One of the successes for the Spero Group has been its development, and continued enhancement, of the SL2000 harsh environment telemetry system. Originally developed for fire detection, its versatility has seen it being used for a multitude of applications, including fire detection, but extending to environmental and utility monitoring as well as monitoring of conveyor belts. Having completed installations of the SL2000 system at all major local gold mines, the new focus for Spero will be the coal and platinum mines. Note that the Spero Group also offers a wide range of environmental sensors specifically designed for harsh underground conditions to complement the SL2000 telemetry system.
SL2000 is based on the Lonworks protocol, acceptance of which is growing rapidly in the mining industry. Spero has for many years represented the French company Oldham, which supplies a comprehensive range of gas and flame detectors for the mining industry. These devices tend to be based on the older 4-20 mA output, traditional to this industry, but Spero was recently contracted by Oldham to develop Lonworks interfaces for some of their gas detectors. This demonstrates the confidence that Oldham has in the local company's engineering strength in this field and Spero hopes that this international demand for its capabilities will continue.
The following applications can be considered for a SL2000 system:
* Process control (eg, stope isolation, booster fans, mud presses).
* Ore handling (eg, conveyor control and monitoring, weigh bridges, silos).
* Safety and rescue (eg, refuge bay conditions).
* Voice commununications (compatible with Grintek's bandolier radio).
Some of the existing users include: Great Noligwa Mine, Moab Khotsong Mine, Tau Lekoa, Kopanang, Bambanani Mine, Blyvooruitzicht Mine, Target Gold Mine, Kloof Shafts 3, 4, 7, Placer Dome, ATOK, ARM Shaft 2 and 4, East Driefontein Shafts 1 and 5, Tweefontein, Douglas, Modikwa.
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