Isolator

n. one who or that which secludes, one who or that which isolates; one who or that which separates, one who or that which removes; one who places in quarantine

Isolator may refer to:Isolator (EP), by Two Hours TrafficIsolator switch, used in electrical circuitsIsolator, an electrical component in which one port of a three port circulator is terminated in a loadOptical isolator, a directional device in optical fiber communicationsInvestigative isolator, a Russian pre-trial or remand prison, also known as a SIZO
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n. isolator, one who secludes, one who isolates; one who places in quarantine

n. insulator, something which blocks or retards the passage of heat (or electricity, sound, etc.)

(n.)
One who, or that which, isolates.