Apartment heating distribution counter - uses photo or thermosensitive emulsion plate mounted on heater indicating percentage share of total heating used

摘要

the heating distribution counter for a number of occupants sharing heating expenses employs photo or thermosensitive emulsion, whose density is altered by action of heating. These counters are located in contact with heating elements and expenses are calculated on a percentage basis with respect to surface area and relative density of affected emulsion in a time period. A photo or thermosensitive emulsion on a support such as paper or glass is mounted in a protective box of a good heat conducting material. The box is fixed to the heating element by gluing or by clips and has a corer of the same material or of plastic. A protective wire maintains the box closed and prevents fraud.