A sensor device comprising: a plurality of sensors (102a-f), wherein each sensor (102a-f) comprises an optical resonance element (106a-f), wherein an optical characteristic of the optical resonance element (106a-f) is configured to be affected by a measurand to be measured by the sensor (102a-f) and wherein each sensor (102a-f) in the plurality of sensors has a mutually unique optical resonance frequency; the plurality of sensors (102a-f) being configured to receive at least one of a first and a second sensor interrogation signals, wherein the first sensor interrogation signal comprises a first optical frequency comb of first frequencies defining a plurality of first signal components being separated by a first repetition frequency, wherein the second sensor interrogation signal comprises a second optical frequency comb of second frequencies defining a plurality of second signal components being separated by a second repetition frequency different from the first repetition frequency, wherein each of the plurality of first signal components is associated with a respective one of the plurality of second signal components to form a plurality of signal component pairs, wherein a difference in frequency between the associated first signal component and second signal component is different for different signal component pairs; wherein an optical resonance of the optical resonance element (106a-f) of each sensor (102a-f) is associated with one, mutually unique, signal component pair of the plurality of signal component pairs such that each sensor (102a-f) is configured to modulate the at least one of the first and second sensor interrogation signal by the measurand to modulate an optical intensity and/or phase of at least one of the associated first signal component and second signal component of the mutually unique signal component pair; and a detector, being configured to receive the first sensor interrogation signal and the second sensor interrogation signal, at least one of which being modulated by the plurality of sensors (102a-f) being affected by the measurand, wherein the detector is configured to detect a plurality of beat frequencies corresponding to mutually unique differences in frequency between the associated first signal component and second signal component for different signal component pairs for detecting a plurality of measurements by the plurality of sensors (102a-f). a plurality of sensors (102a-f), wherein each sensor (102a-f) comprises an optical resonance element (106a-f), wherein an optical characteristic of the optical resonance element (106a-f) is configured to be affected by a measurand to be measured by the sensor (102a-f) and wherein each sensor (102a-f) in the plurality of sensors has a mutually unique optical resonance frequency; the plurality of sensors (102a-f) being configured to receive at least one of a first and a second sensor interrogation signals, wherein the first sensor interrogation signal comprises a first optical frequency comb of first frequencies defining a plurality of first signal components being separated by a first repetition frequency, wherein the second sensor interrogation signal comprises a second optical frequency comb of second frequencies defining a plurality of second signal components being separated by a second repetition frequency different from the first repetition frequency, wherein each of the plurality of first signal components is associated with a respective one of the plurality of second signal components to form a plurality of signal component pairs, wherein a difference in frequency between the associated first signal component and second signal component is different for different signal component pairs; wherein an optical resonance of the optical resonance element (106a-f) of each sensor (102a-f) is associated with one, mutually unique, signal component pair of the plurality of signal component pairs such that each sensor (102a-f) is configured to modulate the at least one of the first and second sensor interrogation signal by the measurand to modulate an optical intensity and/or phase of at least one of the associated first signal component and second signal component of the mutually unique signal component pair; and a detector, being configured to receive the first sensor interrogation signal and the second sensor interrogation signal, at least one of which being modulated by the plurality of sensors (102a-f) being affected by the measurand, wherein the detector is configured to detect a plurality of beat frequencies corresponding to mutually unique differences in frequency between the associated first signal component and second signal component for different signal component pairs for detecting a plurality of measurements by the plurality of sensors (102a-f).