R117/2019-A-NL1-23.02 Rev. 0
OIML Certificate
OIML Member State The Netherlands
Number R 117/2019-A-NL1-23.02 revision 0 Project number 3595548 Page 1 of 3
Issuing authority NMi Certin B.V. Person responsible: M.Ph.D. Schmidt
Applicant and Manufacturer Oil & Gas Measurement Limited Denmark House, St. Thomas Place ELY, Cambridgeshire, CB7 4EX United Kingdom
Identification of the certified type
identification of the certified type An ultrasonic measurement device intended to be used as a part of a measuring system Type: DFX-LV
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 117-1:2019 "Dynamic measuring systems for liquids other than water"
Accuracy class 0,3
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 11 April 2023
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 R 117/2019-A-NL1-23.02 revision 0 Project number 3595548 Page 2 of 3
The conformity was established by the results of tests and examinations provided in the associated reports:
No. NMi-16200659-01 dated 23 February 2016 that includes 6 pages;
No. NMi-16200659-02 dated 23 February 2016 that includes 13 pages.
No. NMi-3595548-01 dated 11 April 2023 that includes 44 pages.
Characteristics of the measuring instrument
In Table 1 the general characteristics of the measuring instrument are presented. In Table 2 the characteristics of the family of instruments are presented.
The construction of the measuring instrument is recorded in the Documentation folder no. 16200659-1.
Table 1 General characteristics
| Manufacturer's trademark | Oil & Gas Measurement Limited |
| Type designation | DFX-LV |
| Accuracy class | 0,3 |
| Measurement principle | Ultrasonic |
| Number of sound paths | 15(total 10 transducers) |
| Path angle | Various |
| Sound frequency | 1 MHz-2 MHz |
| Environment Classes | M1/E2/H3 |
| Ambient temperature range | -40℃...+70℃ |
| Liquid temperature range | -5℃...+35℃ |
| Density range | 630...950kg/m3 |
| Maximum viscosity | 5,2mPa·s |
| Minimum Reynolds number | 10.000 |
| Straight pipe length requirements | Upstream10D+flow straightenerDownstream5D |
| Maximum pressure | 10bar(g) |
| Electrical power | 230VAC/50Hz;24VDC;Earth connection of the internal power supply not to be connected. |
| Identification of software | Version:15.1110Checksum:0x6C428B12 |
OIML Certificate
OIML Member State The Netherlands
Number R 117/2019-A-NL1-23.02 revision 0
Project number 3595548
Page 3 of 3
Table 2 Characteristics of the family of instruments
| Type | Size | Minimum flow rate[m3/h] | Maximum flow rate[m3/h] | MMQ[m3] | Remarks |
| DFX-LV04 | 4"(100mm) | 15 | 300 | 0,5 | |
| DFX-LV06 | 6"(150mm) | 65 | 600 | 2 | |
| DFX-LV08 | 8"(200mm) | 120 | 600 | 2 | |
| DFX-LV10 | 10"(250mm) | 200 | 600 | 5 | Requires an automatic checking device to detect and generate an alarm when the flow rate is outside the restricted flow range |
| DFX-LV12 | 12"(300mm) | 250 | 3000 | 5 | |
| DFX-LV14 | 14"(350mm) | 320 | 3200 | 10 | |
| DFX-LV16 | 16"(400mm) | 400 | 4000 | 10 | |
| DFX-LV18 | 18"(450mm) | 520 | 5200 | 10 |
Certificate history:
| Revision | Date | Description of the modification |
| Initial | 11 April 2023 | First release |