FIELD: engines and pumps.
SUBSTANCE: flow measurement device includes measuring element (1) in the form of a rod with circulated fluid (22) with one light guide (4) and at least with two electric heating elements (5a, 5b) adjacent to light guide. Heat flows from heating elements are opposite and depending on fluid (22) flow direction are correlated with flow direction to various degree. Light guide (4) includes at least one fibre Bragg grid (13). Unit (23) determines fluid (22) flow direction on the basis of evaluation of impact on electromagnetic wave directed to light guide of various temperature of light guide in places of Bragg grids (13).
EFFECT: enlarging functional capabilities and possibility of measuring the flow velocity and direction with one measuring element.
22 cl, 10 dwg
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