www.h2flow.net
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Tel: 888-635-0296 (Toll Free)
OR
(+1) 419-841-7774 (International)
20
18.
NSF 50 accuracy certification
The accuracy of AcuFlow Digital has been independently certified by NSF to the NSF 50 Standard for Flow Meters. At the
time of printing, AcuFlow Digital is the only digital flow meter in the world to have been certified to this rigorous standard.
The NSF 50 flow meter standard has five levels of accuracy that a flow meter can be certified to - Levels 1 to 5 (L1-L5), and
where L1 is the most accurate:
Level 1 (L1)
- Average of absolute values of all single point deviations must be ≤2%. Single point deviations
shall not exceed
±
4%.
Level 2 (L2)
- Average of absolute values of all single point deviations must be ≤5%. Single point deviations
shall not exceed ±7.5%.
Level 3 (L3)
- Average of absolute values of all single point deviations must be ≤10%. Single point deviations
shall not exceed ±12.5%.
Level 4 (L4)
- Average of absolute values of all single point deviations must be ≤12.5%. Single point deviations
shall not exceed ±15%.
Level 5 (L5)
- Average of absolute values of all single point deviations must be ≤15%. Single point deviations
shall not exceed ±20%.
AcuFlow Digital connected to
AcuFlow model
AcuFlow Digital accuracy
Flow Range (GPM)
AF-15
L1
20-90
AF-15-U
L1
20-90
AF-2
L1
20-110
AF-2-U
L1
20-110
AF-25
L1
20-110
AF-3
L1
90-240
AF-4
L2
150-450
AF-6
L1
300-1000
AF-8
L1
600-1800
AcuFlow Digital has been certified to NSF 50 as follows:
