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 conventional instruments, offering higher measurement accuracy and broader material compatibility. It is widely used in renowned institutions 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:
- **Test Accuracy**: Better than ±0.04%
- **Repeatability**: Better than ±0.02%
- **Resolution**: 0.0001 g/ml
- **Test Speed**: 0.5–1 minute per sample (double station analysis doubles efficiency)
- **Sample Volume Range**: 0.01–2000 ml
- **Sample Cell Options**: 10ml, 20ml, 50ml; customizable up to 500ml
- **Pressure Range**: 0–1 bar (customizable maximum pressure available)
- **Test Gas**: High-purity helium (≥99.999%), with nitrogen as an optional gas
The 3H-2000TD series features a unique **bottom-mounted sample cell** design (Patent No. 5), which maximizes chamber volume utilization—over 90% for a 10ml cell—ensuring greater accuracy, especially for small samples. Unlike traditional top-loaded cells that often leave unused space, reducing accuracy, the bottom-mount design allows for large-volume loading, up to 500ml, making it ideal for diverse sample types including powders, granules, blocks, foams, and non-volatile liquids.
The **air control valve** system (Patent No. 8) eliminates volumetric errors caused by heat from solenoid valves, ensuring precise gas flow control without software correction. Each analysis station includes a built-in reference cavity and expansion cavity, automatically adjusting based on the sample cell size to enhance accuracy. The instrument also supports automatic repetition, pressure balance modes, self-testing, and real-time voice prompts, improving user experience and minimizing human error.
With a graphical interface, power-off protection, memory function, and detailed operation logs, the 3H-2000TD series ensures reliable performance and ease of use. It also offers multi-language support, remote control capabilities, and comprehensive pre- and after-sales services, including on-site installation, training, and rapid response within 24 hours across major cities like Shanghai and Guangzhou.
The principle behind the instrument is based on the **Archimedes' principle combined with the gas expansion displacement method**, where inert gas is used to measure the sample’s skeleton volume. This non-destructive method avoids dissolution or damage to the sample, providing more accurate results compared to liquid immersion techniques. By calculating the pressure changes during gas expansion, the instrument determines the true density as mass divided by the measured skeleton volume. This advanced technology makes the 3H-2000TD series a reliable and versatile tool for researchers and industrial applications alike.
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