I'd appreciate something to make!Want to make a pressure sensitive safety switch, how to do more reasonable?Such as air cushion?
Simply put itMeasure the pressure of gas or liquid, there are generally two kinds of commonly used probe core.1. piezoelectric ceramic, this thing is generally good precision, after amplification, the general accuracy of 0.5%, the main measuring range of 0.5MPa~60MPa.2., the proliferation of silicon, this Dongdong good amplification, the progress can reach 0.2%. The sensitivity of diffused silicon is very high. It is generally used to measure micro pressure and small pressure change. Most applications are the core of diffused silicon. The range can range from -100KPa~60MPaAlso, if you measure the physical pressure, it can be done with a strain gauge!
It depends on what you test and what method you need to measure before you consider what pressure sensors to use, because there are many kinds of pressure sensors.
There are approximately 6 types of pressure sensor probes: diffused silicon or piezoresistive silicon, capacitor ceramic, sputtering film, ceramic thick film, sapphire,Diffused silicon and piezoresistive silicon are the precision of 0.25%, the accuracy of 0.175% and the highest 0.05% range -1~60MPACapacitor ceramic: high precision, good stability, but bulky, high price..Sputtering film: high precision, 0.175% range, can achieve 300MPA, good stability, linear, temperature drift, and other similar than a lot better. The volume is the smallest in all kinds. But he is mainly aimed at medium or high pressure, or bad environment!Ceramic thick film: precision 0.5%, measuring range is relatively wide, other properties are relatively moderate in all kinds, but it is cheap and has a wide range of applications!See customer specific applications, choose the appropriate core, ceramic thick film can meet the need, piezoresistive stainless steel or sputtering.. Specific circumstances specific treatment!
