A liquid crystal polyester resin comprising 1 to 500 mmol % of a recurring unit derived from 4-hydroxyisophthalic acid andor salicylic acid as a comonomer and 10 to 5,000 ppm in terms of an alkali metal of an alkali metal compound. Read-only requests for information are satisfied from the cache, avoiding the overhead of a network round-trip and the computing overhead of repeating an interaction with the back-end data source. The sensors are preferably electrical contacts that are held spaced from but close to the fuse such that expansion of the fuse caused by detonation causes the fuse to touch the contact, causing an electrical signal to actuate the timer. A valve, to allow flow from an interior of the assembly to a reservoir if needed, is provided.