Elektror FS

**Type of siren** | Omnidrectional Electromechanical

The **FS** is a series of small, vehicular sirens produced by Elektror Airsystems, intended to be mounted on a wide variety of vehicles. Introduced sometime in the 1940s, very few units remain, and little is known about them.

## History and Design

The FS series was introduced sometime in the early 1940s. They were intended as a vehicular siren for motorcycles, cars, and trucks as well as boats by authorities. All the sirens in the lineup follow the same basic format of having a small 7-port rotor and stator driven by small motor encased in a bullet shaped housing, with a grille covering the front of the siren. There were 3 main models in the series, these being the:

### FS 00

The **FS 00** is the smallest siren in the FS series. It is a relatively simple siren at its core being 7-port and driven by a small 12 V motor encased in a bullet shaped housing. The front half of the cover is one color, while the back half is another, with the exact colors depending on the buyer's request. A grille with 4 cowls covers the front of the siren, and a screen covers the ports.

The siren is attached to a swivel mount which allows it to be positioned a certain angle. It has a triangular base with 3 holes in each corner, allowing for the siren to be mounted. Some units are known to have a conical intake between the bottom of the stator and the front of the motor cover, though most lack it. Skirted units are an incredibly rare site, with only a few known units being one. It is likely that either the option to include a skirt was discontinued early on or that it wasn't popular among buyers.

Sometime between the siren's introduction in the 1940s and 1992, the FS 00 would be redesigned. The siren would be radically simplified, with the siren's motor cover now being trapezoidal and the ports now having 4 finger guards going across them, instead of a screen. The mount would also be changed, with the siren now being able to swivel 360°, thanks to a small nut located below the siren and above the stand. The siren would also receive a new grille with a slightly easier to produce design. Not many of these newer units exist today, as they were introduced at the tail end of the series' lifespan. Very few FS 00s exist today, with most, if not all, being in the hands of collectors.

### FS 1

The FS 1 is essentially a sub-series within the FS series. It consists of all the sirens in the FS series with the "1" prefix. All of the FS 1 sirens use the same general base, with the only changes being the port ratio or the addition of a flashing light attached to the front of the stator.

#### FS 1a

The **FS 1a** is the midrange option in the FS series and are essentially a larger version of the FS 00. The FS 1a is relatively similar to its smaller counterpart, being 11-port and driven by an either 6, 12, or 24 V motor which is encased in a bullet shaped motor cover. An 8-port option was allegedly also available. Like the option to include a skirt on the FS 00, if it did exist at one point, the 8-port variant was either discontinued early on or not very popular, as very few 8-port units exist.

The FS 1a's motor cover is slightly narrower than that of the FS 00's. The spaces in-between the grille protecting the stator are also smaller. Another design change would be to the siren's stand, which's base would become slightly larger. The final one would be the FS 1a's grille having an extra cowl added to it. This is largely where the differences end. This design would likely be used up until the discontinuation of the series, as there is no evidence of the FS 1a getting redesigned.

The FS 1a is slightly more common than the FS 00, but not by much, as only a handful of units exist today, with most, if not all, being in the hands of collectors.