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Download and installation instructions for Crimson 2.1

Release date: 12 May 2025

Legacy programming software for PXU meters and controllers, PAX2, PAX, EPAX, LPAX, LD, CUB5 and ICM8 meters.

Release notes

Why choose Crimson® 2.1?

Crimson® 2.1 – Proven Configuration Software for Red Lion Panel Meters and Controllers

Crimson® 2.1 is a previous-generation configuration software from Red Lion, designed for reliable programming and updates of our award-winning panel meters and PID controllers, including:

  • PXU Series Meters and Controllers
  • PAX, PAX2, EPAX, and LPAX Meters
  • LD Displays, CUB5 Meters, and ICM8 Modules

With its intuitive interface and versatile features, Crimson 2.1 continues to offer a cost-effective and user-friendly solution for legacy systems that require stable and proven software.

Simplified Programming and Database Management

Crimson 2.1 offers a user-friendly experience designed to streamline setup and maintenance:
Effortless programming and file storage
Quick software updates
Compatible with Red Lion’s latest meters and controllers
Easy communication setup based on your device's specification
Refer to your product’s datasheet for required communication settings when downloading databases from Crimson 2.1.

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How to install

Download and install Crimson 2.1, Gold Build – 2.1.0.700

  1. Right-click on the Download link below and select Save As
  2. Select a suitable directory on your PC to save the file
  3. When the download is complete, run the file to install

Note: This build requires a PC running Windows XP or later.  Tablet PCs are not supported at this time. Crimson 2 may experience problems running under Windows 10 with touch screen or pen support enabled.  These features are not supported at this time, and will not allow Crimson to start when they are enabled.

Important Installation Note:

If an older version of Crimson® 2.1 for Panel Meters is installed, please uninstall it first using Windows "Add or remove programs" before installing this version.

For Windows Vista users:

After installing, also download and unzip this file, then copy the Device folder into:
C:\Program Files\Red Lion Controls\Crimson 2.1

Important Note for PXU Users

If you’re a PXU customer who previously used Crimson 2.0, please note:

  • PXU databases cannot be converted from Crimson 2.0 to 2.1
  • You’ll need to recreate the database manually in Crimson 2.1

All other supported devices allow for a seamless upgrade using the Crimson 2.0-to-2.1 conversion utility included in the software.

End of Support for Crimson® 2.0

While Crimson® 2.0 remains available for programming legacy Red Lion products, its official support (including updates and feature additions) ended on March 31, 2018.
Use Crimson 2.0 only for:

  • Older panel meters and PID controllers
  • Legacy Red Lion HMI products not supported in newer software versions

Download Crimson® 2.0 if your hardware is not compatible with Crimson 2.1.

Revision history

File Build Filetype Size
Crimson Setup 2.1.0500
2.1.0500 .exe 25.4 MB
Download
Crimson 2.1 - Release Notes
.pdf 59.2 KB
Download
Crimson Setup 2.1.0100
2.1.0100 .exe 25.4 MB
Download
Crimson 2.1 - Release Notes
.pdf 59.2 KB
Download
Crimson Setup 2.1.0000
2.1.0000 .exe 25.4 MB
Download
Crimson 2.1 - Release Notes
.pdf 59.2 KB
Download