How to Read the World's Coolest Rain Gauge®

The blue tube rises as rain collects in the copper container. The rainfall amount is read at the top rim of the copper container where it meets the scale.

Why Are The Numbers Upside Down?

Unlike traditional rain gauges, the measurement tube floats upward as rainfall accumulates. Because the tube rises, the lower numbers are located at the top of the scale and the higher numbers are lower down.

Reading The Gauge

1. Look at the top rim of the copper container.
2. Find the number on the blue tube that lines up with the rim.
3. That number is the amount of rainfall received.

In the example shown above, the rim aligns with the 2-inch mark, so the gauge indicates 2 inches of rain.

Why It Works

Rain enters the copper container and flows into the bottom of the blue measurement tube. As the water level rises, the blue tube floats upward, making the rainfall amount easy to see from a distance.

Tips For Accurate Readings

• Place the rain gauge in an open area away from roofs, trees, and other obstructions.
• Empty the gauge only when rainfall exceeds the measurement range.
• For longest life, remove the blue tube and store it indoors during prolonged periods of freezing temperatures.
• Periodically rinse the tube to keep the scale easy to read.

Frequently Asked Questions

Do I read the top of the blue tube?
No. Always read where the top rim of the copper container intersects the scale.

Why are the numbers reversed?
The measurement tube rises as rainfall increases, so the scale is printed in reverse order.

Do I need to empty the gauge after every rain?
No. The gauge automatically resets as water evaporates or can be emptied whenever you wish.