Sensor device and sensor arrangement

A sensor device comprising:

• a light source configured to emit a primary radiation,
• a detector comprising a plurality of detector units,
• a reflecting optical element arranged optically between the light source and the detector, and
• a sensor film comprising metallic nanoparticles geometrically between the reflecting optical element and the detector,
• wherein
• the sensor film is configured to be exposed to a liquid or gas, and
• the detector is configured to detect a spectral change in the primary radiation (P) caused by the sensor film upon exposure to the liquid or gas,
• the reflecting optical element is a parabolic mirror, the reflecting optical element is the only reflective optics in a beam path between the light source and the detector, and
• the detector is configured to detect secondary radiation scattered by the metallic nanoparticles, and
• the primary radiation from the light source scattered at the metallic nanoparticles is measured in a transmission configuration.