Pressure sensors for pressure measurement in medical applications

For the application of equipment with medium and low pressure requirement which includes gas / liquid chromatograph, chemical analyzer, ventilator, blood analyzer and diagnostic equipment, the pressure sensor must not only be able to directly contact with liquid medium or withstand humid environment, but also provide highly accurate pressure measurement results for a variety of media such as exhaled gas, reagent, sample and cleaning fluid. Circuit board mounted pressure sensors are often the preferred solution in pressure ranges below 150 psi and narrow space applications. They can achieve everything in terms of function, package size, reliability and cost.​

To obtain the most accurate pressure reading, the sensor should be as close as possible to the medium to be measured. However, not all pressure sensors are compatible with liquid media, which poses a big problem for medical device designers. In many cases, they need to design additional components such as bypass or filter to solve the humidity problem, or reconsider the positioning of components, especially setting pipelines in the system to avoid any fluid contact with the sensor. These tasks require additional design time and cost.