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.

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.

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.
References in periodicals archive ?
The new unit maintains a number of features from the current DD-40NTS, such as a "universal" power supply capable of operation on either dc or ignition input voltage, as well as the ability to operate the annunciator logic module for an extended period on internal backup battery power.
Table 22: World Recent Past, Current & Future Analysis for Fire Alarm Devices by Product Segment- Annunciators, Notification Devices, and Manual Pull Stations Independently Analyzed with Annual Sales Figures in US$ Million for Years 2000 through 2010 (includes corresponding Graph/Chart) II-52
The system installation requirements include available physical space for mounting, a Mark III with BCD port or similar annunciator, a power supply and a telephone connection or cellular phone with accessory connection capabilities.
ASE has long been committed to developing world class communication products including ASE2000, Bell 202 Modems, SPT Protocol Translators, and SAM Substation Alarm Annunciators.
Options include remote annunciators, contact-by-zone features, and printer interface module.
The components include various annunciators, fillable shapes (with a selection of panels and bezels), seven segment displays, pipes, valves, tanks, pumps, meters, switches, buttons, sliders, scales, and strip charts.
by code and the Klamath Fire Marshal) annunciators, an interface with metasys to shut down the building supply and return fans and interposing relays to shut down the room s standalone HVAC units, integrate, if feasible, with the existing manual single action 3 (by floor) pull station alarm system, and all other equipment necessary for a complete operational system.
Its services include security technologies, computer-aided dispatch and automatic vehicle locator systems, wireless communications, in-vehicle annunciators, revenue and fare collection systems, network infrastructure and other transportation electrical and electronic subsystems.
The Fire Systems Catalog highlights fire alarm control panels and peripherals, including annunciators, detectors, pull stations, horns, strobes, and speakers.
This suite of JavaBeans will create meters, strip charts, annunciators, active input devices (buttons, knobs, sliders), bar charts, seven-segment displays, and much more.
NOTIFIER also manufactures peripheral devices, including manual pull stations, intelligent and conventional detection products, signaling devices, high capacity digital communicators, and annunciators.
The suite of JavaBeans components includes meters, strip charts, annunciators, active input devices (buttons, knobs, sliders), and seven-segment displays.