R139/2018-A-NL1-26.03 Rev. 0
OIML Certificate
OIML Member State The Netherlands
Number R139/2018-A-NL1-26.03 revision 0 Project number 3821091 Page 1 of 3
Issuing authority NMi Certin B.V. Person responsible: M.Ph.D. Schmidt
Applicant and Safe S.p.A.
Manufacturer Via Lamborghini 18
40017 San Giovanni in Persiceto (BO)
Italy
Identification of the compressed gas (CG) dispenser for hydrogen certified type Type: EHS
Characteristics See following page(s)
This OIML Certificate is issued under scheme A.
This Certificate attests the conformity of the above identified type (represented by the sample(s) identified in the OIML Type Evaluation Report) with the requirements of the following Recommendation of the International Organization of Legal Metrology (OIML):
R 139:2018 "Compressed gaseous fuel measuring systems for vehicles"
Accuracy class 2
This Certificate relates only to the metrological and technical characteristics of the type of measuring instrument covered by the relevant OIML International Recommendation identified above. This Certificate does not bestow any form of legal international approval.
Important note: Apart from the mention of the Certificate's reference number and the name of the OIML Member State in which the Certificate was issued, partial quotation of the Certificate and of the associated OIML Type Evaluation Report(s) is not permitted, although either may be reproduced in full.
Issuing Authority
NMi Certin B.V., OIML Issuing Authority NL1 27 March 2026
Certification Board
This document is issued under the provision that no liability is accepted and that the applicant shall indemnify third-party liability.
OIML Certificate
Number R139/2018-A-NL1-26.03 revision 0 Project number 3821091 Page 2 of 3
The conformity was established by the results of tests and examinations provided in the associated report(s):
Characteristics of the measuring instrument
- No. NMi-3821091-01 dated 27 March 2026 that includes 35 pages.
In Table 1 the general characteristics of the measuring instrument are presented. The construction of the measuring instrument is recorded in the Documentation folder no. T9037-1.
Table 1 General characteristics
| Accuracy class | 2 |
| Minimum-maximum flow rate | Depending on the flow sensor used, see the relevant OIML certificate |
| Ratio $ Q_{\mathrm{max}}/Q_{\mathrm{min}} $ | ≥10 |
| Minimum measured quantity | 1kg |
| Maximum pressure | Depending on the flow sensor used, see the relevant OIML certificate. |
| Environmental classes | Depending on the parts used, see the relevant OIML certificates. |
| Ambient temperature range | Depending on the parts used, see the relevant OIML certificates. |
| Product temperature range | Depending on the flow sensor used, see the relevant OIML certificate. |
| Intended for the measurement of | Hydrogen($\mathrm{h}_{2}$) |
Each CG dispenser consists at least of one measuring system made up of the following essential parts: A flow meter (measurement sensor and transducer); and
- A calculating/indicating device.
The CG dispenser automatically depressurizes the entire section from the filling valve up to and including the hose via the purge valve for safety reasons. Delivery is only allowed when the purge valve is fully closed.
The CG dispenser performs a correction to account for the depressurization quantity, for this purpose the temperature, pressure and volume of the depressurization section needs to be known:
The pressure and temperature are measured in the depressurization section.
The electronic calculating and indicating device monitors the pressure and temperature measurement for status. In case of abnormalities an alarm is raised, and the refuelling terminated.
The actual volume of the depressurization section is determined based on the components of the dispenser (Pipework/valves/hoses/etc.) and configured in the calculating/indicating device.
In Table 2 the overview of the essential parts of the measuring instrument are presented.
OIML Certificate
OIML Member State The Netherlands
Number R139/2018-A-NL1-26.03 revision 0
Project number 3821091
Page 3 of 3
Table 2 Overview parts of the measuring instrument
| Part | Producer | Type | OIML certificate | OIML Reports | Remarks |
| Measurement sensor | Emerson Process Management Flow B.V. | HPC0xx | R139/2018-A-NL1-21.03 | See OIML Certificate | With MVD electronics as mentioned in OIML certificate. |
| Calculating / indicating device | Coptron | CPTH02 | R139/2018-A-NL1-25.05 | See OIML Certificate | - |
Certificate history:
| Revision | Date | Description of the modification |
| 0 | 27 March 2026 | Initial issue |