DEVICE AND METHOD MEASURING THERMOPHYSICAL PROPERTIES OF LIQUIDS AND GASES Russian patent published in 1999 - IPC

FIELD: measurement technology. SUBSTANCE: device has measurement bridge circuit. Additional variable resistor is placed in series into arm of bridge having heating filament-sensor. Another additional filament-sensor having same temperature coefficient as first one is connected in series in another arm of bridge whose one input is linked to first heating filament and power supply source. Bridge is balanced beforehand first for standard then for measured substances. Thermograms are plotted and sought-for thermophysical characteristics are calculated. Proposed device makes it feasible to measure thermal conductivity factor while input and output of additional heating filament are short-circuited and additional variable resistor has zero value. EFFECT: enhanced informativity of method. 2 cl, 1 dwg, 1 tbl