PERMAFROST METER Russian patent published in 2024 - IPC G01K5/02 G01K11/06 G01K13/00 G01W1/00 

FIELD: measuring.

SUBSTANCE: invention relates to metrological instruments and is intended for field measurements of depth of snow cover and depth of freezing and thawing of soils. Essence of invention consists in creation of tool for measurement of depth of snow cover and depth of freezing and thawing of soil without contact with previously installed devices, that is without extraction of flexible hose from casing, without excavation of snow in measurement zone, as well as no need to pull out any probes and use of additional measuring tools. Proposed device consists of an external casing tube with a closed bottom, with a vertical slot and a snow gauge scale, in the upper part of which there is an additional internal tube closed from above, with a viewing slot, a soil freezing scale and a process window. Inside the outer casing and inner tubes there is an assembled flexible hose. It is partially filled with coloured non-freezing liquid and is made of upper and lower parts connected by a bushing located inside an elastic ring-shaped plug. Upper part of the hose, which is not tightly closed from above with a cover, is made transparent, and the lower part, which is closed from below with a plug, is elastic. Under the vertical groove, at the level of the soil surface, in the outer casing there is a drain hole closed on the inner side with an elastic ring-shaped plug.

EFFECT: proposed device allows, without digging out snow, to visually record the level of snow cover on a snow-measuring scale and to determine its freezing and thawing on a separate scale without disturbing the thermal mode on the surface of the soil, which is convenient in operation with observing the quality of research.

1 cl, 1 dwg