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Source and licence

Licence​

Psychrometrics is licensed under the Apache License 2.0. Copyright 2026 Nedama Integrated Solutions.

Ignition is a trademark of Inductive Automation. This module is not affiliated with or endorsed by Inductive Automation.

Credits​

  • ASHRAE. Equations and coefficients are from the ASHRAE Handbook, Fundamentals (2017), chapter 1.
  • PsychroLib. The calculations are a Java port of parts of PsychroLib 2.5.0, which implements the ASHRAE equations. PsychroLib is licensed under the MIT License.
  • Murphy and Koop. Saturation vapour pressure over supercooled water below 0 °C uses the equation in D. M. Murphy and T. Koop, "Review of the vapour pressures of ice and supercooled water for atmospheric applications", Quarterly Journal of the Royal Meteorological Society 131 (2005), pages 1539 to 1565.

The full notices are in THIRD_PARTY_NOTICES.md.

Source code​

The source code is public, in the psychrometrics-ignition repository on GitHub.

Building from source needs JDK 17 and Maven 3.8 or newer:

git clone https://github.com/Nedama-Integrated-Solutions/psychrometrics-ignition.git
cd psychrometrics-ignition
mvn clean package

This builds an unsigned module for each Ignition line. Only the release files are signed. To install your own build, use a test gateway that allows unsigned modules.

Questions​

For questions that are not security problems, contact us.