Sentry 95

ACA Sentry 95 Klaxon SS6
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Company	Alerting Communicators of America Klaxon Signals
Produced	1968-1970s
Type	Omnidirectional Electromechanical
Sound output	95 dB @ 100 ft
Horsepower	1 hp
Voltage	120 V AC/DC

The Sentry 95 was a short-lived siren that was made by Alerting Communicators of America (ACA). The Sentry 95 is a rebranded version of the Klaxon Signals SS6, with the only difference between the two being the Sentry 95 having a custom rain shield included. It is unknown whether or not this siren was ever produced in the first place by ACA, as none have ever been documented.

History and Design

The Sentry 95 was introduced around 1968 alongside ACA's other sirens, and was spotted as late as 1970 in ACA's catalogue. The Sentry 95 is a rebranded Klaxon Signals SS6 siren, as ACA entered a partnership with the UK-based Klaxon Signals to allow ACA to rebrand and sell the SS6. The Sentry 95 is a very small industrial siren, with a 5/6 dual tone port ratio and a range of 95 dB at 100 ft. The Sentry 95/SS6 was intended for small coverage gaps, industrial sites and fire stations, but was so weak that few customers wanted them and there were much better alternatives such as the Federal Signal Model A and Model L.

It used a very small chopper inside of a stator with round port holes, with the 1 hp AC motor being located below it. The chopper is dual-sided, with air being drawn in from above and below the siren. The stator is little more than a small rounded sheet of metal with circular cutouts acting as the stator, with an integral intake on top. The motor cover houses the motor, the stand, as well as a conical cutout below the chopper to project the sound from the lower intake. The top intake's diameter is around 7.5 cm (3 inches), the stator diameter is around 15.7 cm (6.181 inches), the rotor diameter is around 6 inches. (15.24 cm). The entire height of the siren is 30.5 cm (exactly 1 foot), and the base's diameter is roughly 23.6 cm (9.3 inches). Courtesy to Alarm Museum for the proper measurements.

According to what is pictured in ACA's 1970 catalogue, the Sentry 95 was redesigned, using a motor-over-rotor configuration. The siren took in air from the bottom, held up by 4 supports in a similar fashion to the Screamer 105. The motor cover was integrated into the rainshield as well. It is unknown how long this version was produced for, but none are known to exist today. The SS6 itself is very rare, with about 9 units currently known to exist. As of now, the Sentry 95 is extinct and no units survive to this day, if any were ever made or sold in the first place. Not much else is known about these relatively obscure sirens.