| 主权项 |
1. A sensing system for sensing a substance in a fluid, the sensing system comprising:
a sensing site at which the substance is to be sensed, a reference site, a signal generation unit for generating a sensing signal by sensing the sensing site and for generating a reference signal by sensing the reference site, a normalization unit for generating a normalized sensing signal by normalizing the sensing signal using the reference signal, wherein the reference site and the signal generation unit are adapted such that the reference signal is not influenced by the substance and the fluid and the sensing site and the signal generation unit are adapted such that the sensing signal is dependent on the substance at the sensing site, wherein the sensing site and the reference site are arranged such that a drift variation of the normalized sensing signal is within a noise variation of the normalized sensing signal, wherein the sensing site and the reference site are integrated, the integrated sensing and reference site including a central sensing region with a radial reference region, the central sensing region partially covering the radial reference region. |
