Hydrogen Refuelling Field Test Standard LD HFTS

TÜV SÜD National Engineering Laboratory has developed the UK’s first mobile primary standard facility for testing hydrogen refuelling stations (HRS) to ensure they deliver the correct amount of fuel to OIML R 139 standard. 

Funded by the Department for Business, Energy & Industrial Strategy (BEIS), (now Department for Science, Innovation and Technology (DSIT)) through the National Measurement System mechanism, the mobile facility will ensure accurate and consistent measurement of the dispensed quantity of fuel at HRS.  This will assure drivers of hydrogen-powered vehicles that financial transactions are correct and ensure accurate fiscal measurements for future taxation purposes. 

Technical Specification 

This test standard is a gravimetric system and can be used to verify 1 to 6 kg hydrogen fills, or H70 dispensers filling hydrogen gas up to 700 bar NWP. 

• Expanded uncertainty of the associated test method as per Part 2 of OIML R 139 

- For type evaluation: < 1/5th of the applicable MPE (maximum permissible error) 
- For verifications: < 1/3rd of the applicable MPE (maximum permissible error) 

• Based on Accuracy Class 2, the target uncertainty in collected mass of hydrogen for the (HFTS) ≈ 0.3% at 95% confidence. 

Test kit being assembled at TÜV SÜD National Engineering Laboratory 

Mobile standard in operation at a hydrogen refuelling station 

 
Field testing during MetroHyVe 2 intercomparison test in Europe

What is OIML R 139 Standard? 

The International Organization of Legal Metrology (OIML) has a specific standard - R 139 – which outlines the recommendations for ‘compressed gaseous fuel measuring systems for vehicles’.  In 2018 it was updated to include hydrogen gas. 

OIML R 139-1 - Edition 2014 (E) (PDF)

Recommendations, such as OIML R 139, are intended as model regulations for a number of categories of measuring instruments, whereby OIML Member States, of which the UK is a member, are morally obliged to implement as far as possible. 

Ask us to visit your hydrogen refuelling station.

WHY CHOOSE TÜV SÜD NATIONAL ENGINEERING LABORATORY?

TÜV SÜD National Engineering Laboratory is the UK’s Designated Institute for Flow Measurement, under contract from DSIT, and part of the UK’s National Measurement System. It provides the UK’s measurement traceability that underpins all flow measurements, and transactions based upon these.