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AccuPyc III 1350 Pycnometer

AccuPyc III 1350 Pycnometer

AccuPyc II 1350 Pycnometer

Gas Displacement Pycnometry System
  • Best-in-class density measurements
  • AccuPyc Temperature Control enhances stability with a range from 4°C to 60°C.
  • Hinged Self-aligning enclosure simplifies operation and guarantees precision
  • Intuitive Breeze Interface


Gas Displacement Pycnometry System


Gas pycnometry is recognized as one of the most reliable techniques for obtaining true, absolute, skeletal, and apparent volume and density. This technique is non-destructive as it uses the gas displacement method to measure volume. Inert gases, such as helium or nitrogen, are used as the displacement medium. Density calculations using the gas displacement method are much more accurate and reproducible than the traditional Archimedes water displacement method.

The AccuPyc II 1350 Pycnometer is a state-of-the-art, fully automatic instrument providing high-speed, high-precision volume measurements and true density calculations on a wide variety of powders, solids, and slurries. The system completes most sample analyses in less than three minutes without sacrificing accuracy. After analyses are started with a few touches of the scrren, data is collected, calculations are performed, and results are displayed.

Key Features

    1. High Accuracy and Repeatability: The AccuPyc III 1350 delivers the highest levels of accuracy and repeatability in density measurements. Its design includes the most stable temperature control, cutting-edge gas modeling, and a self-aligning lid to ensure consistent results.
    2. Ease of Use: The instrument is designed for user-friendly operation. It features an intuitive Breeze interface that allows for easy measurement and result review with or without a PC. The hinged self-aligning lid ensures frustration-free operation.
    3. Versatile Measurement Capabilities: The AccuPyc III 1350 can measure true density using various gases such as nitrogen, air, and argon, without additional steps or calibrations. It also supports a wide range of measurement volumes with simple volume insert kits, accommodating both scarce samples and large, heterogeneous materials.
    4. Temperature Control: The AccuPyc III 1350 includes AccuTemp technology, which maintains temperature stability to within ±0.025°C, ensuring reliable density measurements across a range of 4°C to 60°C.
    5. Advanced Connectivity: The instrument supports seamless device connectivity, including USB ports for data transfer and peripheral device integration. It also integrates with laboratory information management systems (LIMS) and features MIC Net for synchronizing results and methods across devices.
    6. PowderSafe Mode: This mode is designed for safe measurement of light, fluffy powders by pressurizing the reference chamber before the sample chamber, preventing elutriation.


Principle of Operation

This technique uses the gas displacement method to measure volume accurately. Inert gases, such as helium or nitrogen, are used as the displacement medium. The sample is sealed in the instrument compartment of known volume, the appropriate inert gas is admitted, and then expanded into another precision internal volume. The pressures observed upon filling the sample chamber and then discharging it into a second empty chamber allow computation of the sample solid phase volume. Helium molecules rapidly fill pores as small as one angstrom in diameter; only the solid phase of the sample displaces the gas. Dividing this volume into the sample weight gives the gas displacement density.


Density measurement

On an elementary level, the volume of a solid material can be calculated by measuring its length, width, and thickness. However, many materials have within their structure surface irregularities, small fractures, fissures, and pores. Some of these voids or pores are open to the surface or closed within the structure of the solid material. Therefore, differences in the material volume depend on the measurement technique, measurement method, and the conditions under which the measurements were performed.

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