R137/2012-A-NL1-25.02 Rev. 0
OIML Certificate
OIML Member State The Netherlands
Number R137/2012-A-NL1-25.02 revision 0 Project number 3805287 Page 1 of 3
Issuing authority NMi Certin B.V. Person responsible: M.Ph.D. Schmidt
Applicant and Manufacturer
ant and
racturer
ZENNER Metering Technology (Shanghai) Ltd.
No. 800 Songda Road
Qingpu District
Shanghai
P.R. China
Identification of the certified type
A Diaphragm gas meter
Manufacturers mark: Type:
ZENNER Atmos IxxS-GI Atmos IxxA-GI Atmos HP IxxA-GI "xx" is G1.6,G2.5,WG2.5,G4,G4L, G6M, WG6M
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 137-1:2012 "Gas meters"
Accuracy class 1,5
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.
This certificate and supporting reports comply with the requirements of OIML-CS-PD-07 clause 6.2.
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 2025
Certification Board
This document is issued under the provision that no liability is accepted and that the applicant shall indemnify third-party liability.
This document is digitally signed and sealed. The digital signature can be verified in the blue ribbon at the top of the electronic version of this certificate.
OIML Certificate
Number R137/2012-A-NL1-25.02 revision 0 Project number 3805287 Page 2 of 3
The conformity was established by the results of tests and examinations provided in the associated report(s):
No. NMi-2449796-02A dated 9 June 2020 that includes 11 pages;
No. NMi-13200090-04 dated 17 November 2015 that includes 50 pages;
No. NMi-2430358-02 dated 2 December 2020 that includes 18 pages;
No. NMi-3487936-01 dated 18 September 2023 that includes 18 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. T12939-1.
Table 1 General characteristics
| Maximum pressure | Atmos IxxS-GI Atmos IxxA-GI | 0,5 bar |
| Atmos HP IxxA-GI | 1,5 bar | |
| Environmental classes | M1/E1 | |
| Ambient temperature range | -25-+55℃; condensing humidity | |
| Gas temperature range | -25-+55℃ | |
| Orientation | connection ports vertical | |
| Intended for the measurement of | Gas volume | |
Table 2 General characteristics of the family of instruments
| Meter size | G1.6 | G2.5 | G4 | WG2.5 | G4L | G6M | WG6M |
| Minimum flow rate $Q_{\mathrm{min}}$(m3/h) | 0,016 | 0,025 | 0,04 | 0,016 | 0,04 | 0,06 | 0,04 |
| Transitional flow rate $Q_{\mathrm{t}}$(m3/h) | 0,25 | 0,4 | 0,6 | 0,2 | 0,6 | 1 | 0,6 |
| Maximum flow rate $Q_{\mathrm{max}}$(m3/h) | 2,5 | 4 | 6 | 6 | 6 | 10 | 10 |
| Overload flow rate $Q_{\mathrm{r}}$(m3/h) | 3 | 4,8 | 7,2 | 7,2 | 7,2 | 12 | 12 |
| Cyclic volume(dm3) | 1,2 | 2,0 | |||||
| Indicating range(m3) | 99999 | 99999 | |||||
| Verification scale interval(m3) | 0,0002 | 0,0002 | |||||
OIML Certificate
Number R137/2012-A-NL1-25.02 revision 0 Project number 3805287
Page 3 of 3
Production location
The measuring instrument is produced at one of the following production locations:
Zenner Performance Meters Inc. 1910E. Westward Ave Banning, CA 92220 United States of America;
ZENNER International GmbH & Co. KG, Heinrich-Barth-Straße 29, 66115 Saarbrücken, Germany;
Zenner do Brasil Instrumentos, de Medição Ltda., Rua Batrolomeu de Gusmao, 2444-Novo Hamburgo-RS, Brazil;
ZENNER International GmbH & Co. KG, Talstraße 2, 09619 Mulda, Germany.
ZENNER-COMA JVC., Construction Machininery Company, 125D Minh Khai, Q Hai Ba Trung Hanoi, Vietnam;
ZENNER Aquamet India Pvt Ltd, 39-B HSIDC, Sec-31 Faridabad (Haryana)-121003, INDIA.
Certificate history:
| Revision | Date | Description of the modification |
| 0 | 11 April 2025 | Initial issue |