A Low-Cost, Normally Closed, Solenoid Valve for Non-Contact Dispensing in the Sub-µL Range

Micromachines

Stefan Borja Bammesberger²  Sabrina Kartmann²  Laurent Tanguy¹  Dong Liang¹  Klaus Mutschler²  Andreas Ernst²  Roland Zengerle² 

[1] Institut für Mikro- und Informationstechnik, HSG-IMIT, Wilhelm-Schickard-Straβe 10, 78052 Villingen-Schwenningen, Germany; E-Mails:;Department of Microsystems Engineering, University of Freiburg, IMTEK, Georges-Köhler Allee 103, 79110 Freiburg, Germany; E-Mails:

关键词: non-contact dispensing;    solenoid valve;    normally closed;    disposable;   

DOI  :  10.3390/mi4010009

来源: mdpi

【 摘 要 】

We present a disposable, normally closed, non-contact dispensing valve for the sub-µL range. The miniaturized solenoid valve (diameter: 8 mm, height: 27.25 mm) is compatible to standard Luer-Lock interfaces. A highly dynamic actuation principle enables opening times down to 1 ms. The dispensing performance was evaluated for water (η = 1.03 mPas) and a 66% (w/w) glycerol/water solution (η = 16.98 mPas), at pressures varying from 200 to 800 mbar. The experimentally determined minimal dispensing volume was 163 nL (CV 1.6%) for water and 123 nL (CV 4.5%) for 66% (w/w) glycerol/water. The low-cost polymer valve enables high precision dispensing of liquid volumes down to the lower end of the sub-µL range comparable to high-end non-disposable micro-dispensing valves.

【 授权许可】

CC BY   
© 2013 by the authors; licensee MDPI, Basel, Switzerland.