DEVICE FOR DETERMINING CHARACTERISTICS OF GAS AND LIQUID SAMPLES Russian patent published in 1995 - IPC

FIELD: instrumentation engineering. SUBSTANCE: stepping drives are rigidly coupled with case and function to independently displace, respectively, mounting unit for sample-carrying board and reading unit along two relatively perpendicular axes. Mounting unit has spring-loaded lock fixing board when mounting board is displaced towards reading unit. Emitter and photodetector are located, respectively, at bottom and on top of plane over which mounting unit is displaced. Reading unit has additional photodetector whose signals are used to maintain constant emitter brightness characteristics through controlled power supply. EFFECT: improved design. 3 cl, 3 dwg