Recently, the market regulatory authorities of Beijing, Tianjin, and Hebei jointly released seven co-developed metrological technical specifications covering air pollution control, water quality monitoring, and public utility measurement. This marks the ninth batch of regional technical documents issued since the three regions established a collaborative mechanism for metrological standards in 2017, bringing the total number of specifications to 43. This initiative has formed a "Beijing-Tianjin-Hebei model" for cross-regional metrological technical coordination.
To address the long-standing industry challenge of lacking unified calibration standards for volatile organic compounds (VOC) monitoring equipment, the three regions pioneered the development of the "Calibration Specification for Online Photoionization Monitors of Volatile Organic Compounds." This specification innovatively introduces a humidity interference error index, controlling the instrument's indication error within ±5% FS and reducing repeatability to 2%. The new standard effectively fills the gap in performance evaluation criteria for such instruments in China and standardizes key technical requirements and calibration methods for value transmission. It ensures measurement accuracy and uniformity, guiding manufacturers to improve product quality and better meet environmental protection needs while providing precise data support for joint air pollution prevention and control.
In the field of water environment management, the "Calibration Specification for Fully Automatic Intelligent Water Quality Analyzers" resolves the issue of manufacturers lacking unified standards, which previously hindered effective traceability to national benchmarks. The specification establishes scientific metrological performance indicators: spectrophotometric instruments must maintain an indication error within ±5%, volumetric instruments within ±3%, and repeatability no greater than 3%. These criteria strengthen the reliability of testing data. The new standard will comprehensively regulate the calibration of such instruments, guide manufacturers in enhancing product quality, and improve the monitoring accuracy of key water quality parameters in the Beijing-Tianjin-Hebei region. It will provide precise data support for surface water environment management and pollution prevention decision-making while reinforcing regional water quality monitoring and governance capabilities to safeguard water safety and public health.
For gas metering, the "Calibration Specification for Gas Meter Verification Devices" introduces a "modular integrated calibration" model. The unified testing system, featuring integrated gas path control, data acquisition, and standard device configuration, enables the evaluation of three core parameters—indication error, pressure loss, and sealing—on a single platform. This specification will ensure the accuracy of measurement values at the source, standardize gas meter verification and calibration processes, protect public interests, and strengthen safety measures for public utilities.
The market regulatory authorities of the three regions have implemented a "shared existing standards, co-developed new standards" mechanism, achieving mutual recognition and sharing of 413 metrological technical specifications. They have established a comprehensive management system, including annual joint project approvals, quarterly collaborative reviews, unified releases, and centralized effectiveness assessments, to promote coordinated metrological development in the region. Currently, the three regions are drafting specifications for medical temperature alarms and fetal heart simulators to support high-quality development in the health sector.
The release of these seven specifications signifies that Beijing-Tianjin-Hebei metrological collaboration has entered a new phase of "standard integration" beyond "hardware connectivity." The three regions will continue to refine their regional metrological coordination system, leveraging high-standard metrological technology to build a world-class urban cluster and provide robust technical support for a green, safe, and high-quality development framework in the Beijing-Tianjin-Hebei region.
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