A Sounder Beacon is an alarm which has both audio and visual properties and which is usually used in emergencies, such as fire alarms for evacuations or on emergency vehicles to alert road users. The Sounder emits a loud audible alarm to raise an alert to a hazard, while the Beacon provides a clear visual alert, usually by a flashing indicator light through a coloured lens. Conventional Sounder Beacons are often used in commercial and industrial sectors. Typically, the audio range of a sounder beacon will be between 5 and 15 decibels (dB (A)) above the ambient noise level.

The audio and visual alarms in Sounder Beacons are integrated, making it an enhanced warning device. They can come with different tones incorporating high frequencies, low frequencies and industry-standard frequency patterns. They have different coloured lenses to give an improved warning signal, and for a more enhanced visual alert, we also have Flashing Sounder Beacons. Some Sounder Beacons are equipped with volume control and tunable features. Beacons may be constructed with halogen bulbs similar to those used in xenon flashtubes or LED floodlights.

At RS, we offer a wide range of robust, high-quality Sounder Beacons from industry-leading brands including Clifford & Snell Werma Eaton Klaxon and our own brand RS PRO