Innovative Methods for Fluid Level Measurement

Fluid level measurement is a crucial, yet often overlooked, process spanning various industries, from manufacturing to oil and gas. Methods for measuring fluid levels have come a long way, evolving from basic sight glass to advanced techniques like ultrasonic or radar measurement. Each method has its merits, and the choice often hinges on the specific scenario. Join us as we delve into these fascinating techniques, their advantages and shortcomings, in our comprehensive guide to fluid level measurement.

Innovative Methods for Fluid Level Measurement 1

The Basics of Fluid Level Measurement

Let’s take a step back and delve into what fluid level measurement truly entails. The fluid can be anything – water in a reservoir, oil in a barrel, or a beverage in a production line. And the ‘tool’ we’re referring to? That’s the method of measurement.

Selecting the right method isn’t a random choice but requires careful consideration of both the fluid (target medium) and the container (vessel). Why? Because different fluids and containers can impact the measurement’s accuracy. Think about it this way – measuring the level of water in a glass is a much simpler task than assessing oil quantity in a massive industrial tank. The right method ensures the measurements are not only accurate but precise.

Now, let’s briefly introduce the main methods used for this purpose. There are six principal techniques, each boasting its unique strengths and limitations:

  • Continuous Float Level Transmitters: Utilizes a float that moves with the fluid level, providing continuous measurement.
  • Differential Pressure Transmitters: Measures the pressure difference at two points in the fluid, correlating it with the fluid level.
  • Load Cells: Uses force measurement to deduce the fluid level.
  • Radar Level Transmitters: Leverages radio wave technology to determine the fluid’s distance from the sensor, thus the fluid level.
  • Radio Frequency (RF) Capacitive Level Transmitters: Employs the change in capacitance caused by the change in fluid level to provide measurement.
  • Ultrasonic Level Transmitter: Sends ultrasonic pulses towards the fluid surface and calculates the fluid level based on the time it takes for the pulses to return.

With the basics covered, let’s delve deeper into these methods, their applications, and how to decide which one is the ‘perfect tool’ for your ‘task’. Stay tuned!

Traditional Methods of Fluid Level Measurement

Before we journey into the modern age of fluid level measurement, it’s worth taking a moment to appreciate the tried-and-true traditional methods that have served various industries for decades. Two of the most common methods include sight glass and hydrostatic pressure measurements.

Sight Glass Measurement

The sight glass method is a simple yet effective method for fluid level measurement. Picture a transparent tube attached to a tank, with the fluid level in the tube reflecting the fluid level in the tank. By observing the fluid in the sight glass, operators can visually estimate the fluid level in the tank.

The pros of this method are its simplicity and directness. There’s no need for complex calculations or advanced technology, making it both reliable and cost-effective. It’s especially useful for tanks containing multiple liquids of different densities, as the distinct separation layers can be easily seen.

However, the sight glass method also has its cons. Its simplicity can be a limitation in situations where precise measurement is necessary. Furthermore, it can be challenging to use in high-pressure tanks or with opaque or highly viscous fluids. Also, the physical wear and tear on the sight glass can lead to reading inaccuracies over time.

Hydrostatic Pressure Measurement

Hydrostatic pressure measurement operates on the principle that the pressure at any point in a fluid is directly proportional to its height. Thus, by measuring the pressure at the bottom of a tank, we can calculate the fluid’s height.

One of the key advantages of this method is its versatility. It can measure fluid levels in both open and closed tanks and handle various fluid types, from water to oil. Additionally, it offers consistent readings and can handle extreme temperatures and pressures.

Nevertheless, the hydrostatic method is not without its drawbacks. Changes in the fluid density can affect the accuracy of readings. Moreover, it requires regular maintenance and calibration to ensure accurate measurements, especially when dealing with corrosive or high-temperature fluids.

These traditional methods have laid a strong foundation for fluid level measurement. However, as with any technology, advancements were inevitable and necessary. Next, we’ll look at more sophisticated methods that leverage technological progress to improve accuracy and versatility in fluid level measurement. Stay with us!

Advanced Techniques in Fluid Level Measurement

Technological advancements have gifted the world of fluid level measurement with high-precision tools like ultrasonic sensors, radar measurement devices, and capacitive level transmitters. These tools elevate our ability to track fluid levels accurately and efficiently. Let’s learn more about them.

Ultrasonic Level Measurement

Ultrasonic level measurement capitalizes on sound wave technology. An ultrasonic sensor, located at the top of a tank, sends sound waves downward. When these waves hit the fluid surface, they bounce back to the sensor. The sensor then calculates the time taken for this round trip, which directly relates to the fluid level.

Pros: Ultrasonic sensors are non-contact devices, making them perfect for hazardous or corrosive fluids. These sensors are highly accurate and work well under various environmental conditions.

Cons: However, factors like a foamy fluid surface, intense turbulence, or heavy vapors can hamper the accuracy of ultrasonic measurements. Also, ultrasonic sensors are generally more expensive than traditional measurement methods.

Radar Level Measurement

Radar level measurement also uses the principle of echo, but instead of sound waves, it employs radio waves. These waves are released by a radar sensor, bounce off the fluid surface, and return to the sensor. The duration of this round trip helps calculate the fluid level.

Pros: Radar sensors are extremely accurate and can operate under a wide range of temperatures and pressures. They offer non-contact measurement, which is advantageous when dealing with dangerous or corrosive fluids.

Cons: While highly reliable, radar sensors are complex and more costly to install and maintain. They may also encounter difficulties in tanks with heavy internal structures due to signal interference.

Capacitive Level Measurement

Capacitive level measurement works by detecting changes in an electric field. A probe inserted into a tank forms one plate of a capacitor, with the tank wall (or a reference probe) serving as the other plate. As the fluid level changes, the dielectric constant changes, leading to a change in capacitance which can be measured and related to the fluid level.

Pros: Capacitive level transmitters are versatile, able to measure the levels of a wide range of fluids, including those that are corrosive, viscous, or have a low dielectric constant. They also function well in high-pressure or high-temperature environments.

Cons: However, they can be influenced by buildup on the probe or changes in the fluid’s dielectric constant. They also require regular calibration for maintaining their accuracy.

With these advanced techniques at our disposal, the landscape of fluid level measurement has broadened, offering more precision and flexibility than ever before. However, choosing the right method always depends on your specific requirements. In the following section, we’ll help guide you in making this choice. Stay tuned!

Choosing the Right Method for Fluid Level Measurement

In the world of fluid level measurement, some factors will influence the selection.

Type of Fluid: Different fluids have different properties that can affect the measurement accuracy. For instance, ultrasonic sensors may not be the best choice for highly viscous or foamy fluids due to signal dispersion. For such fluids, capacitive level transmitters might offer more reliable results.

Size of the Container: The size and shape of the container can also influence the choice of measurement method. For example, sight glass measurement might be perfect for small tanks, while radar or ultrasonic measurements could be better suited for large industrial tanks.

Environmental Conditions: The measurement method must also take into account environmental conditions. If the tank is in a high-temperature or high-pressure environment, robust methods like hydrostatic pressure or capacitive level measurement would be advantageous.

Industry Requirements: Lastly, industry-specific needs play a role. For instance, in the food and beverage industry, non-contact methods are often preferred to prevent contamination. While in the oil and gas industry, methods capable of withstanding corrosive materials are necessary.

More Level Measurement Solutions

Radar Liquid Level Sensors

Radar liquid level sensors are special tools that use radio waves to measure how much liquid is in a tank…

In conclusion, there’s no one-size-fits-all solution in fluid level measurement. It’s a careful selection process that requires a deep understanding of the application, environment, and industry needs. By considering these factors and weighing the pros and cons of each method, you can make an informed decision that ensures accurate, reliable, and efficient fluid level measurement.

The world of fluid level measurement is both vast and varied. From traditional methods like sight glass and hydrostatic pressure to modern techniques employing ultrasonic, radar, and capacitive technologies, the tools at our disposal are as diverse as they are dynamic.

With Sino-Inst by your side, you get more than just a product – you get a commitment to quality, a dedication to precision, and most importantly, a partner who understands and respects the importance of your work.

Ready to take the next step in your fluid level measurement journey? Get in touch with us today. Let’s explore the possibilities together and unlock the full potential of fluid level measurement for your operations.

Contact Sino-Inst: Your trusted partner in fluid level measurement.

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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.


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.
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.

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

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.


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.


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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The Role of Dew Point Meter for Compressed Air Systems

Dew Point Meter for Compressed Air Systems are crucial for efficient, safe industrial operations. These devices keep moisture levels in check, safeguarding your equipment and boosting productivity. Here, we’ll explore the ‘whys’ and ‘hows’ of dew point meters and introduce our state-of-the-art product – designed with industry needs in mind.
Sino-Inst offers a range of dew point meters for compressed air and gas systems.

Compressed air systems are key in industries for cooling, heating, and running tools. During this process, water vapor can form. It’s okay in small amounts, but too much can harm equipment and reduce product quality. So, monitoring the dew point, or the temperature where water vapor turns into liquid, becomes really important.

Featured Dew Point Meter for Compressed Air

What is the dew point of a compressed air system?

Air compressor system dew point is the temperature at which water vapor condenses to a liquid state at the same rate as evaporation. At this temperature, compressed air is completely saturated and can no longer hold water vapor. For industrial operators using compressed air systems for manufacturing, continuous monitoring of dew point is essential to prevent instrument damage and minimize process contamination.

Is dew point measured in degrees?

Use a dew point transmitter to measure the dew point temperature of compressed air in degrees Fahrenheit. For most systems, the dew point temperature of the air is maintained in the range of 50°F to 94°F. At this temperature, water suspended in the air can settle and begin to collect on compressor components.

If read accurately, a dew point sensor will allow operators to implement different methods of water removal and maintain the integrity of their machinery.

Why is dew point important in compressed air applications?

Maintaining moisture levels is critical to maintaining the functionality of sensitive industrial equipment. If left unchecked, moisture precipitated from compressed air at its dew point can cause mechanical corrosion of metals. This can lead to costly system failures and downtime for maintenance.

Additionally, excess moisture in the compressed air supplied to industrial processes can adversely affect product quality. Accumulated water vapor can transfer impurities such as dust and bacteria into sensitive food and pharmaceutical manufacturing processes. As a result, its output is unsafe and cannot be safely eaten.

The bad effects of moisture damage to an air compressor system is why all operators must rigorously monitor the water saturation in their air systems.

The harm caused by water in compressed air is mainly manifested in:

  • It will take away the lubricating oil on the pneumatic equipment, resulting in reduced efficiency or even damage to the equipment;
  • It will cause the wear of the valve in the pipeline, resulting in the failure or misoperation of the pneumatic control equipment;
  • Corrosion of pipelines and equipment;
  • If water freezes at the low point of the pipeline, the pipeline is still in danger of bursting;
  • If the compressed air used for spraying contains water mist, it will affect the adhesion of the paint on the workpiece, resulting in failure of the paint;
  • It will cause risks such as internal corrosion or blockage of industrial equipment and machinery, reduce the smoothness of the inner surface of the pipeline, and cause pressure loss;

Therefore, to avoid condensation due to high moisture content in the compressed air, the compressed air must be dried to a dew point below the temperature of the coldest surface anywhere in the gas piping system.

Dew point and pressure relationship

There is a clear link between the dew point at which compressed air reaches saturation and the pressure at which it is delivered. As with any gas, an increase in pressure results in a corresponding increase in its dew point. A series of calculations and conversions are done manually or using software that can accurately predict the air dew point and help the operator develop an appropriate dehumidification protocol. The handheld temperature and humidity meter can automatically convert the detected temperature and humidity data into a dew point value, which is convenient for real-time viewing.

How is dew point different from pressure dew point?

In practice, the terms “dew point” and “pressure dew point” are often used interchangeably. However, this substitution is not accurate.

The dew point is the temperature at which air becomes saturated at atmospheric pressure.
Whereas pressure dew point is defined as the dew point of a gas measured at a pressure above normal atmospheric pressure.

Dew Point Meter for Compressed air range selection

For most air compressors, the type of dryer used determines the dew point range of its dew point meter. Common compressed air dryers include adsorption and freeze drying.

Freeze drying is a technology that uses the principle of sublimation to dry. The water dew point of the freeze dryer is generally around -20°C.

Adsorption drying is dehydration and drying by using the adsorbent’s selective adsorption of water vapor in compressed air. The dew point of the adsorption dryer is -60°C to -70°C or below.

Therefore, the range of the freeze-drying dew point meter is usually -60°C-60°C, and the range of the adsorption type dew point meter is -80°C-20°C, or -100°C-20°C.


We use special tools called dew point sensors to measure the dew point of compressed air. These sensors give us a reading in degrees Fahrenheit, telling us the temperature at which water vapor in the compressed air will condense into liquid.

The dew point limit for compressed air usually falls between 50°F and 94°F. However, the exact limit can vary based on the requirements of your specific system or process. The goal is to keep moisture from forming on your compressor parts and to maintain product quality.

The air compressor dew point is the temperature at which water vapor in compressed air will start to condense into liquid form. It’s like the tipping point where the air is fully saturated and can’t hold any more moisture.

The best dew point for instrument air really depends on your system and needs. However, a general guideline is to aim for a dew point that’s lower than the lowest temperature your compressed air system will be exposed to. This prevents moisture from forming and causing potential damage to your equipment.

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In conclusion, understanding and managing the dew point in your compressed air system is crucial to ensuring the longevity of your machinery and maintaining high-quality production. Our “Dew Point Meter for Compressed Air” offers a precise, easy-to-use solution for monitoring this essential parameter in your operation.

Don’t leave the health of your machinery and the quality of your products to chance. Equip your operations with our advanced Dew Point Meter for Compressed Air today.

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Portable Dew Point Meter

Portable dew point meter is also called Handheld Dewpoint Meter. Portable dew point meter is a multifunctional digital temperature and humidity meter. Portable dew point meter is powered by a 9V battery and uses an external high-precision probe. It has the functions of measuring humidity, temperature, dew point temperature, and wet bulb temperature. It is an ideal choice for temperature and humidity measurement in laboratories, industries, and engineering.

Features of Portable Dew Point Meter

  • The product uses a 316L stainless steel probe shell. The sensor is well protected, and the probe part can withstand a certain degree of chemical corrosion.
  • With IP66 waterproof and dustproof rating. Provides long-term accuracy in harsh environments
  • Using high-precision temperature and humidity sensor probes, the readings are stable and accurate;
  • Large-screen LCD display is easy to read;
  • Measurement data is calculated every 10 milliseconds, responsive;
  • Ambient temperature, dew point temperature and wet bulb temperature can be measured simultaneously;
  • Can store 99 data;
  • The temperature unit °C, °F can be switched;
  • Maximum value, minimum value measurement function;
  • Backlight display, can also be used normally in dark environments;
  • Ultra-low power consumption, a 6LR61 9V alkaline battery can be used for 300 hours;
  • An external 9V DC power supply can be connected to meet long-term measurement needs;
  • Data logging and USB interface;
  • The data hold function freezes the current reading;
  • Reserve the Internet of Things ioT function;
  • 20 minutes no operation automatic shutdown;

Technical Parameters

Probe typeRHT35
Sensor probe range
Ambient temperature
Range-30 to 80°C (-22 to 176F) (probe only)
Sampling Rate1 time per second
Relative humidity
Response timeLess than 10S (90% at 25°C, wind speed 1m/s)
Dew point temperature
Dew point temperature range60~60℃(-76~140°F)
Wet bulb temperature
Wet bulb temperature range-20~60℃(-4~140°F)
Internal storage99 groups (key storage, built-in memory)
Power supplyA standard 9V6LR61 or 6F22 battery
Battery LifeAbout 300 hours (use 6LR619V alkaline battery)
Number of records32000 records (recorder function)
Operating environment0~40°C (32~104°F),<80%RH non-condensing
Storage environment10~60°C (14~140°F), <80%RH non-condensing
Weight and DimensionsAbout 200g (including battery), 215mm*58mm*33mm
Standards and CertificationsCE certification

Portable Dew Point Meter Application

  • HVAC Systems: This device is essential for measuring the moisture content within HVAC systems. It ensures optimized performance and prevents issues like mold growth and air quality deterioration caused by excess humidity.
  • Agricultural Automation: The Portable Dew Point Meter measures the humidity levels in fields and greenhouses, aiding in the optimal growth of crops by preventing diseases and promoting yield enhancement.
  • Food and Chemical Production: This device measures the moisture content in various stages of food and chemical production. It ensures the quality and safety of products by maintaining the right humidity levels and preventing spoilage due to moisture imbalance.
  • Large Equipment Monitoring: The meter is utilized to measure and monitor the humidity inside large machinery and equipment, preventing damage and malfunction caused by humidity fluctuations.
  • Laboratory Use: It measures the moisture content in laboratory environments, ensuring precise humidity control for experiments and research where specific atmospheric conditions are required.
  • Chemical Plants: Despite exposure to corrosive chemicals and harsh conditions, the meter measures humidity accurately. This helps maintain safe operations and product quality within chemical plants.
  • Tobacco Industry: The meter is integral for measuring the moisture content during the tobacco curing process. This ensures the quality of the final product by maintaining optimal curing conditions.
  • Environment Monitoring: It is used on-site to measure and monitor humidity in different environments for climatology and meteorology studies, contributing valuable data for environmental research.
  • Pharmaceutical Industry: The Portable Dew Point Meter measures the moisture content in various pharmaceutical products, helping to ensure their efficacy, stability, and safety by preventing moisture-related quality degradation.
  • Art and Museum Conservation: This device is crucial for measuring the moisture levels in galleries and museums, aiding in the preservation of artworks and artifacts by preventing damage from excessive humidity.


Absolutely! Our Portable Dew Point Meter is designed specifically to measure the dew point accurately. It’s a reliable and convenient tool, ideal for both professionals and individuals who need precise humidity measurements.

Our Portable Dew Point Meter offers an exceptional balance of high quality and cost-effectiveness. The price may vary based on the specific model and additional features. Please visit our product page or contact our sales team for the most accurate and up-to-date pricing information.

Measuring dew point at home is straightforward with our Portable Dew Point Meter. Simply switch on the device, place the probe in the environment you want to measure, and the device will display the dew point temperature on its high-definition screen. The device’s user-friendly interface makes it easy to use, even for beginners.

Our Portable Dew Point Meter offers a comprehensive range that covers the needs of various industries and applications. The specific range may depend on the model you choose. For the most precise information, we recommend checking the product specifications on our website or contacting our customer service team.

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As you explore the world of dew point measurement, remember that we, at Sino-Inst, are not just a supplier; we are an experienced manufacturer with a track record of excellence. Our Portable Dew Point Meter is a testament to our commitment to delivering top-notch quality, innovation, and practical solutions to our valued customers across various industries.

So why wait? Experience the precision, convenience, and reliability of our Portable Dew Point Meter today. Reach out to our dedicated team to discuss your needs and let us show you why Sino-Inst is the trusted choice for humidity measurement solutions.

Contact us today to get started.

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More than Just Compressed Air! What Gases Can the Dew Point Meter Detect?

Dew point meters play an integral role in measuring trace moisture content in high-purity gases and mixed gases. Such as the concentration of water vapor in the air. These devices are commonly used to monitor gases like hydrogen, sulfur hexafluoride, argon, helium, oxygen, nitrogen, nitrous oxide, carbon dioxide, acetylene, neon, krypton, xenon, and compressed air.

Featured Dew Point Meters

What Gases Can the Dew Point Meter Detect?

Here are some common applications of dew point meters for various gases:

Hydrogen (H2):

In the energy and chemical industry, once hydrogen is produced and purified, it is necessary to detect trace moisture dew point to meet national standards for pure or high-purity hydrogen.

In the power industry, hydrogen is often used as a heat-conducting cooling gas for high voltage and ultra-high voltage generators. Hence the need to ensure its purity by monitoring its moisture content.

Sulfur Hexafluoride (SF6):

This gas is often used as an insulating and arc extinguishing medium, enabling significant downsizing of substations.

To ensure safety, the trace moisture dew point in the highly pure SF6 gas needs to be measured.

Argon (Ar):

Often used as a protective gas in welding due to its non-combustible nature, Argon effectively isolates oxygen in the air, preventing oxidation of welded parts.

In the electronics industry, pure Argon is used as a protective gas in silicon crystal production to extend the lifespan of the monocrystal, making moisture detection crucial.

Helium (He):

In the telecommunications industry, pure helium is often used in the production process of waveguide tubes for microwave communication antennas or radar cables to reduce energy loss.

Therefore, it is necessary to check the moisture dew point in helium.

Carbon Dioxide (CO2):

During the operation of gas-cooled nuclear reactors, high-purity CO2 is used to promptly remove heat produced by nuclear fission.

To prevent moisture in CO2 from corroding equipment, it should be regularly monitored.

Nitrogen (N2):

To prevent oxygen from affecting equipment, high-purity nitrogen is usually injected into equipment, containers, pipelines, etc. As water vapor can cause corrosion, monitoring its presence is vitally important.

Nitrous Oxide (N2O):

Also known as laughing gas, N2O is commonly used in the production of integrated circuits, microelectronics, LCDs, photovoltaics, LEDs, etc.

It is also used as an anesthetic in medicine, making its purity crucial, which can be ensured by moisture detection.

Acetylene (C2H2):

A fundamental raw material in the production of synthetic fibers, benzene, acetaldehyde, synthetic rubber, and acetic acid, Acetylene is also used for welding and cutting metals.

Monitoring its moisture dew point is necessary to maintain production efficiency, quality, and the temperature of oxyacetylene flames.

In conclusion, dew point meters play a vital role in moisture detection in nearly all gases, ensuring their purity and safety in various applications.

More About Dew Point Measurement

Let’s go over some dew point meter basics.

The dew point temperature (commonly called “dew point”) is the temperature at which water vapor in any gas at constant pressure begins to condense into liquid water at the rate at which it evaporates.

If the air temperature is at or below the dew point, condensation occurs, meaning that water vapor changes from a gaseous state to a liquid state. Condensation will appear as dewdrops on surfaces and may also appear as clouds or fog suspended in the air.

When the air temperature is equal to the dew point temperature, the air is at saturation point and the relative humidity is 100%. The greater the difference between this air temperature and dew point, the lower is the relative humidity.

The dew point temperature, a function of air temperature and relative humidity, is the temperature at which a volume of air must be cooled to reach saturation.

The dew point temperature indicates how much the surface of the air in a particular habitat must cool in order for the water condensation process to begin.
The dew point temperature mainly depends on:
Ambient Relative Humidity (RH)
and ambient temperature (T)

Dew point measurement techniques are generally more expensive than relatively more accurate humidity measurement techniques at low dew points. Dew point sensor response time is usually faster than relative humidity sensor response time.

In some cases, the dew point sensor may take several hours to stabilize, where the RH sensor may only take a moment. Some dew point sensors are highly sensitive to contamination in dirty process air, leading to frequent calibration and sensor maintenance.

Won’t. The dew point will not drop below the saturation point as the ambient temperature changes. If the ambient temperature is at or below the dew point temperature in an enclosed environment, the dew point will change as water vapor is removed from the air.

A common misconception is that changing temperature affects dew point.

It is important to remember that the dew point will become relatively dry independently of the difference between the dew point and the ambient temperature as the temperature rises.

That’s why the environment kept under vacuum is usually very dry.

This is a common misconception, both true and false. The wet bulb temperature is equal to the point temperature at which the dewy air is saturated.

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In conclusion, understanding the intricacies of different gases and their dew point measurements is essential. And there’s no one better equipped to help you than Sino-Inst. With years of experience under our belt, we are seasoned manufacturers and suppliers in this field. Whether you’re looking for standard equipment or need customized solutions, we’re ready to meet your requirements. Don’t wait, seize the opportunity to enhance your operations with our top-notch services and products. Contact us today to learn more about how we can assist you in your ventures!

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Top 1 Guide to Dew Point Measurement

Dew point measurement, a simple concept that carries immense weight. Dew point, in layman’s terms, is the temperature at which the air can no longer hold all its water vapor and starts condensing – forming dew. Sounds simple, right? Yet, its proper measurement can make or break processes in industries ranging from HVAC to pharmaceuticals.

Are you curious about how a straightforward concept like dew point could have such significant implications? Stick around. This guide will unravel the magic behind dew point measurement and show how understanding it could be the key to unlocking a new level of efficiency and quality in your industry operations. Be ready for an insightful journey into the world of dew point measurement!

What is Dew Point?

Have you ever noticed water droplets forming on the outside of a cold glass of lemonade on a hot summer day? This phenomenon is a simple and everyday example of dew point. The dew point is the temperature at which air becomes saturated with water vapor, after which the excess water vapor turns into liquid droplets – the dew.

So, The Dew Point is the lowest temperature that allows water vapour to remain in a gas without condensing to a liquid state. As the air or gas temperature drops, its ability to absorb water vapour drops until it becomes completely saturated and below this dew point temperature, water droplets will start to form.

But how do we measure this dew point? That’s where the marvel of technology comes into play with devices called dew point meters. They measure the air’s moisture content and hence, the dew point temperature.

Two commonly used types are chilled mirror and capacitive sensors. A chilled mirror dew point meter is like watching the outside of your cold glass of lemonade. It cools a mirror inside the device until dew forms on it. The temperature at which the dew forms is the dew point.

Alternatively, a capacitive sensor is more like a sponge. It measures changes in electrical resistance or capacitance caused by condensation of the water vapor, determining the dew point.

Though it might sound technical, understanding dew point measurement isn’t rocket science. Think of it as the key to unlocking greater efficiency in your industry operations. Keep reading to discover why dew point measurement is so important!

Why is Dew Point Measurement Needed?

If we’ve sparked your curiosity about dew point measurement, you might be wondering, “Why do I need to measure the dew point?” Well, buckle up because we’re about to embark on an eye-opening journey into its importance across various sectors.

To begin, let’s step into the world of heating, ventilation, and air conditioning (HVAC).

Here, maintaining comfortable indoor conditions is paramount. The dew point plays a crucial role in ensuring just that. It helps strike the right balance of moisture in the air, avoiding conditions that are too dry or too humid, which could lead to discomfort, or worse, mold growth. Therefore, knowing the dew point is like having a roadmap to HVAC system efficiency and indoor air quality.

Now, let’s switch gears and move to the pharmaceutical and food industries.

Here, moisture control is critical. Whether it’s maintaining the efficacy of drugs or preventing bacterial growth in food, the dew point measurement is vital. It’s like a trusted guardian, ensuring product quality and safety.

In the realm of industrial painting and coating, dew point measurement takes center stage again.

The surface temperature of the material being painted should be above the dew point. If not, the moisture could interfere with the paint’s adhesion, compromising the coating’s integrity and lifespan. Hence, dew point measurement here is the key to unlocking quality and durability.

Finally, in industries where compressed air systems are used, such as manufacturing and power generation, dew point measurement is vital.

Excess moisture in these systems can lead to rust and increased wear and tear, hampering equipment efficiency and safety.

In conclusion, the humble dew point measurement plays an indispensable role across various sectors. Its significance in enhancing process efficiency, ensuring product quality, and safeguarding operations cannot be overstated. So, isn’t it time we paid more attention to dew point measurement in our operations? Stay with us as we dive deeper into this fascinating topic!

Featured Dew Point Sensors

The Science Behind Dew Point Meters

Dew point meters are nifty devices that help us understand the moisture level in the air. Let’s break down how the two most common types, chilled mirror and capacitive dew point meters, work:

Chilled Mirror Dew Point Meters:

  • These devices work like a cold drink on a hot day. You know how water droplets form on the outside of your glass? That’s what happens inside these meters.
  • They cool a mirror surface inside until water starts to condense on it.
  • The temperature when the water forms is the dew point. Easy, right?
  • These meters are super accurate and great for uses where precision is important, like in labs.

Resistive Dew Point Meters:

Compared with the capacitive dew point meter, the sensor part is replaced by a resistive sensor, and its sensitive material is based on the polymer solution of quaternary ammonium salt. This functional group is reacted with the resin polymer. It can produce a three-dimensional thermosetting resin with good stability.

The rationale is that a change in relative humidity can cause a change in the resistance between the cathode and anode. Relative humidity and dew point temperature are determined by measuring the change in conductivity of a resistive sensor.

The advantages of resistive dew point meter are small temperature coefficient, low power consumption and low cost.

Its disadvantage is that in long-term use, regular calibration and maintenance are required, and it is not suitable for environments where some pollutants exist, and it is more sensitive to pollutants.

If used in a wide temperature range. Due to slower response than capacitive sensors. Effective temperature compensation control is required, otherwise the sensor will struggle to function properly.

Therefore, the application of this type of sensor is more limited, and there is no public report on the use of a resistive dew point meter for observation in the field of meteorology.

Capacitive Dew Point Meters:

  • These meters work a little differently. They use the idea that air’s electrical properties change when it gets more moist.
  • They have a special sensor that can measure these changes.
  • When the air’s moisture level gets to the dew point, these properties change a lot. This change is measured, and the meter calculates the dew point.
  • These meters are strong and reliable. They’re great for use in tough environments like industrial processes.

To put it simply, chilled mirror meters are like finely-tuned temperature takers. They give very precise measurements. Capacitive ones are more like tough tools that give reliable measurements, even when things get hard. Both kinds are great at measuring the dew point, helping us keep things just right in lots of different situations. Stick around to see some examples of how we use dew point measurements!

Applications of Dew Point Measurement in Different Industries

If you thought dew point measurement is just a fancy scientific concept, you’re in for a surprise. It’s a real-world superhero, making a difference in various industries. Let’s explore how:

HVAC Systems: In the world of heating, ventilation, and air conditioning (HVAC), dew point measurement is like the control knob. It helps keep the moisture level just right. Too dry or too humid? Neither is comfortable. Plus, high humidity can even lead to mold growth. By measuring the dew point, HVAC systems can manage the moisture level, giving us comfortable and safe indoor spaces.

Food and Pharmaceutical Industries: Moisture control is like a secret ingredient in these industries. For instance, high moisture levels can lead to bacterial growth in food products. Similarly, the effectiveness of many pharmaceutical products can decrease with increased moisture. Dew point measurement helps keep a check on the moisture, ensuring the quality and safety of products.

Industrial Painting and Coating: Remember the cold drink with droplets forming on it? What if it’s a freshly painted surface and the droplets are not water but paint? That’s a recipe for a spoiled paint job. The surface temperature should be above the dew point when painting or coating. By measuring the dew point, we can ensure good adhesion and a longer-lasting paint job.

Compressed Air Systems: In industries using compressed air systems, like manufacturing or power generation, dew point measurement is the invisible guardian. Excess moisture can cause rust and increased wear and tear, hampering efficiency and safety. Regular dew point measurement can help maintain the health of these systems.

Here’s an example: the Energy Efficiency Best Practice Guide: Compressed Air Systems from the Australian Government highlights the importance of dew point measurement in managing energy efficiency and operational costs.

As you see, dew point measurement is like a secret key unlocking better quality, efficiency, and safety across various sectors. Isn’t it time we recognized its value and applied it more consciously in our operations? Stay with us as we answer some frequently asked questions about dew point measurement!


Dew point is measured using instruments like a chilled mirror dew point meter or capacitive sensors, which determine the temperature at which air becomes fully saturated with water vapor.

A 40% dew point refers to the amount of moisture in the air. At 40%, the air is relatively dry, making it comfortable for most people.

A dew point of 70 degrees indicates a high level of moisture in the air, typically resulting in a muggy or uncomfortable feeling.

Dew point is measured using devices called dew point meters, which utilize chilled mirror or capacitive technology.

Dew point measurement refers to determining the temperature at which air becomes saturated with water vapor, leading to the formation of dew or condensation.

We hope this guide to dew point measurement has given you valuable insights and cleared any confusion you may have had. Remember, dew point measurement is like the unsung hero of the industrial world. It ensures efficiency, maintains quality, and safeguards operations.

With years of experience under our belt, we understand that each industry and each application is unique. That’s why we offer customizable solutions. Whether you’re in the HVAC, food and pharma, painting and coating, or any other industry, we’ve got you covered.

Our Sino-Inst team of experts is always ready to guide you, answer your questions, and provide the most fitting solutions. Remember, choosing the right dew point meter doesn’t have to be daunting. We’re here to help.

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Dew Point Transmitter 608 Series

Dew Point Transmitter, referred to as dew point analyzer, is an instrument for measuring the moisture content in gas. Dew Point Transmitter 608 Series uses polymer material resistance capacitive dew point sensor. It can measure trace moisture content in various gases. It is suitable for various online analysis occasions that require strict control of moisture content.

Features of Dew Point Transmitter 608 Series

  • Original ultra-small and integrated high temperature and humidity sensor module. Simple installation, convenient for system networking and wiring;
  • SHT series temperature and humidity sensors imported from Switzerland SENSIRION are adopted. The acquisition accuracy is high and the consistency is good;
  • Onboard CR2450 wide-temperature button battery. External power failure still ensures the normal operation of the module, and the data will not be lost;
  • Integrated large-capacity flash chip. Allows storage of up to 65,000 records. Meets long-term recording requirements;
  • Ultra-low power consumption design. When powered by on-board button battery, the average power consumption is only tens of microamperes;
  • Simultaneously output temperature and humidity, dew point temperature, wet bulb temperature.
  • With Smart Logger host computer software, the data can be downloaded and professionally analyzed.
  • Adopt standard Modbus-RTU protocol. It can easily realize the interface with PLC, DCS and various configuration software;
  • Communication protection: RS485 communication signal output interface adopts double overvoltage and overcurrent protection;
  • 4.5V~12V ultra-wide voltage input;
  • Power polarity protection, with anti-reverse connection function.

Technical Parameters

ItemTechnical Specifications and Features
Powered byDC 4.5V~12V, onboard CR2450 3V button battery
power consumption<0.1W
Range-30~80℃, 0~99%RH
The accuracyTemperature ±0.1°C(@20-60°C)
Humidity ±1.5%RH(@0-80%RH,@25℃)
Long-term stabilityHumidity: <1%RH/Y Temperature: <0.1°C/Y
Dew point range-60°C~60°C (-76 to 140°F)
Response time10S(1m/s wind speed)
Communication InterfaceRS485/MODBUS-RTU
Records and SoftwareSupport 65,000 records, equipped with Smart Logger professional data management and analysis software
Communication baud rate1200, 2400, 4800, 9600, 19200, 115200 can be set, the default is 9600pbs
Byte format8 data bits, 1 stop bit, no parity

Dew Point Transmitter 608 Series Advantages

  • Quick response
  • Can measure humidity, temperature, wet bulb temperature, temperature. the
  • Good stability, small annual drift
  • Rugged IP65 protection grade
  • The measurement data is automatically stored, and 65,000 pieces of data can be stored, and users can browse historical data at any time
  • Built-in large-capacity lithium battery, it can continue to work even when the power is off

Dew Point Transmitter Application

  • Dew point management for compressed air Drying dryers for plastic raw materials
  • Installed in a freeze dryer
  • Installed in the important position of the pipeline
  • Plastic raw material drying dryer
  • In heat treatment furnace
  • Installation in electroplating furnace
  • Installed in a plastic firing furnace
  • Purity Control for Gas Generators
  • Installed in an oxygen generator
  • Installed in a nitrogen generator   


While the Dew Point Transmitter 608 Series is a highly sophisticated device designed to offer precise and reliable measurements, it’s important to note that like any instrument, it can be sensitive to extreme temperature fluctuations and may require periodic calibration to ensure sustained accuracy. However, at Sino-Inst, we’ve incorporated advanced technology and robust design features to mitigate these challenges, setting the 608 Series apart as a reliable solution in the industry.

The purpose of the Dew Point Transmitter is to accurately measure the moisture content in various gases. This information is critical for industries and applications that require strict control over humidity levels, such as the pharmaceutical, food and beverage, HVAC, and electronics sectors, to name a few.

The Dew Point Transmitter 608 Series is a specific tool designed to measure dew point. It’s an essential piece of equipment for any operation looking to accurately monitor and control the moisture content in gases. With its advanced polymer material resistance capacitive dew point sensor, the 608 Series offers top-tier accuracy and reliability.

The range of the dew point sensor in the 608 Series can vary, as it’s designed to be adaptable for a variety of industrial applications. This series offers a wide measurement range, which allows for highly accurate monitoring of trace moisture content in various gases. For detailed specifications and individual requirements, please don’t hesitate to contact us.

For any other questions or further information about our Dew Point Transmitter 608 Series, we are always here to assist. Reach out to us today!

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As we reach the culmination of our introduction to the Dew Point Transmitter 608 Series, it’s time to summarize the exceptional features of this innovative product:

  • A comprehensive measuring range of -60 to +60°C.
  • A compact design encased in robust stainless steel.
  • Sensors with remarkable long-term stability.
  • A rapid response time, and
  • An impressive accuracy of ±2°C at an ambient temperature of 25°C.
  • All these features make the 608 Series a reliable solution for all your temperature and humidity data collection needs.

At Sino-Inst, we don’t just supply products; we offer solutions backed by extensive industry experience. We understand that your needs are unique, and so is our approach to fulfilling them. Our commitment to precision, reliability, and customer satisfaction drives us to offer customization services that ensure our product fits seamlessly into your operations.

Take the next step towards better control and superior accuracy. Embrace the Sino-Inst difference with the Dew Point Transmitter 608 Series today. Your journey towards precise environmental data collection and control is just a click away. Reach out to us now!

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Dew Point Meter 602 Series

The Dew Point Meter 602 Series is a compact and lightweight dew point transmitter. With long-term stability and good reliability, the sensor has strong anti-pollution ability. It is very suitable for industrial occasions with relatively harsh environments.

Dew Point Meter 602 Series can output temperature, humidity, dew point measurement data. It can be interconnected with PLC, man-machine screen, DCS and various configuration software.

Features of Dew Point Meter

  • Stainless steel shell, compact and highly integrated;
  • Support RS485 output and one analog output (4~20mA/0~5V/0~10V optional) at the same time;
  • Anti-condensation, which allows the sensor to remain in sync in high humidity environments;
  • Using the standard Modbus-RTU protocol, it can easily realize the interconnection with PLC, DCS and various configuration software;
  • 10V~30V ultra-wide voltage input, power polarity protection, with anti-reverse connection function;

Technical Parameters

CategoryTechnical Specifications and Features
Powered byDC 10V~30V
Power consumption<0.1W
Range-40~80℃, 0~100%RH
Dew point-100~80°C (can be set, subject to the range of temperature and humidity)
Signal output4~20mA (RL-500Q) /0~5V/0~10V (RL>10KQ)
1 channel RS485 Modbus-RTU
Typical Accuracy
(20℃, 50%RH, one standard atmosphere)
Temperature: ±0.1℃
Humidity: ±2%RH
Dew point: ±2°C (in air or N2)
Acquisition frequencyFastest 1s response, others can be set according to PLC
Withstand voltage16 bars
Digital output resolution0.01°C/0.1°C optional, 0.01%RH/0.1%RH optional
Communication baud rate1200, 2400, 4800, 9600, 19200 can be set, the default is 9600pbs
Byte format8 data bits, 1 stop bit, no parity

Dew Point Meter Analog output calculation

Analog output calculation

For example, the range is -40~+80 degrees Celsius, and the output is 4~20mA. When the output signal is 12mA, calculate the current temperature value.

This temperature range has a span of 120 degrees and is represented by a 16mA current signal.
120 degrees/16mA=7.5 degrees/mA, that is, a current of 1mA represents a temperature change of 7.5 degrees.
Measured value 12mA-4mA=8mA, 8mA*7.5 degrees/mA=60 degrees.

60+(-40)=20 degrees, the current temperature is 20 degrees.

Voltage output signal conversion calculation

For example, the range -40~+80 degrees Celsius, 0-10V output, when the output signal is 5V, calculate the current temperature value.

The span of this temperature range is 120 degrees, expressed by 10V voltage signal, 120 degrees/10V=12 degrees/V.
That is, a voltage of 1V represents a temperature change of 12 degrees, and a measured value of 5V-0V=5V, 5V*12 degrees/V=60 degrees.
60+(-40)=20 degrees, the current temperature is 20 degrees.

The above calculations are generally used for debugging and analysis. When actually connected to the PLC/DCS system, the ADC conversion and digital display are performed by the PLC or DCS
The system is complete.


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