DIGITAL INFRARED HUMIDITY METER Russian patent published in 1998 - IPC

FIELD: technological processes in construction, wood-working and food industries. SUBSTANCE: digital optical humidity meter incorporates component light filter fixed immobile between symmetric light guide 2 and two photocurrent converters 4 and 5 connected to two photocurrent amplifiers 8 and 6 correspondingly, two commutators 7 and 9 controlled by frequency divider 11, integrator 10 connected with input to commutator 7 and with output - to two comparators 12 and 13 which outputs are connected to setting inputs of flip-flop 14. Output of flip-flop 14 is connected to controlling input of commutator 16 connecting generator 15 of clock pulses to pulse counter 17. EFFECT: increased functional reliability and efficiency. 2 dwg