title: Hand-held electronic area planimeter.
abstract: The focus of this paper is to describe the development and fabrication of a portable hand-held electronic area planimeter to measure wheal areas during dermatitis assays. The planimeter straddles over the wheal and the scientist traces the wheal's perimeter using an optical beam splitter/cross-hair and a miniature x-y table. Transducers connected to the x-y table and an electronic circuit performs the area integration and displays the data on a digital panel meter. The apparatus permits noncontact measurement of areas up to 1000 mm2 with a resolution of 1 mm2.
authors.affiliation: Merck Research Laboratory, Rahway, NJ 07065, USA.
authors.forename: G S
authors.initials: GS
authors.lastname: Kath
authors.forename: C H
authors.initials: CH
authors.lastname: Chang
authors.forename: M
authors.initials: M
authors.lastname: Kniazuk
mesh_terms: D000818:Animals; D002138:Calibration; D017449:Dermatitis, Allergic Contact / Q000175:diagnosis / Q000662:veterinary; D003880:Dermatology / Q000295:instrumentation*; D004283:Dog Diseases / Q000175:diagnosis; D004285:Dogs; D004581:Electronics / Q000295:instrumentation; D004867:Equipment Design / Q000706:statistics & numerical data; D055095:Optics and Photonics / Q000295:instrumentation; D005423:Siphonaptera; D013499:Surface Properties; D014159:Transducers; D014730:Veterinary Medicine / Q000295:instrumentation*