The LHi 907 pyroelectric infrared-detector is a special design for motion control in ceiling mount applications. It includes a pyroelectric ceramic with a round sensitive element connected to one FET in source follower connection, and a compensational second element.
This detector is available in TO-5 housing with a standard infrared filter. It offers low noise, and special field of view and capture for ceiling mount applications.

Round element design with compensation
Single FET output
Designed for ceiling mount applications