Flow & Current Meters

Swoffer 2100 Current Meter

This easy to use, robust current meter consists of a handheld digital display connected to a fiber-optic sensor and is available with 3 rod configurations - a top set wading, combination, and Telescoping rod. Top set wading rods are designed to be used while wading in streams, waterways and channels. Combination rods are designed to measure flows in faster, deeper water or from low bridges or a boat. Telescoping wands which are supplied with the sensor on an short boom are designed for reaching shallow and partially obstructed channels such as sewers.

The basic principle of the Swoffer fiber-optic sensor is simple and unique: Multiple bundles of fiber-optics, assembled into a propeller driven rotor, gate a beam of infrared light from a photo diode to a photosensitive transistor producing electronic pulses. These pulses, generated by the propeller rotor over a precisely measured amount of time, are directly proportional to water velocity. The cable to the display can be extended to over 1000ft. All rotor parts are easily replaceable in the field and spares are provided with every new instrument.

Average water velocity in both m/sec and ft/sec can be viewed on the standard 2100 Handheld Display which is also used to calibrate the fiber-optic sensor. Also available is the Model 3000 Datalogging Indicator which allows the operator to input all measurement data usually kept on a clipboard while crossing a stream. It figures the flow (Q) and can be downloaded to a PC with the included software. Specifications