The software package for Thorlabs' Quart-Enhanced Photoacoustic Sensor is a graphical user interface (GUI) that controls the data acquisition for the QEPAS-CH4 methane sensor. This user-friendly GUI allows the user to set measurement parameters, measure methane concentrations, and perform statistical analysis on the data. A Data Viewer within the software can be used to view and analyze data from a previously saved measurement.
Publisher’s description
What is QEPAS?
QEPAS is a proprietary program for Windows from THORLABS Inc..
Installation and requirements
Official installers exist for 64-bit as EXE (NSIS). The main installer is 29.6 MB. Installation asks for administrator rights. The installer supports unattended (silent) installation.
Pros / Cons
Pros
- Documented silent install
Cons
- Proprietary licence: check the terms and price
- No native ARM64 build
- Installation needs administrator rights
- No update for more than a year
In short: QEPAS is a Windows tool for 64-bit PCs. Updates have slowed down. Administrators can deploy it unattended.
Is QEPAS 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:
8DB8595EE976E8F617E7FFFF2C00500DD9A7A6F6C9B1D438DC24BDBF03802F48· 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 | December 20, 2023 | 29.6 MB | 64-bit EXE (NSIS) |
Install from the command line
Silent install ›winget install --id Thorlabs.QEPAS -eqepas_v1.0.0_setup.exe /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
- 64-bit
- Installer
- EXE (NSIS)
- Version
- 1.0.0
- Released
- December 20, 2023
- Added to the catalogue
- June 20, 2025
- Versions listed
- 1
- Website
- thorlabs.com
- winget ID
- Thorlabs.QEPAS
Ratings and reviews
No reviews yet. Be the first to rate it.
Frequently asked questions
Is QEPAS free?
QEPAS 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 QEPAS 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 QEPAS 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 QEPAS be installed silently?
Yes. The silent install page lists the exact command for each installer.
Does QEPAS run on ARM (Windows on Arm)?
There is no ARM64 build; Windows 11 on Arm can run the 64-bit version through emulation.