Measurement of density and chemical concentration using a microfluidic chip.
A new microfluidic product for measuring fluid density, specific gravity and chemical concentration has been developed. At the core of this lab-on-a-chip sensor is a vacuum-sealed resonating silicon microtube. Measurements can be made with under a microliter of sample fluid, which is over 1000x less than is conventionally required. Since the product is MEMS-based the overall system size is a fraction of conventional density meters and it weighs much less than the traditional desk-top, temperature controlled, density meters. The syringe or pipette loaded system includes a dynamic temperature control system that operates between 0 degree C and 90 degree C with an accuracy of less than 0.01 degree C. Density measurement accuracies of 4 to 5 digits have been observed with aqueous solutions. Measurement examples and applications will be discussed.
Sparks
D
D
Integrated Sensing Systems Inc, 391 Airport Industrial Dr, Ypsilanti, MI 48198, USA. dsparks@mems-issys.com
Smith
R
R
Straayer
M
M
Cripe
J
J
Schneider
R
R
Chimbayo
A
A
Anasari
S
S
Najafi
N
N
D004867:Equipment Design; D000432:Methanol / Q000737:chemistry; D008832:Microchemistry / Q000295:instrumentation / Q000379:methods; D044085:Microfluidics / Q000295:instrumentation / Q000379:methods; D012822:Silicon Dioxide; D012996:Solutions / Q000737:chemistry*; D013499:Surface Properties
D012996:Solutions; D012822:Silicon Dioxide; D000432:Methanol