Unidata

Evaporation Monitoring System

ClimateMeteorological Station & Sensors

The Evaporation Monitoring System measures how much water evaporates from a Class A evaporation pan by measuring the water level in an adjoining stillwell. The stillwell reduces fluctuations in the pan’s water level caused by wind.

Quantity

Specification

Pan Type	US Class A compatible
Range	30mm to 250mm. Pan empty to full
Resolution	0.2mm of evaporation or rainfall
Accuracy	+/- 0.4mm
Level Reset	Programmable. Default reset to 200mm (+/- 1mm) at a preset time each day. Also resets 10mm below the overflow level.
Reset rate	Pumps 50mm out in 3 minutes. Fills 3mm per minute with 10kpa (1m) head. Rate of refill increases as head increases