Innovative vibration monitoring system moves to predictive maintenance www.gotoSAGE.com Tunnels around the world are fitted with jet fans and sensors that clear and monitor fog and smoke. They are especially important in peak hours or during emergencies such as bushfires. These jet fans can be costly to replace when they fail, so a sound maintenance program is a must to ensure longevity. The twin Heysen Tunnels, located on the South Eastern

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