EVENsirens
| EVENsirens | |
 EVENsirens' logo. | |
| Headquarters | 360ο χλμ. Ε.Ο. Αθηνών – Θεσ/νικης, Omorfochori 415 00, Greece |
|---|---|
| Founded | 1998 |
| Products | Outdoor warning sirens |
| Website | sirens.com.gr |
EVENsirens is a Greek brand of outdoor warning sirens by EVENTECH in Omorfochori, outside the city of Larissa, Thessaly. EVENsirens competes with VILMA Motors and Comtel Manufacturing regionally; despite the company only recently entering the siren business, EVENsirens are one of the most common sirens in the country, only second to the VILMA55, and are often replacements to the older mechanical sirens in Greece that date back to World War II.
Design
SA-30
The SA-30 is an omnidirectional electronic siren produced by EVENTECH under the EVENsirens brand. The SA-30 is EVENsirens' flagship product and is advertised as an alternative to conventional mechanical siren, although it is mostly outshined by the S-30 and S-60 as mechanical sirens have a much larger foothold in the Greek market. The SA-30 is derived from Telegrafia's PAVIAN, utilizing the same thin rectangular horn design constructed out of aluminum. The PAVIAN itself was inspired by HÖRMANN's well-renowned ECN sirens. The ECN's horn design was licensed to several companies during its production (and in some cases copied), resulting in many other sirens looking similar, if not identical to the ECN series, with the only changes being the logos on the sides of the horns. Some SA-30 horns have Telegrafia wordmarks on the sides of the horns, although this was seemingly phased out recently. A mesh screen covers each opening of the horns, a feature unique to SA-30 sirens. The speakers attach to a galvanized steel tripod mount via a bracket attached to the throat of the horn and can be configured in a variety of ways.
By default, they are arranged in a way that the sound is propagated omnidirectionally, with the principle being based on gap diffraction, also called Huygens' principle. The sirens are powered by 150 W drivers, with cube-shaped enclosures behind each horn shielding each driver from the elements. Only 2 horn configurations are supported for the SA-30, with no higher or lower counts offered. The SA-30 is powered by a 220 V AC "central unit" control panel with a 200 W RMS amplifier, a tone generator, and a 116 W low voltage power supply. A wireless remote-control panel is also offered by EVENTECH which can active a variety of signals. Voice messages are able to be stored through the central unit and a live PA function for the siren is also offered. The SA-30 is integrable with the PAM–PSEA siren network and is OTE SAT–ISS radio activation capable. The SA-30 is programmed to monitor the condition of the amplifiers and tone generator and identify faults in any of the siren's components. A weatherproof cabinet made of power-coated steel houses the central unit's components. EVENTECH rates the SA-30's output at 107 dB at 30 m (100 ft).
S-30
The S-30 is an omnidirectional electromechanical siren produced by EVENTECH under the EVENsirens brand. Despite EVENTECH pushing the electronic SA-30 far more than the mechanical EVENsirens offerings, the S-30 and more powerful S-60 are the most popular sirens that are sold by the company, with the S-30 in particular being more common. The S-30 is a very simple siren, consisting of a bare 50/60 Hz motor underneath a 10-port rotor and stator. The stator and motor are painted blue by default, while the rotor is painted either red or white. S-30s and S-60s only differ in motor horsepower and are otherwise identical. Mesh screens are wrapped around the stator ports and intake to prevent debris or any other unwanted objects from entering the siren. A large clear plexiglass dome, which is intended to protect the siren from rain, is fixed above the siren by 3 support legs which are bolted to the top of the stator. The mounting legs hold the dome above the stator much farther up than necessary, and as a result it is not very effective in shielding the siren from the elements. Some earlier S-30 units have triangular shrouds which are constructed out of metal and sit lower than standard. The entire siren rests upon a small cylindrical base below the motor with lugs that allow the siren to be bolted to a flat surface. The S-30 was built to mimic the VILMA NEVA/VILMA55 in both appearance and sound, which was a popular model that became the standard siren of Greece after its introduction. These sirens can commonly be atop rooftops, either fixed on tripods or utilizing the mount of the older siren that it replaced. The S-30 enjoys a large amount of success in Greece and is a formidable competitor to VILMA's VILMA55.
S-60
The S-60 is an omnidirectional electromechanical siren produced by EVENTECH under the EVENsirens brand. Despite EVENTECH pushing the electronic SA-30 far more than the mechanical EVENsirens offerings, the S-60 and smaller S-60 are the most popular sirens that are sold by the company, with the S-60 in particular being less common. The S-60 is a very simple siren, consisting of a bare 50/60 Hz motor underneath a 10-port rotor and stator. The stator and motor are painted blue by default, while the rotor is painted either red or white. S-30s and S-60s only differ in motor horsepower and are otherwise identical. Mesh screens are wrapped around the stator ports and intake to prevent debris or any other unwanted objects from entering the siren. A large clear plexiglass dome, which is intended to protect the siren from rain, is fixed above the siren by 3 support legs which are bolted to the top of the stator. The mounting legs hold the dome above the stator much farther up than necessary, and as a result it is not very effective in shielding the siren from the elements. Some earlier S-60 units have triangular shrouds which are constructed out of metal and sit lower than standard. The entire siren rests upon a small cylindrical base below the motor with lugs that allow the siren to be bolted to a flat surface. The S-30 was built to mimic the VILMA NEVA/VILMA55 in both appearance and sound, which was a popular model that became the standard siren of Greece after its introduction. These sirens can commonly be atop rooftops, either fixed on tripods or utilizing the mount of the older siren that it replaced. The S-60 enjoys a large amount of success in Greece and is a formidable competitor to VILMA's VILMA55.
S-3, S-6
The S-3 and S-6 are directional hand-crank sirens produced by EVENTECH under the EVENsirens brand. It is advertised as an alternative to the conventional electromechanical or electronic sirens in areas where power may not be readily available. The S-3 and/or S-6 are not creations of EVENsirens, but rather rebadged versions of Taizhou Lion King Signal's LK-120, similar to VILMA's VILMA55X which is based off the same siren. The LK-120 is a hand-crank siren which is 8 port and utilizes a retractable crank behind the stator to drive the rotor. Finger guards are present on the stator and a circular plate with openings surrounds the front of the stator to prevent injury or debris from entering the siren. The openings converge at the very center of the plate, forming a flower-like shape. A small handle which connects to the stator and gear enclosure in front of the crank allows the siren to be carried with relative ease. An L-shaped bracket bolted to the bottom of the rear end of the stator connects the siren to an assembly comprised of several beams which are arranged in a trapezoidal shape. This assembly serves as the siren's base, although the base assembly can be separated from the stator or folded inwards through use of a small crank below the bracket to better transport the siren as a whole. It is unknown what the difference between the S-3 and S-6 are, as the websites only show 1 model of siren (the LK-120) under their "Manual Sirens" product category; whether this is an S-3 or S-6 is unclear.