共和小型壓力傳感器通常由壓力敏感元件和信號處理單元組成。是能感受壓力信號，并能按照一定的規律將壓力信號轉換成可用的輸出的電信號的器件或裝置。敏感元件的作用是使被測壓力作用于某個面積上并轉換為位移或應變，然后由位移敏感元件或應變計轉換為與壓力成一定關系的電信號。
共和小(xiao)型(xing)壓力(li)傳(chuan)感器可以分為很多類(lei)型(xing)，接下來帶你了解一下其中一部分：
電(dian)(dian)(dian)(dian)容(rong)式壓(ya)(ya)力(li)傳感器(qi)是一種利用電(dian)(dian)(dian)(dian)容(rong)作為(wei)敏感元件，將被測壓(ya)(ya)力(li)轉換成電(dian)(dian)(dian)(dian)容(rong)值改變(bian)的(de)設備，一般采用圓(yuan)形金屬薄(bo)膜(mo)(mo)或鍍金屬薄(bo)膜(mo)(mo)作為(wei)電(dian)(dian)(dian)(dian)容(rong)器(qi)的(de)一個(ge)電(dian)(dian)(dian)(dian)極(ji)，當(dang)薄(bo)膜(mo)(mo)感受壓(ya)(ya)力(li)而變(bian)形時，薄(bo)膜(mo)(mo)與(yu)固定電(dian)(dian)(dian)(dian)極(ji)之間形成的(de)電(dian)(dian)(dian)(dian)容(rong)量(liang)(liang)發生變(bian)化，通過(guo)測量(liang)(liang)電(dian)(dian)(dian)(dian)路即可輸出與(yu)電(dian)(dian)(dian)(dian)壓(ya)(ya)成一定關(guan)系的(de)電(dian)(dian)(dian)(dian)信號(hao)。
壓(ya)(ya)阻(zu)(zu)壓(ya)(ya)力傳(chuan)感器主要基于(yu)壓(ya)(ya)阻(zu)(zu)效(xiao)應(ying)。壓(ya)(ya)阻(zu)(zu)效(xiao)應(ying)是用(yong)來描(miao)述材(cai)料在受到機械式應(ying)力下所(suo)產(chan)生(sheng)的電(dian)(dian)(dian)阻(zu)(zu)變化(hua)(hua)。不同于(yu)上述壓(ya)(ya)電(dian)(dian)(dian)效(xiao)應(ying)，壓(ya)(ya)阻(zu)(zu)效(xiao)應(ying)只產(chan)生(sheng)阻(zu)(zu)抗變化(hua)(hua)，并不會(hui)產(chan)生(sheng)電(dian)(dian)(dian)荷。一般(ban)(ban)通過(guo)引線(xian)接(jie)入惠斯登電(dian)(dian)(dian)橋(qiao)中。平(ping)時敏感芯(xin)體沒有外加壓(ya)(ya)力作用(yong)，電(dian)(dian)(dian)橋(qiao)處(chu)于(yu)平(ping)衡狀(zhuang)態(tai)（稱為零位），當傳(chuan)感器受壓(ya)(ya)后芯(xin)片電(dian)(dian)(dian)阻(zu)(zu)發(fa)生(sheng)變化(hua)(hua)，電(dian)(dian)(dian)橋(qiao)將(jiang)失(shi)去平(ping)衡。該(gai)傳(chuan)感器為減(jian)小溫度變化(hua)(hua)對(dui)芯(xin)體電(dian)(dian)(dian)阻(zu)(zu)值的影響，提高測量精度，一般(ban)(ban)采用(yong)溫度補償措施使其零點(dian)漂(piao)移、靈敏度、線(xian)性度、穩定性等技(ji)術指標保持較高水平(ping)。
壓電式壓力傳感器主要基于壓電效應，利用電氣元件和其他機械把待測的壓力轉換成為電量，再進行相關測量工作的測量精密儀器，比如很多壓力變送器和壓力傳感器。壓電傳感器不可以應用在靜態的測量當中，原因是受到外力作用后的電荷，當回路有無限大的輸入抗阻的時候，才可以得以保存下來。但是實際上并不是這樣的。因此壓電傳感器只可以應用在動態的測量當中，主要的壓電材料是：磷酸二氫胺、酒石酸鉀鈉和石英。
