Scientific and technological innovation and research and development help measurement development

[ Instrument network instrument research and development ] The Institute of Chemical Metrology of Henan Academy of Metrology has recently successfully developed the "dissolved oxygen meter verification device".

The size of dissolved oxygen can reflect the pollution of the water body, especially the degree of organic pollution, which is an important indicator to measure water quality. Dissolved oxygen analyzers can be used to determine the concentration of dissolved oxygen in water, and are widely used in food processing, biopharmaceutical and environmental monitoring industries.

The state has issued and implemented JJG 291-2018 "Verification Regulations for Dissolved Oxygen Analyzers", which clarifies the verification items and methods of dissolved oxygen analyzers. However, currently there is no mature integrated automatic verification device on the market, and the verification personnel still need manual operation. The low verification efficiency also inevitably introduces human errors.

As part of the Henan Provincial Science and Technology Project "Water Quality Testing Instrument Traceability System and Key Technologies", the Institute of Chemistry of our institute has developed a set of dissolved oxygen analyzer verification device (authorized patent number 2019220525871) with completely independent intellectual property rights. The device is realized It has functions such as automatic detection and control of the temperature in the working area, automatic collection of ambient air pressure, automatic calculation and correction of dissolved oxygen standard values. The device has a high degree of automation, and all technical indicators are better than the requirements of the verification regulations. It can be used in measurement technology institutions at all levels to verify and calibrate the dissolved oxygen meter. It can also be used in the production and use units of the dissolved oxygen meter to perform the instrument Performance testing and quality control have good promotion and application value.