Pressure Sensors

The elements or instruments measure the liquids or gas pressure. Pressure sensors convert the actual pressure into electronic signals that can be easily read. In addition to directly measuring pressure, these sensors can also infer other metrics such as the flow of fluids/gases, velocity, water levels, and even altitude. Known by a variety of names - including pressure transducers, pressure transmitters, pressure senders, pressure indicators, pressure gauges, and manometers - these versatile devices are integral to numerous sectors, from aerospace and healthcare to the petrochemical industry.

History of Pressure Sensor Development

The development of MEMS chips largely determines the pressure sensor development. It is essentially semiconductor sensors. C.S. Smith discovered the piezoresistive effect of silicon and germanium in 1954.  This effect meant that when an external force is applied to a semiconductor material, its resistance would change significantly. Based on this principle, a strain resistor was glued to a metal film to convert the force signal into an electrical signal, thus enabling pressure measurement.

This marked the birth of piezoresistive pressure sensors. Subsequently, along with the silicon diffusion technology, each anisotropic corrosion technology and after the 80's micro-processing technology, gradually bring the pressure sensor to the micron level and the large volume development stage.

How does Pressure Sensor Work?

The pressure sensor works by converting the applied pressure into electrical signals. And they measure and interpret electrical signals through control system and user interface. There are many types of pressure sensors, while most of them have the following working principles.

• Piezoresistive: This type uses diaphragm (usually made of silicon or a metal)，which leads to deformation in case of applied certain pressure. The resistance embedded strain gauges or piezoresistors have been changed due to the deformation. Then, it is converted into an electrical signal proportional to the applied pressure.

• Piezoelectric: Piezoelectric materials (such as quartz) are used among piezoelectric pressure sensors, which generates an electric charge when applied to pressure. The generated charge is proportional to the applied pressure. Meanwhile, it can be measured as an electrical signal.

• Capacitive: Capacitive pressure sensors have a diaphragm between two conductive plates. Once applied certain pressure, the shape of diaphragm and the distance between the plates will be changed, subsequently altering the capacitance. Meanwhile, changes in capacitance are measured and converted into an electrical signal.

There are just a few types of pressure sensor. Different types of pressure sensors have different advantages and disadvantages. The performance of pressure sensor depend on specific applications, required accuracy, sensitivity and environment conditions. However, it is worth mentioning that different types of pressure sensors have the same basic woring principle and function. This means pressure sensors convert the applied pressure into electrical signals for measurement and analysis.

Pressure sensors play a crucial role in oil and gas applications, encompassing a wide range of pressure types during the measurement process, including gauge, absolute, differential, high pressure, and micro differential pressure, among others. Our engineers possess extensive experience in this sector and possess a deep understanding of the challenges and intricacies involved in oil and gas processes. By applying our cutting-edge technology, we provide pressure measurement solutions for our customers to ensure process and product safety in the oil and gas industry.

The main production processes of a pressure sensor is gluing, binding, diaphragm welding, oil filling, sealing, pressure impact, aging, temperature compensation, resistance adjustment and inspection.

The quality of sensors is not only influenced by its properties, but also by its production process. The R&D and manufacturing of industrial pressure sensors and transmitters of Micro Sensor is original from the 1970s, with our production line showing the development of china’s sensor technology. Over the years, the production line has been expanded and upgraded several times, representing the great progress of the industry.

At present, Micro Sensor have its own advanced manufacturing site, realizing digitization, automation, and flexibility and manufacturing series star products including MPM280, MPM281, and MPM283, which conforms to the highest quality criteria to meet the clients’ satisfaction.

The containment risk and cleanness difficulties are widely regarded as a matter of significant public concern during food and beverages processing. The vital is each cans, bottles, bags or boxes leaving factory are of the highest quality and health, and follow the strict regulatory criteria. The reputation and profit of company are rely on these criteria.

It is necessary to establish a complete control and procedure for smooth and efficient operation. Precision and reliable pressure sensors play vital role in process optimization. Whether measuring level of fermentation tank or discharge pressure, advanced pressure sensors contribute to the secure of food and beverages.

Micro Sensor has been attached importance to the sanitation in product applications over 50 years. Tailored sensing solutions have been made by engineers of Micro Sensor, aiming to improving your production efficiency. In addition, the inner professional R&D team is committed to provide specialized and cost-effective pressure sensors to meet client’s demands. If you have any questions or suggestions, please feel free to leave a message. Micro Sensor’s sales engineers will response within 24 hours, ensuring timely and personalized help.