NEWS RELEASE
Cost and Accuracy Comparisons
Mechanical Current Meter System with AquaCalc Versus Other Point Velocity Discharge Systems
Download PDF
The Hook Gauge is used to measure water level changes inside an evaporation pan. This a micrometer-style hook gauge that conforms to the classical US Weather Bureau style hook gauge.
In the second image, the gauge is shown resting on a stilling well which is sold separately.