摘要
本文介绍了一种小型医用液氮罐液位自动检测的仪器,它以铜导线为液位传感器,可连续显示液氮液位,并在某一下限值发出警报。电路设计合理,仪器成本较低,提高了保存生物样品的可靠性。
This article introduces the principle and design of a simple, compact and reliable liquid nitrogen level monitor used for specimen preserving in both biological and medical scientific research. A digital voltmeter is mounted as an indicator, and an audio alarm system begins to work when the liquid nitrogen level becomes unacceptably low. +10mm has been attained as a level resolution.
出处
《中国医疗器械杂志》
CAS
1990年第4期214-216,共3页
Chinese Journal of Medical Instrumentation
