電(dian)(dian)(dian)容(rong)液體(ti)傳(chuan)(chuan)感器(qi)DSW-1和DSW-2系列利用電(dian)(dian)(dian)容(rong)原理，當液體(ti)高度達(da)到傳(chuan)(chuan)感器(qi)接觸面時會引(yin)起電(dian)(dian)(dian)容(rong)值變化，控制器(qi)通過(guo)(guo)變化量對比(bi)并轉化為(wei)高低電(dian)(dian)(dian)平(ping)或(huo)電(dian)(dian)(dian)壓值輸出信(xin)號(hao)(hao)，外部控制板(ban)通過(guo)(guo)檢測高低電(dian)(dian)(dian)平(ping)信(xin)號(hao)(hao)或(huo)不同的電(dian)(dian)(dian)壓值即可判斷對應液位(wei)高度。DSW-3系列非接觸液位(wei)模組還集成了光耦液位(wei)傳(chuan)(chuan)感器(qi)、液位(wei)開關的信(xin)號(hao)(hao)檢測功能(neng)，信(xin)號(hao)(hao)通過(guo)(guo)模塊處(chu)理后再(zai)一起輸出，減少連(lian)接線。