What is a pressure transmitter? Professionalمنذ 5 أشهر - Multimedia - Saïda - 85 الآراء
Pressure Sensor Types: Piezoresistive Sensors & Pressure Measuring Methods
Whether you are new to the technology or have worked with pressure sensors for years, how confident are you with some of the terminology involved in pressure sensor selection? Today I will provide a refresher on the common terminology you will be exposed to during your quest to spec the best pressure sensor for your application.
With a growing pressure sensor market and an increase in applications for the technology, as an engineer you are bound to work with pressure sensors if you haven’t already. A recently published Zion Research report on the market estimates the global demand for pressure sensors to reach USD 9.5 billion by 2020, up from USD 6.5 billion in 2014. The key markets for pressure sensors are automotive, consumer electronics, industrial, medical, and oil & gas, though the application of this technology is ever-expanding.
As pressure sensors become increasingly prevalent, it is important for engineers to know the basic terminology for product selection. Let’s review some of the common terms and questions related to selecting a pressure sensor.
How Does a Pressure Sensor Work? Piezoresistive Sensors
The most common type of pressure sensor for general purpose detection uses a diaphragm made of silicon or stainless steel (for harsher applications) as a strain gauge, meaning a flexible material designed to deflect in proportion to the amount of applied pressure. That deflection is a measured value that is converted into an electrical signal the sensor can interpret. When taking a deeper technical dive into how the sensing element works, you may hear reference to piezoresistive type pressure sensors. Piezo comes from the Greek word “piezein,” which means “squeeze” or “apply some pressure.” The piezoresistive effect is the change in electrical resistance of a semiconductor material due to mechanical stress across the piezo material, or diaphragm. Piezoresistive sensors convert the mechanical energy from the deflected diaphragm into proportionate levels of resistance, unlike their cousin the piezoelectric sensor, who converts the stimulus to a charge or voltage. Piezoresistive sensors are typically available in a wider variety of packaging options and specify abilities greater than 10 mV/V. An example of a piezoresistive pressure sensor is the 33A-015D from TE Connectivity.
Pressure Transducers and Water Pipe Pressure Measurement
Water pressure transducers also called a water pressure sensor,
are pressure transmitters that can measure water pipe pressure.