The development of techniques for liquid level detection in auto clinical laboratory analyzers.
- Author:
Xianfeng ZHU
1
;
Kuo ZHANG
;
Sisi ZENG
;
Tao SUN
;
Wenhao ZHAO
;
Mingshi WANG
Author Information
1. College of Precision Instrument & Opto-Electronics Engineering, Tianjin Universty, Tianjin 300072, China. zhuxianfeng@tju.edu.cn
- Publication Type:Journal Article
- MeSH:
Automation;
Clinical Laboratory Techniques;
instrumentation;
methods
- From:
Journal of Biomedical Engineering
2010;27(4):949-952
- CountryChina
- Language:Chinese
-
Abstract:
Liquid level detection (LLD) is necessary for eliminating carry-over of needle's outside by limiting the depth the needle probes into liquid in auto clinical laboratory analyzers. This paper listed various demands of liquid-handling system under different situations; reviewed various LLD techniques, such as capacitive, air pressure, mechanical vibration, ultrasound, light reflection, CCD imaging etc.; briefly introduced the working principles, features, and limitation of the LLDs; and recapitulated the characteristics of contact and non-contact LLDs. Lastly, the next generation technique of LLD is prospected.
