annunciator


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annunciator

[ə′nən·sē·ād·ər]
(engineering)
A signaling apparatus which operates electromagnetically and serves to indicate visually, or visually and audibly, whether a current is flowing, has flowed, or has changed direction of flow in one or more circuits.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

annunciator

1. A signaling device, usually electrically operated, that emits an audible signal and/or a visual indication under selected circumstances; for example, it may sound an alarm in the case of fire or unauthorized entry.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.

annunciator

annunciatorclick for a larger image
Indicator flag in a gyrocompass that alternates between a dot and a cross and does not settle on either when AC (alternating current) supply is on. If the compass drifts, then either the dot or the cross will be visible, and the compass will not annunciate.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved
References in periodicals archive ?
Salco Industries of Pensacola, Florida, has introduced the Door Monitor Annunciator System CS-2000, which monitors and displays the real-time status of up to 80 doors in a compact modular rack design.
“ASE has long been committed to developing world class communication products including ASE2000, Bell 202 Modems, 'SPT' Protocol Translators, and 'SAM' Substation Alarm Annunciators. We are enthused to be part of the Kalkitech family who, like us, extend the frontiers of communication protocols and solutions for the Smart Grid.
The units also include four annunciators (gross, net, pounds and kilograms) and decimal point indication.
INTRODUCED in the 1950's Alarm Annunciators have become a common sight in many industrial applications around the world and they remain one of the clearest methods of informing plant operators that a process has gone beyond set limits.
DSI also offers door alarms, annunciators, pushbuttons, key switches, and mantrap systems.
Applications include telecommunications, switching systems, elevators, automotive instrument panels, annunciators, indicators and use in miniature lighted pushbutton switches.
AN-6100B Series alarm annunciators boast a range of performance features and custom configurations.
CEMStation options include flow limit shut-off valves, pressure relief valves, pressure switches and annunciators for remote alarms and custom distribution panels.