| 摘要 |
The invention relates to an apparatus (200), which comprises a first substance (220) in a microchannel (210) of the apparatus configured to react to a physical phenomenon or chemical phenomenon directed to the apparatus for providing an indication, which originates from the physical phenomenon or chemical phenomenon directed to the apparatus and indicates an occurrence of the physical phenomenon or chemical phenomenon directed to the apparatus. The invention also relates to a method, which is performed by means of the apparatus and a device, which comprises the apparatus.
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