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With 32 high and low frequency tones to suit a wide range of applications. ATEX and IECEx approved for use in Zones 0 and 20 (Gas and Dust) and is suitable for use in zones 0, 1, 2, 20, 21 and 22. The product should only be connected to the fire alarm system via an approved galvanic isolator or zener barrier. These devices are available from Vimpex along with a suitable enclosure.