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CNG Dispenser Accuracy Prover

This dispenser prover is designed to eliminate the need to use a calibrated scale and a loose high pressure CNG vessel when carrying out a field accuracy and calibration test. Field testing can now use the flow-through method which makes the process safer than using scales. You will no longer have to discharge the calibrated gas to a safe area or have to deal with unstrapped high pressure vessels. We have super calibrated a Micro Motion CNG50 mass flow meter to specs needed to prove the accuracy of a CNG dispenser, then we packaged it so it is transportable to the CNG station - not requiring any outside power supply. The PROV-CNG50 is powered by 24vdc sealed batteries that can be recharged using any voltage from 100vac to 240vac 50 - 60 HZ. The caring case is a high impact static resistant plastic that will make transportation very easy with the built in retractable handle. This unit can be shipped VIA: UPS, FED EX, DHL or any LTL carrier. The weight is less than 100lbs (45kg).The PROV-CNG50 can check the accuracy of a light duty vehicle dispenser to a transit bus dispenser at pressures up to 5000 PSI ( 345 BAR).

NY State Commission Letter of Approval for PROV-CNG50 (pdf format)

  • Eliminates the need to return gas from test vessel
  • Eliminates the wind load on scales
  • Eliminates the need to carry scales
  • Eliminates the need to carry CNG vessel
  • Free Software to calculate flow cal factor
  • Safest calibration method

Prover in Use

Alternative With Scales
  • This unit is rated for a Class 1 Div. 2 Group D environment
  • Flow rates in mass 2.5 to 170 lb/min, (68 to 2313 kg/h)
  • Self powered with 24vDC batteries with charger included
  • Accuracy ± 0.5% 2.5 to 6.5 lb/m, (68 to 177 kg/h) ± .5% 6.5 to 170 lb/m (177 to 4627 kg/h).
  • Minimum measured quantity 2.5 lb, (1.1 kg/h).
  • Tested by the International Organization of Legal Metrology and approved in
    report number NMi-10201016-01.

Download the flyer for this product in pdf format

Generate a Prover Part Number

Download Natural Gas Fuels Magazine Article about the Prov-CNG50 in pdf format

Tulsa Gas Tech provides free calibration software on our web site.

Examination Procedure for CNG Retail Motor-Fuel Dispensers pdf format

OIML Test Report for Coriolus Mass Flow Meter pdf format

Tulsa Gas Technologies        4809 S. 101st E. Ave.        Tulsa, OK 74146        (918) 665-2641
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