How Is PM 2.5 Measured?

How Is PM 2.5 Measured?

PM2.5 is tiny particles in the air. They have a size of 2.5 microns or less. These tiny particles can carry harmful substances.

What is a 3-Cup Anemometer?

What is a 3-Cup Anemometer?

A 3-cup anemometer is a tool that measures how fast the wind blows. It has three cups attached to a horizontal rotor.