Product Introduction of Fully Automatic True Density Tester for Coal

The MDY3500 Fully Automatic True Density Tester for Coal operates based on the gas expansion displacement principle. It is a fully automated testing and analysis system controlled by a computer. Its testing methods and comprehensive data parameters make it applicable in a wider range of fields compared to similar instruments. It can accurately measure the true density, true volume, and porosity of various materials, including powders, solid blocks, slurry substances, and foams.
Technical Parameters
1) Application Range: No restrictions on sample density; capable of measuring the true density and true volume of various solid samples such as powders, granules, blocks, and foams, as well as slurry substances and non-volatile liquids.
2) Testing Range: 0-100 kPa, Accuracy: ±0.02% F.S
3) Equipped with an automatic rapid locking device for the test chamber, enabling automatic and quick sealing of the test chamber. This significantly reduces human-induced data deviations caused by manual locking, ensuring test data accuracy and reducing the workload of laboratory personnel.
4) The device features water level detection and dry-burn protection. It automatically refills and drains water when the water tank is low.
5) Equipped with a power-off protection function. In the event of a sudden power failure during testing, the intake valve automatically cuts off the gas supply to prevent sensor overload damage, gas leakage, and other safety incidents.
6) Features an automatic negative pressure degassing function, enabling rapid gas replacement in the test chamber, reference cavity, and pipelines. This ensures faster gas replacement, higher purity of the replaced gas, and more accurate test data.
8) Testing Speed: Completes the entire testing process within 3 minutes, with automatic data calculation, saving, and printing.
9) Measurable Parameters: True density, true volume, and porosity.
10) Testing Volume: 10 ml and above, suitable for samples of various volumes.
11) Pressure Range: 0-1 bar. Users can customize the maximum pressure to reduce errors caused by sample deformation under pressure.
12) Testing Gas: 8 liters of high-purity inert helium gas, purity ≥99.99%; avoids interference from other gases affecting test results.
13) Degassing Device: Degasses to 100 Pa within 5 minutes.
14) Intelligent Constant Temperature Device: Adjustable from 0-35°C with an accuracy of ±0.1°C. Utilizes "Fuzzy PID" control, offering advantages such as smaller temperature overshoot, faster stabilization time, and better temperature control precision compared to traditional PID control methods.
15) Reference Cavity: Includes one built-in reference cavity and one expansion cavity. The expansion cavity improves testing accuracy for different sample cell volumes. The program automatically determines whether to use the expansion cavity based on the sample cell volume.
16) Gas Path: Modular gas path structure with no pipe joints between valves, reducing potential leakage points and ensuring uniform temperature distribution.
17) Net Weight of Main Unit: Approximately 23 kg

Zhengzhou Aidi produces the MDY3500 Fully Automatic True Density Tester for Coal, supplying coal drill cuttings desorption instruments, deep-hole sampling devices, pressure testers, geological exploration desorption instruments, borehole flow meters, mine extraction and outburst prevention equipment, true density testers for coal, gas content testers, automatic initial gas emission speed testers, diffusion speed testers, gas parameter testers for coal extraction pipelines, and borehole coal powder circulation devices.