FIELD: measurement technology. SUBSTANCE: device for measurement of parameters of thermal destruction of coals has upper and lower heated corrugated discs, electric motor coupled to lower corrugated disc, pulley coupled to upper corrugated disc and dynamometer with thee help of cable. Unit to measure displacement of disc is manufactured in the form of displacement indicator contacting upper corrugated disc mounted for vertical movement. Bar with hole is built into cable. Two sources of light are positioned under hole in parallel to cable. Two photocells, one connected to electric motor by means of amplifier and voltage regulator, the other one connected with the aid of amplifier and contact relay are placed uniaxially with sources of light under bar. EFFECT: simplification of process of measurement. 1 dwg
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