Compressed natural gas as a motor-fuel · 2.0 · 3.37. Mass Flow Meters

What is the acceptance tolerance (new or newly repaired device) for Compressed natural gas as a motor-fuel · 2.0 · 3.37. Mass Flow Meters?

For Compressed natural gas as a motor-fuel, accuracy class is 2.0; handbook 44 section is 3.37. Mass Flow Meters; acceptance tolerance (new or newly repaired device) is 1.5 %; maintenance tolerance (device already in service) is 2.0 %; special test tolerance is 2.0 %, verified against its source on 2026-08-20.

2.0 - Compressed natural gas as a motor-fuel 1.5 % 2.0 % 2.0 % - All other hydrocarbon gases and any other hydrocarbon gas/air mix applications not shown in the table

— nist.gov, retrieved 2026-08-20