R137/2012-A-NL1-24.05 Rev. 0
OIML Certificate
OIML Member State The Netherlands
Number R137/2012-A-NL1-24.05 revision 0
Project number 3794783
Page 1 of 2
Issuing authority NMi Certin B.V. Person responsible: M.Ph.D. Schmidt
Applicant and Manufacturer
icant and Zhejiang Chint Instrument & Meter Co., Ltd
ufacturer No.1 Liangce Road
Yueqing City
Whenzhou, Zhejiang Province
P.R. China
Identification of the certified type
Manufacturers mark: Type:
Zhejiang Chint Instrument & Meter Co Ltd ZT-GxS, ZT-GxA, GxS
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 1 July 2024
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 R137/2012-A-NL1-24.05 revision 0 Project number 3794783 Page 2 of 2
The conformity was established by the results of tests and examinations provided in the associated report(s):
No. NMi-1901571-02 dated 12 October 2018 that includes 46 pages.
In Table 1 the general characteristics of the measuring instrument are presented.
Characteristics of the measuring instrument
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. T10052-8.
Table 1 General characteristics
| Minimum-maximum flow rate | xxx-xxx L/min;uni-directional |
| Maximum pressure | 0,5 bar |
| Environmental classes | M1/Ey2 |
| Ambient temperature range | ZT-GxS and ZT-GxA: -10-+40℃GxS and GxA: -25-+55℃ |
| Gas temperature range | ZT-GxS and ZT-GxA: -10-+40℃GxS and GxA: -25-+55℃ |
| Orientation | Connection ports vertical |
| Designed for | Condensing humidity |
| Intended for the measurement of | Gas volume |
Table 2 General characteristics of the family of instruments
| Meter size | G1.6 | G2.5 | G4 |
| Minimum flow rate $Q_{\min}(m^{3}/h)$ | 0,016 | 0,016 | 0,016 |
| Transitional flow rate $Q_{t}(m^{3}/h)$ | 0,25 | 0,4 | 0,6 |
| Maximum flow rate $Q_{\max}(m^{3}/h)$ | 2,5 | 4 | 6 |
| Overload flow rate $Q_{r}(m^{3}/h)$ | 3 | 4,8 | 7,2 |
| Indicating range $(m^{3})$ | 99999,999 | ||
| Verification scale interval $(m^{3})$ | 0,0002 | ||