Patent ID: 7061245

Claim:
A capacitive sensor for a coil-on plug ignition testing apparatus, comprising: a first portion of the capacitive sensor having at least one first engagement member projecting outwardly therefrom and a second portion of the capacitive sensor engageable with the first portion and configured to slide relative to the first portion, the second portion having at least one second engagement member projecting outwardly therefrom, at least one of the first portion and the second portion comprising a capacitive element; a biasing element disposed between the first portion and the second portion to bias the first portion toward the second portion and to maintain the first portion and second portion in a contracted state; and an electrical connector electrically connecting the first or second portion forming the capacitive element to an output terminal, wherein at least one of the first portion and the second portion has a substantially planar base, and wherein the first portion may be translated relative to the second portion against a bias of the biasing element to an expanded state for securement of both the first and second portions to a coil-on plug housing.