R85/2008-A-NL1-22.02 Rev. 2
OIML Certificate
OIML Member State The Netherlands
Number R85/2008-A-NL1-22.02 revision 2 Project number 3999104 Page 1 of 3
ssuing authority NMi Certin B.V.
Person responsible: M.Ph.D. Schmidt
Manufacturer Joyo M&C Technology Co., Ltd.
Room 008,1F (2-3), Building 4, Ganluyuan, Chaoyang District
Beijing China
Identification of the certified type
An automatic level gauge (servo principle) with temperature and density displacer sensor Manufacturer's mark: Joyo M&C Technology Co., Ltd. Type: BJLM-80H
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 85-1&2:2008 "Automatic level gauges for measuring the level of liquid in stationary storage tanks"
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 14 August 2025
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 R85/2008-A-NL1-22.02 revision 2 Project number 3999104 Page 2 of 3
The conformity was established by the results of tests and examinations provided in the associated report(s):
No. NMi-2579596-01 $ ^{1} $ dated 14 June 2022 that includes 29 pages;
No. NMi-2579596-02 dated 14 June 2022 that includes 23 pages;
No. NMi-3866763-01 dated 25 May 2025 that includes 29 pages;
No. NMi-3866764-01 dated 27 June 2025 that includes 11 pages.
Characteristics of the measuring instrument
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. 2579596-2.
The automatic level gauge is intended to measure by servo principle automatically and display the level of the liquid contained in a tank. Herewith the following displacer types can be used:
SF displacer with no additional sensors;
TF displacer including temperature sensor;
MF displacer including temperature sensor and density sensor.
Table 1 General characteristics
| Maximum measuring range level | 50 metres | |
| Ambient temperature range | -40-+70℃; condensing humidity | |
| Temperature displacer measuring range | -5-+35℃(only applicable for TF and MF displacers) | |
| Density displacer measuring range | 600-1020kg/m3(only applicable for MF displacers)at maximum viscosity of 5mPa·s | |
| Power supply voltage | 200-240V AC;50/60Hz or24-48V DC | |
| Software identification | Level gaugeVersion number:V10.9-Checksum:136699Version number:V50.8-Checksum:31452TF or MF displacerVersion number:V5.2-Checksum:63162Version number:V10.9-Checksum:63162 | |
| Data communication | Inputs | -HART |
| Outputs | -Modbus-BPM-HART-4-20mA analog output | |
OIML Certificate
OIML Member State The Netherlands
Number R85/2008-A-NL1-22.02 revision 2 Project number 399104
Page 3 of 3
Certificate history:
This revision replaces the previous versions.
| Revision | Date | Description of the modification |
| Initial | 14 June 2022 | Initial issue |
| 1 | 27 June 2025 | Extension to 50m and software update |
| 2 | 14 August 2025 | Adding remark to clarify where the MPE for density and temperature test came from. Correcting Type name. |