Wildco® Gravelometer Field Sieve

Grade or measure gravel and small cobble.

• Separates gravel, rocks, and sediment by size for hands-on earth science investigations

  Supports outdoor field studies and analysis of soil and streambed materials

  Helps students observe patterns in particle size related to erosion and deposition

  Builds skills in collecting, organizing, and interpreting physical science data

  Durable for repeated classroom and field use in student investigations NGSS 4-ESS2-1, MS-ESS2-2

This handheld device - also known as a gravel template and pebble meter - is used to grade or measure gravel and small cobble-sized bed sediments in the field. Constructed of 1/8" aluminum, it has 14 square holes of common sieve sizes (1/2-phi unit classes) ranging from 2 to 180 mm. Scale (in 10 mm increments) along one side can be used to measure up to 310 mm.

Supports NGSS performance expectations related to Earth’s surface processes, including erosion, weathering, and sediment transport (e.g., 4-ESS2-1, MS-ESS2-2).