Software with GUI for operating the PACU2 Pure Air Circulator Unit from a PC, including a GUI, drivers, and LabVIEWTM/C++/Python SDK for third-party development.
Publisher’s description
What is PACU2?
PACU2 by THORLABS Inc. is proprietary Windows software.
Installation and requirements
The publisher provides EXE (NSIS) installers for 32-bit Windows. The main installer is 8.3 MB. Installation asks for administrator rights. A silent install is possible with the installer’s documented switches.
Pros / Cons
Pros
- Documented silent install
- Small download (8.3 MB)
Cons
- Proprietary licence: check the terms and price
- No native ARM64 build
- 32-bit only
- Installation needs administrator rights
- No update for more than a year
In short: PACU2 is a Windows tool for 32-bit PCs. Updates have slowed down. Administrators can deploy it unattended.
Is PACU2 safe to download?
- The file is served by thin01mstroc282prod.dxcloud.episerver.net; check that it is the publisher’s official mirror
- The download link uses HTTPS
- A SHA256 hash is published, so you can verify the file:
39540342FF00839B11738F073DEDCB80EC58F05F2C3747EE8B206020F54C99C6· Open the VirusTotal report for this hash - The link answered when we last checked it (October 22, 2026)
- ExeAtlas does not host, wrap or modify installers
Related guide: How to check a file’s SHA256 hash on Windows
Recent versions
All 1 versions ›| Version | Date | Size | Files |
|---|---|---|---|
| 1.0.0Latest | March 27, 2024 | 8.3 MB | 32-bit ZIP |
Install from the command line
Silent install ›winget install --id Thorlabs.PACU2 -epacu2_v1.0.0_setup.zip /SRelated guide: How to use winget: install and update apps
Information
- Publisher
- THORLABS Inc.
- Licence
- Proprietary
- Price
- See the publisher’s site
- Requires
- Windows 11 / 10
- Architecture
- 32-bit
- Installer
- EXE (NSIS)
- Version
- 1.0.0
- Released
- March 27, 2024
- Added to the catalogue
- June 15, 2025
- Versions listed
- 1
- Website
- thorlabs.com
- winget ID
- Thorlabs.PACU2
Ratings and reviews
No reviews yet. Be the first to rate it.
Frequently asked questions
Is PACU2 free?
PACU2 is proprietary (closed-source) software (licence: Proprietary). Whether it costs money depends on the edition: check the publisher’s site for prices and free tiers.
Is PACU2 safe to download?
The download comes from thin01mstroc282prod.dxcloud.episerver.net; ExeAtlas does not host or change the file. Compare its SHA256 hash with the one shown here, or open the VirusTotal report for that hash.
How do I install PACU2 with winget?
Open PowerShell or Windows Terminal and run the winget command shown on this page. winget downloads the official installer and checks its SHA256 hash before running it.
Can PACU2 be installed silently?
Yes. The silent install page lists the exact command for each installer.
Does PACU2 run on ARM (Windows on Arm)?
There is no ARM64 build; Windows 11 on Arm can run the 32-bit version through emulation.