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Hydrological Equipment

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Stage Measurement Potentiometer

Item No.:
3.00 LBS

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The stage sensor consists of a precision, wire-wound 10-turn potentiometer on an aluminum bracket. It is used with various data-recording devices such as data loggers and data-collection platforms. The potentiometer provides an output voltage that increases with rising stage and decreases with falling stage. It requires a precision, switched excitation voltage and is connected to an analog input on the data-recording device. When used with a one-foot circumference float wheel, the range of measurement is 10 feet.

The stage potentiometer, commonly called a "stage pot" was designed as a stage sensor for non-critical applications, with moderate accuracy, where low cost is an important factor. These pots are precision units with a resistance tolerance of ±3% and a linearity of ±0.1 %. With the proper data logger or data collection platform (DCP) setup, and proper wiring and measurement techniques, accuracies of ±0.05 ft. are common. The stage pot does not meet the USGS accuracy requirements of stage sensing for primary records.