Anhydrous ammonia · 1.0 · 3.37. Mass Flow Meters

What is the acceptance tolerance (new or newly repaired device) for Anhydrous ammonia · 1.0 · 3.37. Mass Flow Meters?

For Anhydrous ammonia, accuracy class is 1.0; handbook 44 section is 3.37. Mass Flow Meters; acceptance tolerance (new or newly repaired device) is 0.6 %; maintenance tolerance (device already in service) is 1.0 %; special test tolerance is 1.0 %, verified against its source on 2026-08-20.

1.0 - Anhydrous ammonia 0.6 % 1.0 % 1.0 % - LP Gas (including vehicle-tank meters)

— nist.gov, retrieved 2026-08-20