Geonica - Model 255-110 -Precision Evaporation Rate Sensor

The 255-100 Analog Output Evaporation Gauge is used to determine the evaporation rate by measuring the changing water level in an evaporation pan. A standard National Weather Service Class A Evaporation Pan is recommended. The sensor 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 connected to our Automatic Weather Stations Model METEODATA-2000/3000C Series, which allow also data transmission to a Central Stations. The water level sensor can be placed directly in the pan, or externally connected to the pan by means of a suitable pipe and fittings.