Rugged contact-based sensor for monitoring maximum scour depth around bridge piers and abutments.
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Rugged contact-based sensor for monitoring maximum scour depth around bridge piers and abutments.
The Geolook G93-800C Magnetic Collar is a reliable, mechanical-electronic hybrid sensor designed to measure the depth of scour (sediment erosion) around underwater structures. It is specifically engineered to track the 'maximum scour depth' reached during high-flow events or floods. The system consists of a stainless steel pipe installed vertically into the riverbed, equipped with internal magnetic reed switches. A weighted magnetic collar sits around the pipe at the initial bed level. As the riverbed erodes (scours), the collar slides down the pipe by gravity. The internal sensors track the collar’s lowest position, providing a definitive record of the erosion depth even after the scour hole has been partially refilled by sediment during lower flows.
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One of the greatest dangers in bridge engineering is 'refilled' scour. During a flood, the fast-moving water digs a deep hole around a pier. As the flood recedes, the water slows down and drops new sediment into that hole.
A post-flood inspection might show the riverbed is back to its original level, hiding the fact that the pier's foundation was recently compromised. The G93-800C solves this because the magnetic collar stays at the *lowest* point it reached, revealing the true maximum scour depth to the engineers.
The sensor pipe is typically attached to the upstream face of a bridge pier using heavy-duty brackets or driven into the riverbed using a specialized mandrel. The internal wiring is hermetically sealed, allowing the signal to be sent to a Geolook GL-DL series data logger mounted safely on the bridge deck.
Unlike ultrasonic sensors that can be confused by debris or 'cloudy' water (high turbidity), the Magnetic Collar is a contact-based system. It does not rely on sound waves. It relies on gravity.
As the sediment supporting the collar is washed away, the collar simply falls. It is a foolproof method that works in the muddiest, most violent flood conditions where electronic 'non-contact' sensors often fail.
Scour is the leading cause of bridge failure worldwide. By integrating the G93-800C into a real-time monitoring network, bridge authorities can set 'Critical Depth' alarms. If the collar drops to a depth that threatens the foundation, the system can automatically trigger lane closures or speed restrictions, potentially saving lives.
One of the greatest dangers in bridge engineering is 'refilled' scour. During a flood, the fast-moving water digs a deep hole around a pier. As the flood recedes, the water slows down and drops new sediment into that hole.
A post-flood inspection might show the riverbed is back to its original level, hiding the fact that the pier's foundation was recently compromised. The G93-800C solves this because the magnetic collar stays at the *lowest* point it reached, revealing the true maximum scour depth to the engineers.
Unlike ultrasonic sensors that can be confused by debris or 'cloudy' water (high turbidity), the Magnetic Collar is a contact-based system. It does not rely on sound waves. It relies on gravity.
As the sediment supporting the collar is washed away, the collar simply falls. It is a foolproof method that works in the muddiest, most violent flood conditions where electronic 'non-contact' sensors often fail.
The sensor pipe is typically attached to the upstream face of a bridge pier using heavy-duty brackets or driven into the riverbed using a specialized mandrel. The internal wiring is hermetically sealed, allowing the signal to be sent to a Geolook GL-DL series data logger mounted safely on the bridge deck.
Scour is the leading cause of bridge failure worldwide. By integrating the G93-800C into a real-time monitoring network, bridge authorities can set 'Critical Depth' alarms. If the collar drops to a depth that threatens the foundation, the system can automatically trigger lane closures or speed restrictions, potentially saving lives.
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