摘要
本文介绍了一种生物医学科研工作需要的小型液氮罐内液氮液位自动监测仪。该仪器以铜导线做为液位传感器,可连续地显示出液氮罐内液氮液位的高度值,并在某一下限值发出警报。电路设计合理,成本低,提高了保存生物样品的安全性。
This article introduces a principle and a design of a simple compact and reliable liquid nitrogen level monitor which is used in biological and medical scientific researches for specimen preserving. A digital voltmeter is mounted as a indicator and an audio alarm system begin to work when the liquid nitrogen level is unacceptably low ±10mm has been attained as a level resolution.
出处
《医疗装备》
1990年第4期15-17,共3页
Medical Equipment
