Original documents, public numbers

Patent numbers can be searched on the website of the China National Intellectual Property Administration. Calibration certificates and test documents can be verified through the QR code on the document or the issuing body’s website.

Patents · CNIPA

Invention patent certificate: A differential pressure flow meter

Invention patentA differential pressure flow meterZL 2022 1 0262511.5
Grant publication CN 114719917 B · 2025-07-08

Invention patent certificate: A flow meter and its manufacturing process

Invention patentA flow meter and its manufacturing processZL 2022 1 0262502.6
Grant publication CN 114777856 B · 2026-03-06

Utility model certificate: A differential pressure flow meter and its sensing assembly

Utility modelA differential pressure flow meter and its sensing assemblyZL 2025 2 1834148.5
Grant publication CN 224435488 U · 2026-06-30

Utility model certificate: A detection device and its filter

Utility modelA detection device and its filterZL 2025 2 1846016.4
Grant publication CN 224524198 U · 2026-07-21

Utility model certificate: A flow meter structure

Utility modelA flow meter structureZL 2022 2 0581066.4
Grant publication CN 217058941 U · 2022-07-26

Compliance and testing

CE · EMCVerification of ComplianceMK26070004P02-E01
EMC Directive 2014/30/EU; EN IEC 61326-1:2021, EN 55011, etc.
TMC Testing Services (Shenzhen) · 2026-07-22

CE · LVDVerification of ComplianceMK26070004P02-S01
LVD Directive 2014/35/EU; EN 61010-1:2010+A1:2019
TMC Testing Services (Shenzhen) · 2026-07-23

RoHSVerification of ConformityKTi260813R499A2C
2011/65/EU and (EU) 2015/863; IEC 62321 series methods
Guangdong Kaixu Testing Technology · 2026-08-18

IP40 test reportTest ReportMK26070004P02-S02
EN 60529:1991+A1:2000+A2:2013
TMC Testing Services (Shenzhen) · 2026-07-23

Applicable models: VS02, VH02, VL02, VK02, VSC02, VHC02, VLC02, VKC02, etc. The CE documents are verifications of compliance issued by third-party laboratories, based on the samples submitted.

Calibration · national metrology institutes

National Institute of Metrology, China calibration certificate RGll2023-05766

Calibration certificateNational Institute of Metrology, ChinaRGll2023-05766
VC02-200SCCM-F · 2023-06-13

South China National Centre of Metrology calibration certificate NAJ202330270

Calibration certificateSouth China National Centre of MetrologyNAJ202330270
VC02-5000SCCM · 2023-04-03

Shenzhen Academy of Metrology and Quality Inspection calibration certificate JL2620160421

Calibration certificateShenzhen Academy of Metrology and Quality InspectionJL2620160421
VC02-10SLPM-F-G01-D-F · 2026-01-06

VC02 in the certificates is VISLAM’s internal model, used as a reference meter sent to the metrology institutes for value transfer. Click a certificate to enlarge it and scroll through the full results. Results apply only to the specific sample and the conditions listed in the certificate. The certificates and patent documents are shown as issued, in Chinese.