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It is accurate to ±5% of full-scale to 100 FPM and ±10% from 100 FPM to the top of scale. The Dwyer 480 has a spirit level to ensure accurate readings and the large scales are easy to read and visible from both sides.
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.