Elfab’s Atex-approved, non-invasive and reusable Integral Flo-Tel sensor is now fitted as standard to Opti-Gard, Safe-Gard, Posi-Gard, Vac-Gard, Arma-Gard, Bursting Panels, and both Flat and Domed Composite Discs. Unlike most alarm systems, which are activated by the flow created after a bursting disc has operated, Integral Flo-Tel is installed on the vent side of bursting discs and is activated by the operation of the disc itself. During operation, a magnet arcs away from its rest position, removing the magnetic field from the sensor, and comes to rest in a position which no longer influences the sensor. This causes the sensor to switch to its fail-safe condition of an open circuit and a latched alarm condition is the result.
After operation, the bursting disc, complete with magnet, is the only part of the assembly that needs replacing. The sensor probe can be easily withdrawn from the bursting disc holder, prior to the holder being removed from the flange, and does not need to be electrically disconnected from the control system. Integral Flo-Tel is IP 65-rated and suitable for use in both chemically aggressive and hygienic environments.
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