METHOD AND DEVICE FOR MEASURING THE CONCENTRATION, VISCOSITY AND SURFACE TENSION OF A SUBSTANCE USING A RESONATOR

摘要

The present invention is related to the method and device for measuring the chemical and biological analyte or viscosity and surface tension of the liquid. The device is comprised of a tuning fork type quartz crystal resonator having an associated resonant frequency and the sensing part attached to at least one prong of the resonator. The sensing part is made from low density and high surface area material, e.g. carbon nanotube fibre. Method comprises the immersing of only the sensing part of the device into the liquid, excitation of the sensor with electric field and registration of the changes in resonant frequency due to changes in mass of the sensing part or due to changes in viscosity and surface tension of the liquid.