The Pimple Detection Device is a modified helmet designed to wipe out pimples before they happen with a very miniature heat seeking missile.  Once the missile destroys a pimple, it leaves behind a Band-Aid.
When Egon Spengler's age was reversed after an accident involving the Clock Ghost, he invented a Pimple Detection Device shortly after. He demonstrated it at breakfast and used it on himself. Not garnering the accolade he wanted, Egon stormed off.
- On page 10 of Ghostbusters Issue #14, the device makes a non-canon cameo on the table.
- ↑ Egon Spengler (2009). The Real Ghostbusters - "Three Men and an Egon" (1989) (DVD ts. 07:08-07:17). Time Life Entertainment. Egon says: "Hey, check out my latest detection device. It's designed to search out and destroy pimples before they cause nasty unsightly blemishes."