FIELD: process engineering.
SUBSTANCE: invention relates to filter system. Filter system comprises casing, filter medium arranged there inside and optical sensor of analytes also arranged therein and communicated with filer medium. Analyte optical sensor comprises detection medium to vary at least one of optical characteristics under influence of analyte. Besides, filter system comprises additionally the optical reader including at least one light source and at least one detector. Optical reader is secured to the casing so that at least light portion emitted by at least one light source is reflected from analyte optical sensor and received by at least one receiver.
EFFECT: expanded range volatile vapour detection, correct indication of life expiration.
11 cl, 1 tbl, 19 dwg
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