在诸多医用仪器中,液体容量的监视和控制始终是医学工等人员设计考虑的课题之一。象人工贤机中透折液储液罐需要医护人员随时了解罐内液体储量,并能在液体缺少时及时补充;又如自动洗胃机同样需要对机内的冲洗进行监控,以保证维持一定的冲洗液储存。若上述仪器液体储量监控失灵都可能危及病人生命。通常的液位监视是把两个或若干个电极点 In many medical instruments, the monitoring and control of liquid volume has always been one of the topics considered by medical personnel and other personnel. Like the artificial machine in the pass liquid storage tank need medical staff keep abreast of liquid reserves, and in the absence of liquid replenishment promptly; Another example is the automatic gastric lavage machine also need to monitor the machine flush to ensure that to maintain a certain Rinse solution storage. Failure to monitor the above instrument liquid reserves may endanger the patient’s life. The usual level monitoring is to put two or more electrode points