Patent ID: 8627711

Claim:
A sensor switch for chemical/composition detection, which comprises a compromisable mechanical restrainer, a biased first member, and a second member, wherein: before compromise, the restrainer can hold the biased first member in a first position, and, upon contact with a target chemical and/or composition, the restrainer is physically compromised by being softened or dissolved such that the biased first member can assume a second position different from the first position to make or break contact with the second member; and the sensor switch operates only by an all-or-none, “open/close” configuration feature such that when the first position provides for the “open” configuration, direct physical contact between the biased first member and the second member is not present, which could be closed by making contact of the biased first member with the second member; and when the first position provides for “close” configuration, direct physic contact between the biased first member and the second member is present, which could be opened by breaking contact of the biased first member with the second member.