The LHi 906 pyroelectric infrared-detector is a special design for motion control in ceiling mount applications. It includes a pyroelectric ceramic with 2 sensitive elements in round shape connected to one FET in source follower connection.
This detector is available in TO-5 housing with a standard infrared filter. It offers low noise, special field of view and capture for ceiling mount applications.

Banana ( Yin Yang) element design
Single FET output
Designed for ceiling mount applications