The 3H-2000TD series true density meter, launched by Besed, is a cutting-edge instrument designed to accurately measure the true density of various materials. With numerous technical patents and original testing methods, this device expands its application range beyond similar instruments, offering higher measurement accuracy and a broader volume range for analysis. It has been widely adopted in research institutions and enterprises such as China Aerospace Science and Technology Fourth Hospital, Shenyang Coal Science Institute, Huahai Group, and Dow Chemical, and has received positive feedback from users.
Key test parameters include an accuracy better than ±0.04%, repeatability better than ±0.02%, and a resolution of 0.0001g/ml. The test process can be completed in just 0.5 to 1 minute per station, with double-station analysis doubling efficiency. The instrument supports one sample at a time in a single analysis station (model 3H-2000TD1), and it can handle a wide range of samples, including powders, granules, blocks, foams, slurries, and non-volatile liquids, with a volume range from 0.01 to 2000ml.
The sample cell comes in three standard sizes (10ml, 20ml, 50ml) and can be customized up to 500ml, making it suitable for samples of various sizes. A large-volume cell (over 150ml) is also available. The pressure range is 0–1 bar, and users can customize the maximum pressure to reduce deformation-related errors.
The instrument uses high-purity helium (≥99.999%) as the test gas, with nitrogen as an optional alternative. It includes imported valves and pressure sensors, ensuring precision and reliability.
One of the key features is the "bottom mount" sample cell design, which improves chamber utilization and enhances test accuracy. This patented technology (Patent No. 5) allows for larger sample loading, up to over 500ml, significantly expanding the testing range. Another innovation is the air control valve (Patent No. 8), which eliminates volumetric errors caused by heat from solenoid valves in similar instruments.
Each analysis station includes a built-in reference cavity and an expansion cavity, which helps improve accuracy based on the sample cell size. The system automatically selects whether to use the expansion cavity. The instrument also offers automatic repetition, pressure balance options (default, user-selected, or user-defined), and an intelligent self-test function that detects leaks and ensures airtightness, reducing human error.
The device features a graphical control interface, power-off protection, chip memory for zero configuration, detailed operation logs, real-time voice prompts, multi-language support, and network remote control capabilities.
Besed provides comprehensive pre- and after-sales services, including installation, training, and 24-hour response times through offices in Shanghai and Guangzhou. The company also offers free warranty, software upgrades, and regular follow-ups to ensure customer satisfaction.
The 3H-2000TD series operates based on the Archimedes principle using a gas expansion displacement method. By applying Boyle's law (PV = nRT), it measures the volume change in the sample chamber when inert gas is introduced, allowing for precise determination of the sample’s skeleton volume, including closed cells. This method avoids the risks of dissolving or damaging the sample, as gas can penetrate small pores and surface irregularities, providing a more accurate representation of true density.
The system consists of a sample test chamber and a reference chamber. During testing, the instrument records the initial pressure and volume of the reference cavity, then introduces the sample into the test chamber, injects gas, and records the stabilized pressure. Finally, it connects the two chambers and measures the final pressure. Using these values and known volumes, the instrument calculates the sample’s volume and subsequently its true density.
With its advanced air control valve structure and bottom-mounted sample cell design, the 3H-2000TD series sets a new benchmark in true density measurement, delivering unmatched accuracy, versatility, and user-friendliness.
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HENAN QIFAN ELECTRIC CO., LTD. , https://www.hnqifancable.com