Gusdorf J
Bibliographic info:
Air Infiltration Review, Vol 12, No 4, September 1991, pp 1-3, 2 figs. #DATE 00:09:1991 in English

Accurate measurement of the positions of windows, skylights, vents, dampers, etc. has always been a problem for researchers. Often open/closed switches are used which do not indicate the degree of opening which has occurred. The use of Hall-Effect sensors to measure such positions was first proposed for monitoring residential passive air inlets.