Manufactured by Dimo’s / Labtronics. This scale measures lbs./acre of seed applied for all drill spacing for both conventional drills & air seeders. Due to variation in seed texture & size, the chart included with your air seeder is only a starting point. To save costly seed, producers need to know the exact seeding rate. This scale is very sensitive & has a range from 0 to 250 pounds. Can be used for all grains, grass seed, and fertilizer attachments. The Dimo’s Seed Calibration Scale includes a chart with spacing & travel distance, a sample collection bag & instructions.