Tide gauges measure tidal fluctuations, instantaneous water depths and long-term water depth averages in coastal areas. Although tide gauges have been in use for many decades, advances in sensor technology have increased both the available options and measurement accuracy. Automated monitoring systems can deliver the data needed to analyze long-term trends and develop both near and long-term forecasts.
Tide Gauge Measurements
Typical Tide Gauge System
Tide gauge systems may integrate various sensor types for measurement of mean water levels, wave heights and other factors like weather conditions. They are mounted on piers, docks or purpose-built structures and incorporate data logging systems with wireless, remote telemetry.
While systems have historically utilized mechanical float sensors or sounding tubes, NexSens tide gauge systems incorporate modern sensor technology such as the VEGA VEGAPULS C 23 radar level sensor, a non-contact water level instrument that requires little to no maintenance. Sensors are connected to the X2 data logger, the central component of NexSens automated tide gauge stations. The X2 transmits real-time sensor data wirelessly, most commonly via cellular telemetry, but Iridium satellite telemetry is available for stations in remote areas with little connectivity.
Multiple sensor ports on the X2 allow for simultaneous connection of several sensors. A station could, for example, incorporate a pressure transducer like the Seametrics PT12 for redundant water level measurement. Other compatible sensors include meteorological sensors for measurement of weather factors like air temperature, barometric pressure, and wind speed and direction, ADCP current meters and profilers, and multi-parameter water quality sondes.
Flexible mounting options for the X2 simplify installation on structures. Power is typically supplied with SP-series solar power packs or an AC adapter if mains power is available. Telemetered data is received on the WQData LIVE web datacenter platform. WQData LIVE has a suite of data management tools and sends alerts via email or SMS text message when defined thresholds are exceeded.
Contact a NexSens Applications Engineer today to discuss your tide gauge application.
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