2.1.3 Shaft Encoders
Shaft encoders are deployed inside of stilling wells and consist of five major
components: a pulley and shaft, an encoder which counts and interprets the shaft
rotations, a float, a cable, or tape which passes over the pulley and is connected to
the float on one end and a counterweight on the other end, and a counterweight
(Fig. 3). As the water level in the stilling well changes, the float goes up and down
which in turn rotates the pulley and the shaft. The shaft rotations are translated by
the shaft encoder into meaningful water level values.
Fig. 2 Illustration of a typical bubbler system installation. Source: Second author
Advances in Water Sensor Technologies and Real-Time Water Monitoring
177
Shaft encoders are deployed inside of stilling wells and consist of five major
components: a pulley and shaft, an encoder which counts and interprets the shaft
rotations, a float, a cable, or tape which passes over the pulley and is connected to
the float on one end and a counterweight on the other end, and a counterweight
(Fig. 3). As the water level in the stilling well changes, the float goes up and down
which in turn rotates the pulley and the shaft. The shaft rotations are translated by
the shaft encoder into meaningful water level values.
Fig. 2 Illustration of a typical bubbler system installation. Source: Second author
Advances in Water Sensor Technologies and Real-Time Water Monitoring
177