Wireless sensors plumb the depths
An
Electrosense Technologies product story
Edited by the Engineeringtalk editorial team
Dec 25, 2003
Aquagauge water level sensors were developed to provide an ultra-low-cost method of continuous water level monitoring for depths up to 10m.
Aquagauge water level sensors were developed to provide an ultra-low-cost method of continuous water level monitoring for depths up to 10m.
Offering a resolution of a few millimetres, the product range covers a variety of models including systems with data-logging capabilities using either a PC or PDA interface.
The sensors operate by measuring the dielectric properties of an antifouling polymer- coated cable immersed in water.
Each sensor contains a microprocessor, preprogrammed with calibration values matched to the dielectric signatures of the above water and underwater sections of the cable.
The microprocessor analyses the signal and computes water level every few seconds.
The level, and temperature within the transmitter case, are sent either wirelessly by RF transmission or serially via wires to the data display.
Rainwater and seawater produce virtually equivalent results and water containing suspended sediments, organic matter and most other commonly encountered noncorrosive contaminants, can usually be monitored without problems.
The units are simple to install, manufactured from low maintenance materials and are sludge- and freeze- tolerant.
Aquagauge devices can be used in water tanks, irrigation channels, reservoirs, lakes, rivers, groundwater, seawater etc.
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