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Particle Analysis / Powder Characterization

BetterPyc 380

Gas Displacement
Automatic Calibration
EasyPyc Software
USP · Ph. Eur. · ISO Compliant

BetterPyc 380 is an automatic benchtop gas pycnometer that measures volume, true density, solid content and open cell content with 0.0001 g/cm³ accuracy using the gas displacement method. Compatible with helium or nitrogen; compliant with USP, Ph. Eur., ISO 12154 and ASTM standards.

Request a Quote → Technical Specifications
BetterPyc 380 Gas Pycnometer
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0.0001 g/cm³
Density accuracy — 4-digit precision
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He / N₂
Measurement gas — helium or nitrogen
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4 Functions
Volume · True Density · Solid Content · Open Cell
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<0.005 psig/min
Equilibrium pressure drift rate
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5 Standards
USP · Ph. Eur. · ISO 12154 · ASTM · DIN 66137-2
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EasyPyc
Software — version 3.20 and above
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Benchtop
Single-station desktop design
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Automatic
Calibration and leak detection
BetterPyc 380 Measurement Chamber

Measurement Principle

Boyle-Mariotte's Law–Based Gas Displacement Method

The sample is placed in a sealed chamber. Measurement gas is applied at a set pressure; as gas expands into a reference chamber, the pressure change is recorded. True volume and density are calculated directly from this data.

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High-Resolution Pressure Transducers
Integrated temperature control and precision pressure sensors work together to deliver repeatable results. The sample sealing system ensures full gas tightness throughout each measurement.
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Helium or Nitrogen Gas
Helium penetrates the finest pores due to its small molecular size, yielding more accurate volume measurements. Nitrogen is a cost-effective alternative for applications where helium access is restricted.
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Automatic Leak Detection
System integrity is automatically verified before each measurement. If a leak is detected, the instrument alerts the operator and prevents an inaccurate result from being recorded.
BetterPyc 380 Sample Cells

Software & Automation

EasyPyc: Four Functions, One Platform

EasyPyc (v3.20+) manages all four measurement functions from a single interface. SOP support and balance integration reduce operator input to a minimum.

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Balance Integration
Mass is read from the balance with a single click, eliminating manual entry errors and speeding up the workflow.
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SOP-Based Automation
Standard Operating Procedures are defined in the software. Every operator follows the same steps, ensuring procedural consistency across shifts and sites.
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External Water Bath Control
Temperature of the gas system is managed from within the software via an external water bath connection, improving consistency in temperature-sensitive measurements.

Frequently Asked Questions

What You Wonder About

BetterPyc 380 operates with either helium or nitrogen as the measurement gas. Helium's small molecular size allows it to penetrate the finest pores, providing more accurate volume measurements. Nitrogen is a cost-effective alternative where helium supply is limited. The choice depends on the sample type and applicable standard.

The instrument handles a broad range of material forms: solids, powders, porous solids, suspensions and semi-solids. It is used across pharmaceuticals, metal powders, ceramics, plastic foams, food powders and construction materials, among other industries.

BetterPyc 380 is compliant with DIN 66137-2, ISO 12154, USP (United States Pharmacopeia), Ph. Eur. (European Pharmacopoeia) and ASTM. This broad standard coverage makes it suitable for regulated environments, particularly pharmaceutical QC laboratories.

EasyPyc (v3.20+) manages all four measurement functions from a single platform. It reads mass from a connected balance automatically, supports SOPs to ensure procedural consistency, and controls an external water bath for temperature-sensitive measurements. Automatic calibration and leak testing are also handled within the software.

BetterPyc 380 achieves a density accuracy of 0.0001 g/cm³. This is the result of high-resolution pressure transducers, integrated temperature control and calibrated chamber volumes working together. Automatic leak detection before each run ensures that no compromised measurement passes through.

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