Pressure sensors play a crucial role in the industrial sectors. The accuracy and pressure control help operate the machinery at desired pressure conditions. However, there are different types of press sensors available in the market, each with its own set of options.
One of the most reliable solutions is a ceramic piezoresistive sensor. It has gained attention because of its accuracy, speed, and precision. Today, we will evaluate piezoresistive sensors and determine how they are suitable for your industrial environments.
Let’s discuss the benefits of piezoresistive sensors!
What is a Piezoresistive Ceramic Pressure Sensor?
A piezoresistive ceramic pressure sensor is a common sensor that withstands environmental conditions and responds to changes in pressure through its resistance mechanisms.
They are made of a ceramic material that is highly durable and suitable for harsh environmental conditions.
The working mechanism is typical of other pressure sensors. Here are a few key points highlighting its working mechanism.
- External pressure produces mechanical stress. It acts on the ceramic diaphragm.
- The diaphragm either bends or deforms slightly, altering the resistance of the piezoresistive elements.
- A Wheatstone bridge circuit is installed. Its purpose is to measure the change in resistance and convert it into an electrical signal.
Display systems show this electrical signal as pressure values and help provide accurate pressure readings.
Advantages of Piezoresistive Ceramic Pressure Sensors
Piezoresistive sensors offer more benefits and are superior to metallic or silicone-based sensor systems. Here is a list of superior options for piezoresistive sensors compared to normal sensors.
High Precision
One of the main reasons behind piezoresistive sensors is the high measurement precision and consistency. It is due to the high-sensitivity diaphragm, which detects even a slight change in pressure.
A few more factors contribute to the high precision of piezoresistive sensors.
- High sensitivity makes a small pressure change a prominent and essential part.
- Stable ceramic diaphragm structure provides longevity.
- The Wheatstone bridge is famous for high-quality signal processing and ultimate results.
High accuracy makes it an ultimate tool for the following applications.
- Управление промышленными процессами
- Medical instruments
- Environmental monitoring systems
- Гидравлическое и пневматическое оборудование
Exceptional Corrosion Resistance
Corrosion Resistance is a significant factor behind the inaccurate pressure values. Metallic pressure sensors react with water, forming an oxide layer. It slowly and progressively deteriorates the diaphragm and other components, leading to inaccurate values and long-term damage.
However, such a case is no longer available with the piezoresistive ceramic sensors. Thanks to its ceramic composition, it is completely inert and doesn’t react with acids, bases, or other materials.
The superior features include:
- Strong chemical stability because of no reaction risks.
- Resistance to oxidation as the surface is inert and doesn’t react with water.
- Low permeability to corrosive fluids keeps corrosion miles away.
Excellent Mechanical Strength
Pressure sensors are often components of industrial machinery and tools. They experience high temperature and pressure stress under harsh environmental conditions. Many low-quality materials fail to perform in the long run.
However, piezoresistive ceramic pressure sensors are the ultimate solution because of their high mechanical strength. High hardness makes it difficult to break and provides stable performance even under extreme environmental conditions.
The prominent benefits of high mechanical strength include:
- Mechanical shocks are common in industries; however, piezoresistive ceramic pressure sensors are resistant to them and last longer in this environment.
- Reduced risk of diaphragm deformation enables longer service life.
- Stable sensor calibration provides accurate pressure measurements.
High Temperature Stability
Industrial environments involve extremes of temperature. Above all, there is a sudden temperature fluctuation. Metallic sensors fail to provide stable pressure readings in such conditions.
However, our piezoresistive ceramic pressure sensors have low thermal expansion and excellent temperature stability. Therefore, high temperatures or sudden temperature fluctuations can’t affect it.
Here are a few benefits.
- Reduced measurement drift and accurate values.
- Reliable performance even in hot and extreme environments
- Better accuracy in changing temperatures.
This is why piezoresistive pressure sensors are used in the following sectors.
- Industrial boilers
- Автомобильные двигатели
- Energy systems
- Chemical reactors
Long-term Solution
Who wants to invest in sensors again and again? Piezoresistive ceramic pressure sensors also follow the same concept—single, but long-term, investment with accurate results.
Generally, metallic and other pressure sensors corrode and fail over time. However, those who perform show a decrease in accuracy over time.
However, this is not the case with the piezoresistive ceramic pressure sensors. They have a high mechanical strength and offer stable results even after many years.
The key benefits include:
- Stable measurement output because of high strength and long-lasting performance.
- Low signal drift and highly consistent results make it an ideal choice.
- Reduced maintenance requirements, lower investment costs, and accelerated ROI.
Wide Pressure Measurement Range
Piezoresistive ceramic pressure sensors are well known for their wide pressure measurement range. They can handle a wide range, reaching from 10 kPa up to 100 MPa.
It covers most industrial tools, making it a good choice for automotive systems. A wide range of measurements makes it suitable for the following applications.
- Hydraulic systems use it to monitor pressure changes and operate in a controlled environment.
- Gas pressure monitoring
- Промышленная автоматизация
- Экологический мониторинг
Comparison with Other Pressure Sensor Technologies
Piezoresistive ceramic pressure sensors are superior to other technologies. We have set up a head-to-head comparison to understand why they are ideal.
| Feature | Ceramic Piezoresistive Sensors | Metal Sensors | Silicon Sensors |
| Устойчивость к коррозии | Excellent | Moderate | Low |
| Measurement accuracy | High | Moderate | High |
| Temperature stability | Excellent | Moderate | Moderate |
| Mechanical durability | Very high | Moderate | Low |
| Maintenance needs | Low | Moderate | High |
Заключение
Piezoresistive sensors are highly accurate and provide consistent values in industrial settings. By leveraging advantages such as high precision, corrosion resistance, mechanical strength, and long-term reliability, you can gain greater benefits from your machinery.
Do you want to purchase high-end sensors? Sendo-sensor offers premium piezoresistive sensor solutions. Our PS100 is a highly accurate and responsive sensor that reduces the chances of errors and withstands harsh environmental conditions. Moreover, it is affordable compared to market prices. Contact us for more information!