MODEL 3003 : Analog Output Evaporation Gauge
The Model 3003 Analog Output Evaporation Gauge is used to determine the evaporation
rate by measuring the changing water level in an evaporation pan. A standard Class
A National Weather Service evaporation pan is recommended.
The instrument consists of a float, pulley, and counterweight attached to a precision
1000-ohm potentiometer mounted through a gear assembly in a weatherproof housing.
The triangular base plate is equipped with three leveling screws. The potentiometer
produces a resistance output proportional to the position of the float which can
be monitored on site using a data logger or a strip chart recorder, or remotely using
HydroLynx Data Transmitters.