Description: The bridge is an ideal mounting platform for non-contact solution sensors. The sensor must be placed directly over the water where it can be expected to detect the water level during minimum and maximum streamflow events. The data logger, battery and other electronics are typically placed in a secure enclosure that is mounted to the bridge. The bridge mount should be in a location that is easy to access for maintenance but difficult to vandalize. Quite often, contact technologies are also mounted to bridges. Silling wells, bubbler lines, and transducers can all be mounted from a bridge. If a bridge is available, non-contact (radar or ultrasonic) sensors would be the sensor of choice. Bridges also offer an additional benefit of training the river under the bridge, thus offering relatively stable river banks that help channel the water.
Costs USD Lower: Cost depends on in country labor rates
Costs USD Upper:
Accessories: ACCESSORIES
Advantages: Bridges generally provide a good control for water that is created by the water that is forced to flow under the bridge.
Disadvantages: If bridges are top narrow for the flow, backwater affects may be introduced. Bridge mount system expose the radar sensor to curious onlookers, which may increase susceptibility to tampering. Bridge piers can disrupt river flow, so measurement systems should be moved away from piers to the extent possible.
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