EVENsirens

EVENsirens
EVENsirens' logo.
Headquarters	360ο χλμ. Ε.Ο. Αθηνών – Θεσ/νικης, Omorfochori 415 00, Greece
Products	Outdoor warning sirens

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

An SA-30 in Piraeus, Attica. This siren replaced a Siemens-Schuckert L135.

The wireless remote-control panel of an SA-30.

The "central unit" of an 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 larger S-60 are the most popular sirens that are sold by the company. The S-30 is a very simple siren, consisting of a bare 50/60 Hz motor underneath a 10-port rotor and stator. Mesh screens are wrapped around the stator ports and intake to prevent debris or any other unwanted objects from entering the siren. S-30s can be differentiated from the more powerful S-60 by the color of the rotor; S-30 rotors are red, while S-60 rotors are white. 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. 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. The S-60 is a very simple siren, consisting of a bare 50/60 Hz motor underneath a 10-port rotor and stator. Mesh screens are wrapped around the stator ports and intake to prevent debris or any other unwanted objects from entering the siren. S-60s can be differentiated from the less powerful S-30 by the color of the rotor; S-60 rotors are white, while S-30 rotors are red. 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. 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.