Denzel Washington on screen and stage. Denzel Washington is an American actor who made his feature film debut in Carbon Copy (1981).[1] In 1982, Washington made his first appearance in the medical drama St. Elsewhere as Dr. Philip Chandler.
Report Abuse. Sprinklers do not detect smoke. Some operate by a fuse that melts, from the heat of a fire, to release water, others operate by a sudden drop in water or air pressure in the pipe which is controlled by a alarm system, when activated.
An excellent example of this is the household smoke detector. There are two common types of smoke detector in most countries. Photoelectric-type smoke detectors detect smoke using an optical sensor, whereas ionization-type smoke detectors use an ionization chamber containing radioactive material (see Fig. 1).