title: An inexpensive alternative to commercial infrared sensors.
abstract: Infrared sensors, commonly used to detect the position of an animal subject in a maze or runway, are reliable and unobtrusive, but expensive if purchased commercially. I describe a functional equivalent to commercial sensors, available at a fraction of the cost. With only a few inexpensive components and the ability to solder, an investigator can create inexpensive sensors that work with commonly used commercial equipment.
authors.affiliation: Department of Psychology & Neuroscience Program, Albion College, Albion, MI 49224.
authors.forename: W Jeffrey
authors.initials: WJ
authors.lastname: Wilson
keywords: behavioral neuroscience; infrared detectors; photodarlingtons