Patent ID: 9151726
Filing Date: 2015-10-06
Classification: G01N

Abstract:
1. A measurement device adapted for use with a current-type sensor unit, which, when applied with a driving voltage, is capable of reacting with a target substance for generating a sensor current that corresponds to a concentration level of the target substance, said measurement device comprising: a driving unit configured to generate the driving voltage that includes an alternating current (AC) component and a direct current (DC) component, and adapted to be connected electrically to the current-type sensor unit for providing the driving voltage to the current-type sensor unit; and a processing unit adapted to be connected electrically to the current-type sensor unit for receiving the sensor current from the current-type sensor unit, and configured to determine the concentration level of the target substance according to a peak-to-peak value of the sensor current received by said processing unit; wherein said processing unit includes: