse tube is also a commonly used accessory in the installation of differential pressure transmitters.

Pressure transformer installation with impulse tubing

The pressure transmitter is not installed directly on the pipe, but is connected to the connection joint of the pressure transmitter through an impulse tube with a diameter of 14 mm. The pressure transmitter body is installed next to the device.

When welding this pipe with the impulse tube device (actually a 50-75mm metal pipe) installed on the pipe, the welding angle ends up being about 45°. This will not easily cause dust accumulation. In addition, there is a pipe thread on the head of the metal pipe, which can be tightened with a plug to prevent air leakage. It is easy to open when inspecting the air pipe and check whether there is dust accumulation in the air pipe. The instrument air intake pipe is welded to the upper part of the air intake pipe, which will not easily cause dust accumulation.

The impulse tube of the pressure transmitter should be equipped with 4 instrument valves. If the measured pressure is an air pipe with low pressure, the instrument valve on the upper part of the air pipe can be omitted. This valve is generally called a primary valve, but this valve cannot be omitted when measuring high-pressure gas and water. When the pressure transmitter is working, open the valve at the upper part of the gas intake pipe and the valve at the upper part of the tee, which is generally called the secondary door. Close the lowermost valve, generally called the exhaust valve. Slowly open the valve connected to the pressure transmitter to allow the pressure transmitter to pressurize.

Pressure transmitter wiring

At present, pressure transmitters are more commonly used in DCS control systems. The pressure transmitters installed on site are equipped with 4-20mA output and digital communication functions. Connect to the input of the on-site power room via shielded cable.

For wiring instructions of the pressure transmitter, please refer to: Pressure Transducer Wiring Diagram Guide: 2 Wire-3 Wire-4 Wire

More Pressure Measurement Solutions

No matter what type of pressure transmitter you plan to purchase or have purchased, you need to consider the Pressure Transmitter Installation. Compact pressure sensor, explosion-proof pressure transmitter, flange-mounted pressure transmitter, or capacitive pressure transmitter, etc.

We at Sino-Inst are professional pressure transmitter manufacturers. If you plan to install a pressure transmitter or are ready to purchase a pressure transmitter and have any questions about the Pressure Transmitter Installation, please feel free to contact our sales engineers!

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What Is Pressure Transducer Output Signal? and Types

There are four commonly used Pressure Transducer Output Signals: 4-20mA current signal, 0-5V or 0-10V voltage signal, digital signals such as HART and MODBUS, and frequency/pulse signals. When the pressure transmitter is working and connected to the power supply and pressure source, the pressure sensor will produce an output signal proportional to the pressure.

Featured Pressure Transducers

If you are new to the industry, you may need to know the basics about pressure sensors and pressure transmitters:

OK Next, let’s take a detailed look at these four Pressure Transducer Output Signals.

Pressure Transducer Output Signal types

1. Current signal output (for example 4-20mA):

Definition: This signal output method uses a certain range of current to represent the change of the measured physical quantity. For example, 4-20mA means that the minimum and maximum measurements correspond to an output of 4mA and 20mA respectively.

Advantage:
Able to transmit over long distances without being affected by voltage loss.
Has its own fault detection capabilities (for example, output below 4mA can be used for fault detection).
Excellent performance in electromagnetic interference environments.

Best applications: Suitable for long-distance transmission or situations with a lot of electromagnetic interference in industrial environments.

Maximum distance: up to 1000 meters or more.

2. Voltage signal output (such as 0-5V or 0-10V):

Definition: This signal output method represents the size of the measured physical quantity through changing voltage values.

Advantage:
Connections between voltage output devices and devices are relatively simple.
Often easier to understand and measure.

Disadvantages: Long distance transmission may be affected by voltage drops caused by resistors.

Best Applications: In short-distance connections, such as in a laboratory environment or close industrial equipment.

Maximum distance: usually within 15 meters, as long distances may be affected by voltage drops caused by resistors.

3. Digital signal output (such as HART and MODBUS):

Definition: These are digital communication protocols that allow two-way communication between a device and a host computer or other device.

Advantage:
A variety of information other than measured values can be transmitted, such as device status, diagnostic information, etc.
Data transmission is stable and highly reliable.
Ability to remotely configure and diagnose.

Best applications: Suitable for occasions where remote monitoring, diagnosis or configuration is required, or where there are multiple devices in the system that require data exchange.

Maximum distance: HART can reach about 1000 meters; MODBUS can reach about 1200 meters on the RS-485 interface.

4. Frequency/pulse signal output:

Definition: The frequency or number of pulses output is proportional to the measured physical quantity.

Advantage:
Interfaces directly with devices requiring frequency input or pulse counting.
For some systems or devices, it may be easier to integrate.

Disadvantages: Additional transformation or processing may be required in complex systems.

Best Applications: Direct connection to equipment requiring frequency input or pulse counting, such as flow meters or direct connection to certain types of PLCs.

Maximum distance: Since it is usually a digital signal, it can be up to several hundred meters. But the exact distance depends on the signal type and transmission medium.

FAQ

A pressure transmitter is a device that converts a received pressure signal into an electrical signal output. That is to say, the output of the pressure transmitter is a signal representing the measured pressure value. This signal can be a voltage, current, frequency, digital or other type of output.

The output signal of the transducer is a signal that represents the physical quantity it measures (such as pressure, temperature, flow, etc.). The signal can be analog (such as voltage or current) or digital (such as HART, MODBUS).
Here are not just pressure transmitters, but also flow transmitters (that is, flow meters), level transmitters, temperature transmitters, density meters, etc.

The response of a pressure transmitter describes the change in the transmitter output signal when the input pressure changes.

An ideal pressure transmitter will produce an immediate, accurate and linear response to input pressure changes.

Pressure sensors measure pressure by converting the pressure of an object into an electrical signal output. Our naked eyes cannot distinguish the magnitude of physical pressure. So, we need Pressure Transducer Output Signal. Pressure Transducer Output Signal converts invisible signals into signals that we can identify, count, and control. This is more conducive to our industrial process measurement and control.

Sino-Inst is a professional pressure transmitter manufacturer. We produce various pressure transmitters, including more than 50 types of high-frequency dynamic pressure transmitters, ultra-high temperature pressure transmitters, extremely low temperature pressure transmitters, explosion-proof pressure transmitters, etc. Our pressure transmitters can be configured with a variety of common Pressure Transducer Output Signals. They can be configured according to the signals you require.

If you have any questions about the configuration of Pressure Transducer Output Signal, please feel free to contact our sales engineers!

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Optimize Filtration Monitoring with Differential Pressure Sensors

Differential pressure sensors are used to Optimize Filtration Monitoring in different applications.

Ever wonder how your water stays clean or your air pure? It’s the work of top-notch filtration monitoring systems, made efficient by small but vital devices called differential pressure sensors. This blog post will walk you through what these sensors are, their working principle, and their key role in filtration monitoring. We’ll also highlight the tangible benefits they bring to your business. Ready to enhance efficiency and reduce costs? Let’s delve into the world of differential pressure sensors.

Understanding Differential Pressure Sensors

Differential pressure measurement is the difference in pressure between two points in a system. This data is crucial in many applications, filtration Monitoring systems being one of them.

A differential pressure sensor is a special instrument used to measure the pressure difference between two points in a system. It contains important parts like diaphragms, strain gauges, or capacitive elements. These sensors come in different types, such as diaphragm-based, piezoresistive, and capacitive. Each with its own benefits and uses. Unlike regular pressure sensors that measure absolute or gauge pressure, differential pressure sensors specifically concentrate on the pressure difference between two points.

More about: Working Principles Of Differential Pressure Sensors

The Crucial Role of Filtration Monitoring

Filtration is like a superhero in the world of industries. It protects systems by separating the wanted from the unwanted, whether it’s clean water from contaminants, pure air from pollutants, or precious oil from impurities.

Monitoring the process is key. Without proper filtration monitoring, systems could run into issues. Clogged filters might go unnoticed, leading to decreased performance or even system breakdowns. This could result in downtime or costly repairs, a headache no one wants.

Many industries, from water treatment to HVAC, from oil and gas to food and beverage, all rely heavily on filtration processes. Without adequate monitoring, they can’t ensure optimal operations or the quality of their products.

So, how do we prevent these issues? This is where differential pressure sensors become a star player. Read on to discover how these trusty devices help keep your filtration process in check.

Application of Differential Pressure Sensors in Filtration Monitoring

Differential pressure measurement is the difference in pressure between two points in a system.

For filter applications, the upstream side [A] is before the filter [B] and the downstream side [C] is after the filter. Differential pressure sensors can be used to monitor the cleanliness of filters in liquid or gas applications.

Working principle

  1. Upstream pressure (usually line pressure or inlet water pressure) drives the media through the filter. A line was installed before the filter and connected to the high side of the sensor.
  2. Filters remove contaminants from the media.
  3. The downstream or outlet pressure then directs the media through the system with less contaminants than before. A line is installed at the lower end of the sensor to monitor the differential pressure.
  4. When there is no contamination in the filter, the system will measure a differential pressure of 0 PSI. As the filter clogs, the pressure on the downstream side decreases. This results in a greater differential pressure between the high and low sides. When using a differential pressure transducer, the unit provides a linear output signal based on the differential pressure.

Example:

Consider a system where a 100 PSI pump equipped with a filter is used to purify drinking water. The filter should be replaced when the downstream side of the system pressure drops to 80 PSI. In this scenario, the sensor is calibrated with a 100 PSI line pressure and a 20 PSI differential pressure, using a 24VDC power supply and emitting a 4-20mA output signal.

When the system operates with a clean filter, the output signal is at the lower limit of 4mA. However, as the downstream pressure decreases, the output signal will increase. When the downstream pressure reduces to 80 PSI, the sensor’s output signal will reach its full scale of 20mA.

Connected to a controller, this output informs the operator when it’s time to replace the filter. With this set-up, you have a smart, efficient, and effective system ensuring the provision of clean drinking water.

Featured Differential Pressure Sensors

Piezoresistive Differential Pressure Transmitter
Piezoresistive Differential Pressure Transmitter utilizes the piezoresistive effect of semiconductor silicon materials. Realize accurate measurement of differential pressure.
Differential pressure(DP) level transmitter
Differential pressure (DP) level transmitter is a perfect solution for tank level measurement. Flanges, seal diaphragms, capillaries, and DP transmitter are often used to measure liquid levels.
Differential Pressure Gauge
Quickly measure the positive, negative or DP of air or non-corrosive gas. Sino-Inst supplies Differential Pressure Gauges made in China. DWYER 2000 Differential Pressure Gauges, Magnehelic differential pressure gauges are also available.

Benefits of Using Differential Pressure Sensors for Filtration Monitoring

Wondering why you should consider differential pressure sensors for your filtration monitoring needs? Here’s the scoop!

  • Cost Savings: Picture this – you’re changing filters only when necessary, not too soon or too late. That’s efficient use of resources, which translates into savings. Plus, by preventing breakdowns, you avoid costly repairs.
  • Increased Efficiency: By ensuring your filter isn’t clogged, the fluid flows smoothly, and your system works at peak efficiency.
  • Reduced Downtime: With these sensors, you get a heads-up before your filter causes a problem. That means you can schedule maintenance and avoid unplanned downtime.
  • Improved Safety: In some industries, a faulty filtration process can pose a risk to safety. By monitoring pressure differences, you can detect and address issues promptly, keeping your work environment safer.

In a nutshell, differential pressure sensors are a smart investment for any business. They help keep your operations running smoothly, efficiently, and safely, saving you both time and money. So, what are you waiting for? Get started with differential pressure sensors today!

More Measure and Control Solutions

What Is a Doppler Flow Meter?

Doppler Flow Meter is a new type of non-contact ultrasonic flow meter. Installs completely outside the pipe, eliminating the need…

At Sino-Inst, we understand the importance of quality and precision in your industry. With our extensive experience and knowledge, we offer a broad range of pressure sensors, including custom solutions tailored to your specific needs.

Are you ready to unlock the potential of differential pressure sensors in your filtration processes? Don’t hesitate to reach out to our team. We’re here to answer your questions, provide guidance, and help you select the best sensor for your application.

Make the smart choice. Choose Sino-Inst. Let’s take the first step towards improved filtration monitoring today!

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Low Cost Differential Pressure Sensor – Solve Big Problems!

Low cost differential pressure sensor has made a loud impact in the bustling world of technology. These affordable, high-performing devices have emerged as problem solvers across a host of industries. But what are these sensors, and why have they become so critical? Let’s delve into the fascinating world of low cost differential pressure sensors and uncover their significant role.

What is a Differential Pressure Sensor?

A differential pressure sensor acts like the ‘brain’ in various systems, quietly monitoring and guiding their function. Simply put, it measures the difference in pressure between two points within a system. This data can be critical as it helps control different variables, such as flow, level, or speed, making the sensor a vital part of many industrial and commercial applications. Whether in a massive manufacturing plant or in your home’s heating system, these small yet mighty tools are hard at work, ensuring things run smoothly and efficiently.

More about:

Unique Advantages of Low Cost Differential Pressure Sensor

  • High performance price ratio;
  • All stainless steel structure design, small size and light weight, easy to install;
  • Stable and reliable performance;
  • Differential pressure range: 0~10KPa…2.5MPa;
  • Static pressure resistance up to 10MPa;

Technical Parameters

Measuring range0-10KPa…2.5MPa
long-term stability≤±0.2%FS/year;
Comprehensive accuracy≤±0.1%FS, 0.25%FS, 0.5%FS;
static pressure≤10MPa;
ambient temperature-10…+85°C;
Medium temperature-10…+85°C;
Compensation temperature-10…+85°C;
Zero temperature error±0.02%FS/°C (typical value), ±0.05%FS/°C (maximum value);
Sensitivity temperature error±0.02%FS/°C (typical value), ±0.05%FS/°C (maximum value);
static pressure effect±0.05%FS/100KPa;
vibration effectChange ≤ 1% after 3gRMS 30~2000Hz vibration;
shockChange ≤ 1% after 100g, 10ms impact;
life1×108 pressure cycle
Measuring mediumGases or liquids compatible with 316 stainless steel;
Power supply9~24V DC;
signal outputAnalog: 4 … 20 mA; 1 … 5V; 0…5V; digital signal: HART;
Insulation resistance100MΩ, 500V DC;
electrical protectionReverse polarity protection against electromagnetic interference;
Response time≤250 ms;
Degree of protectionPlug type (IP65); Cable type (IP67);
Explosion-proof gradeEx iaⅡCT5
wetted material316L stainless steel
shell material304 stainless steel
process connectionM20*1.5 external thread; G1/2 external thread Please consult for other threads
electrical connectionHessmann plug, aviation plug, straight outlet
weight0.4KG

Low Cost Differential Pressure Sensor – Starts From USD 150.00/pc.

Applications of Low Cost Differential Pressure Sensors

Low cost differential pressure sensors have a surprisingly wide range of applications. Here’s a snapshot of the sectors where they truly shine:

  • HVAC Systems: They monitor and control air flow, ensuring optimal indoor conditions.
  • Healthcare: In critical equipment like ventilators, these sensors help deliver the right air pressure to patients.
  • Automotive Industry: They play a part in monitoring and controlling engine parameters, contributing to safer and more efficient vehicles.
  • Manufacturing and Process Control: With real-time and accurate data, they aid operators in maintaining high-quality outputs and safety standards.

Low-cost yet versatile, these differential pressure sensors have truly found their place in multiple industries.

Industrial Case Studie

Case Study: Process Control in Manufacturing

In a manufacturing setup, accuracy is crucial. Low cost differential pressure sensors play a pivotal role here. By accurately measuring the difference in pressure between two points, they help ensure the manufacturing process runs smoothly. For instance, in a beverage plant, these sensors aid in maintaining the right carbonation levels in drinks, contributing to the perfect fizz that customers love.

Case Study: Differential Pressure Sensors in Water Treatment Plants

Water treatment plants are another sector where these sensors come into play. Here, they measure the pressure differential across filters to identify any potential blockages or inefficiencies. This early detection of issues allows for timely maintenance, ensuring the consistent delivery of clean, safe water.

From carbonated drinks to clean water, low cost differential pressure sensors are small yet mighty tools making a big difference in industrial settings.

Choosing the Right One

Piezoresistive Differential Pressure Transmitter
Piezoresistive Differential Pressure Transmitter utilizes the piezoresistive effect of semiconductor silicon materials. Realize accurate measurement of differential pressure.
Differential pressure(DP) level transmitter
Differential pressure (DP) level transmitter is a perfect solution for tank level measurement. Flanges, seal diaphragms, capillaries, and DP transmitter are often used to measure liquid levels.
Flange Mounted Differential Pressure Transmitter
Flange Mounted Differential Pressure Transmitter is also called single flange DP level transmitter. For liquid, gas or vapor pressure measurement.
Differential Pressure Gauge
Quickly measure the positive, negative or DP of air or non-corrosive gas. Sino-Inst supplies Differential Pressure Gauges made in China. DWYER 2000 Differential Pressure Gauges, Magnehelic differential pressure gauges are also available.

FAQ

The cost of differential pressure sensors varies widely based on their specifications and the manufacturer. On average, you can expect to pay anywhere from $150 to several hundred dollars. For the most accurate pricing, it’s best to contact us.

Siemens is a well-known manufacturer of differential pressure sensors, known for their high-quality products. The pricing of Siemens sensors typically falls in the mid to high-end range.

One example of a differential pressure sensor:

  • Fluid temperature is -70 degrees Celsius.
  • DP transmitter: 0-10V output;
  • With pressure buffer.
  • 1/4″ NPT female process connection;
  • TE’s T4132012041-000 M12 Connector with Pressure
  • Snubber – 1 / 4″ NPT Female;
  • Electrical connection: 5m long open cable provided
  • 1. 0-120 mbar
  • 2. 0-500 mbar

The accuracy of a differential pressure sensor depends on the model and its specifications. However, many sensors on the market offer high accuracy levels, sometimes up to 0.1% of the full scale. It’s essential to check the product specifications or consult with the manufacturer to understand a particular sensor’s accuracy.

More Pressure Measurement Solutions

In the realm of pressure sensors, Sino-Inst has carved its own niche as an experienced manufacturer and supplier.

We’ve been bridging the gap between quality and affordability, offering our customers reliable, low-cost differential pressure sensors that meet a variety of needs. Whether you’re in HVAC, healthcare, manufacturing, or any industry that requires precise pressure monitoring, we’ve got you covered. Plus, we understand that each customer has unique requirements, so we provide customization options.

Reach out to us at Sino-Inst today, and let’s create solutions that drive your business forward. Because with Sino-Inst, quality pressure monitoring is always within your reach!

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Oxygen Cleaning Pressure Sensor – No Oil, No Corrosion, No Impurities

Oxygen cleaning process Strict cleaning to ensure that the sensor is clean and free of oil, corrosion, scaling, particles and other impurities. Oxygen cleaning pressure sensor completely solves the potential risk of oxygen combustion or explosion caused by sensor oil contamination during oxygen pressure measurement.
Sino-Inst manufactures pressure sensors and transmitters that are cleaned for use with oxygen.

What is oxygen cleaning?

Oxygen cleaning is like giving a deep spring clean to equipment that comes in contact with oxygen. Imagine you’re tidying up your room. You’d clean all the visible dirt, right? But what about the tiny dust particles hiding in corners or under your bed? With a regular clean, you might miss them. But with a ‘deep clean,’ you’d make sure to get rid of them too.

Oxygen cleaning is this ‘deep clean’ for equipment. It makes sure to remove all tiny bits of dirt, oil, and other stuff that could cause a big problem if they catch fire in an oxygen-rich environment. So, by doing this deep clean, we’re making the equipment super safe to use with oxygen!

Why is Oxygen Cleaning important?

Imagine you’re making a small campfire. You add some sticks and leaves, and you have a nice little fire going. Now, imagine you pour a bucket of gasoline on it. Boom! You now have a massive, raging fire that’s hard to control. This is similar to what can happen in oxygen-rich environments. Oxygen itself isn’t flammable, but it makes other things burn really quickly and intensely.

Now, picture tiny particles of oil, grease, or dirt on your equipment. If these particles caught fire in an oxygen-rich environment, it could lead to a serious accident or even an explosion. That’s why we need to make sure our equipment is super clean before we use it with oxygen.

In other words, oxygen cleaning is crucial because it removes these tiny particles and makes our equipment safer. So, it’s not just about cleanliness—it’s about safety, reliability, and peace of mind. That’s why oxygen cleaning is not just important, it’s essential!

Oxygen Cleaning pressure sensors

Many of Sino-Inst’s pressure sensors use a one-piece stainless steel pressure sensing unit, which eliminates the risk of oxygen contaminating the silicone oil and the risk of ceramic diaphragm sensor O-ring rupture.

316L pressure transducers are available for high pressure oxygen applications for optimum media compatibility. Products can be designed for use in hazardous locations, including explosion-proof and intrinsically safe areas, and can be used in process plants and hospitals.

SI-520 Digital Pressure Sensor
Digital Pressure Sensor is particularly suitable for use in computer control systems. RS485 half-duplex working mode.
SI-703 Flush diaphragm pressure sensor
Flush membrane / diaphragm structure, anti-blocking design. Pressure measurement of viscous media.
SI-702 High Pressure Sensor
High pressure sensor is pressure transmitter designed for high pressure measure&control. 0 ~ 40MPa… 600MPa. M20 × 1.5, G1 / 2 (others are customized according to requirements)
SI-702S Ultra-High Pressure Senors
Pressure sensor for Ultra high pressure applications. Ultra high pressures up to 15,00MPa. 0-2000MPa to 0-7000MPa (customized).Ball head M20 × 1.5, cone head M20 × 1.5.
SI-350 Sanitary Pressure Transmitter
Sanitary Pressure Transmitter, also called tri clamp pressure transmitter,
is the pressure transducer with the flush diaphragm (flat membrane) as the pressure sensor.
SI-300 Pressure Transducer 4-20mA/Voltage
The 4-20mA/ Voltage Pressure Transducer,
also called pressure transmitter 4-20mA,
is a pressure sensor with4-20ma/Voltage output.
SI-512H High Temperature Pressure Sensor
High Temperature Pressure Sensor for pressure measurement of high temperature gas or liquid. Such as steam pressure. High temperature up to 800 ℃.
Absolute Pressure Transmitter
Absolute pressure transmitter with 4-20mA output for measuring pressure with absolute type reference. Absolute pressure (AP) transmitter is a measure of the ideal (complete) vacuum pressure.
Hydrostatic pressure transmitter
Hydrostatic pressure transmitter is used for fluid hydrostatic pressure measurement. With working static pressure up to 32Mpa, for liquid, gas or steam .

Oxygen Cleaning Pressure Sensor Application Industry

Oxygen cleaning of pressure sensors is essential in various industries where safety and precision are crucial. Let’s look at some of these:

  • Aerospace: In the aerospace industry, oxygen systems are often used for life support in spacecraft and airplanes. Any equipment, including pressure sensors, used in these systems must be thoroughly cleaned to ensure safety and reliability.
  • Medical: Medical devices, particularly those related to oxygen therapy and anesthesia, often require oxygen-cleaned pressure sensors to prevent any risk of combustion and ensure patient safety.
  • Oil and Gas: The oil and gas industry frequently uses oxygen for various processes, including refining and production. Oxygen-cleaned pressure sensors are necessary to ensure these processes are conducted safely and efficiently.
  • Chemical Processing: In chemical processing plants, oxygen is often used in various processes, and any contaminants could potentially cause harmful reactions. Therefore, pressure sensors used in these environments are typically oxygen-cleaned.
  • Scuba Diving Equipment: Scuba diving equipment, such as rebreathers, often uses pressure sensors that need to be oxygen-cleaned. This ensures the safety of the diver by preventing combustion under the sea.
  • Firefighting Equipment: Oxygen is often used in breathing apparatus for firefighters. The pressure sensors used in this equipment need to be oxygen-cleaned to ensure the safety of the firefighters.

Remember, oxygen cleaning isn’t just about cleanliness—it’s about safety and efficiency in operations. It’s an essential step that allows various industries to perform their tasks confidently and without risk.

FAQ

Oxygen cleaning is a process that thoroughly cleans components that come into contact with oxygen. It removes contaminants such as grease, oil, dust, and other particles to prevent combustion in oxygen-rich environments.

Various methods are used for oxygen cleaning, including ultrasonic cleaning, steam cleaning, chemical cleaning, and more. The choice of method depends on the type of component and its contamination levels.

Oxygen cleaning is essential for safety. In oxygen-rich environments, even tiny particles can catch fire and cause damage. Oxygen cleaning helps to remove these particles and prevent potential hazards.

The choice of solvents depends on the type of contaminants present. Commonly used solvents include alcohol, acetone, and various commercial oxygen-cleaning agents. All cleaning agents must be thoroughly removed after cleaning to avoid further contamination.

More Pressure Measurement Solutions

In conclusion, oxygen cleaning is an essential process that ensures the safety and efficiency of pressure sensors in various oxygen-rich environments. This process, like a deep spring clean for your equipment, removes all the hidden contaminants that could cause serious problems down the line. But remember, just like any specialized process, oxygen cleaning requires expertise and precision.

That’s where we come in. At Sino-Inst, we pride ourselves on our rich experience and our dedication to quality. As a leading manufacturer and supplier, we’ve spent years perfecting our oxygen cleaning process for pressure sensors. We understand how vital this process is for your operations, and we don’t take it lightly.

Let Sino-Inst take care of your pressure sensor needs. Contact us now!

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