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    Analog Output Evaporation Gauge

Analog Output Evaporation Gauge


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 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 remotely by telemetry equipment. The instrument can be placed directly in the pan, or connected to the pan using the 255-100P/F stainless steel pipe and fittings.

255-100 Evaporation Gauge
Potentiometer
  Accuracy  0.25%
  Rotation  Continuous
  Resistance  1000 ohms
  Operating temperatures  -40°C to 60° C
  Linearity  0.25%
  Range  0-10"
System accuracy  Evaporation gauge with pan and pipes ± 0.25% over 10" range
Float  4" diameter
Height  27-1/2"
Diameter  8"
Base  16" triangle with leveling screws
Water input port  1/2" NP coupling, female
Cable  3 conductor, 50' included
Weight/Shipping  7-1/2 lbs/15 lbs
Shipping box  29" x 17" x 16"
255-100-P/F Stainless Steel Pipe & Fittings
Material  304 stainless steel
Dimensions  60" long, 1/2" NPT fitting
Weight/Shipping  5 lbs/6 lbs