Water Quality Testing in the Palm of Your Hand
Rapidly senses water impurities Inexpensive, portable hand-held device Real-time on-site water testing Minimal water sample required
Home water testing kits Water treatment facilities Environmental agencies
This technology uses inert polymers for the consistent packaging of an electrode layer, microbial layer, and microfluidic inlet and outlet ports. One embodiment is a disposable microsensor for continuous monitoring of free chlorine in water, while another is a disposable microbial sensor for rapid BOD measurement. For the chlorine sensor, gold, gold and silver/silver chloride comprise working, counter, and reference electrodes respectively. A transparent Cyclic Olefin Copolymer (COC) substrate is used for sensor fabrication by standard lithographic procedures. For the microbial sensor, a microbial strain is immobilized over one pair of sensor electrodes while the other is retained as a reference, where the BOD values of the sample can be measured in terms of the difference between the output signals. The sensor layer is attached to an injection molded passive microfluidic channel on top, used for a microfluidic package. This sensing circuitry is further connected to the display monitor showing the output data.
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