Authorised Indian Distributor
Saxsons Group
New Delhi, India · Since 1997
QA BeamChecker™ PlusDaily Linac QA Device
Eight vented ion chambers in a single setup — output, flatness, symmetry and energy constancy for every photon and electron energy on the machine. Wireless operation, automatic energy detection, ready for the next beam in ten seconds.
Key Features
- Eight fully guarded vented ionization chambers — 1 centre, 4 quadrant (7.5 cm from centre), 3 energy-ID
- Photon energies from 60Co to 25 MV in a single setup
- Electron energies 6 MeV to 25 MeV in the same setup as photons
- Automatic energy detection — deliver beams in any order, no manual selection
- Dose rates up to 2400 MU/min — FFF-beam compatible
All Features
- Eight fully guarded vented ionization chambers — 1 centre, 4 quadrant (7.5 cm from centre), 3 energy-ID
- Photon energies from 60Co to 25 MV in a single setup
- Electron energies 6 MeV to 25 MeV in the same setup as photons
- Automatic energy detection — deliver beams in any order, no manual selection
- Dose rates up to 2400 MU/min — FFF-beam compatible
- Wireless operation — no cables to the linac console
- Ready for the next measurement within 10 seconds
- Supports IMAT, VMAT, TomoTherapy and dynamic-wedge delivery verification
- Compatible with Varian, Elekta, Accuray and Siemens linacs
- PC workflow on Windows 10 Pro (64-bit) — or operate standalone
- Daily output, flatness and symmetry constancy across every modality
- Designed for the daily portion of the AAPM TG-142 / TG-198 QA programme
Technical Specifications
| Detector type | 8 vented, fully guarded ionization chambers |
| Chamber volume | 0.6 cm³ per chamber |
| Chamber geometry | Parallel-plate, 4.0 mm separation, 1.39 cm collection electrode |
| Chamber layout | 1 centre + 4 quadrant at 7.5 cm + 3 energy-ID chambers |
| Photon range | 60Co to 25 MV (all clinical energies including FFF) |
| Electron range | 6 MeV to 25 MeV |
| Dose-rate range | Up to 2400 MU/min (FFF compatible) |
| Beam-energy detection | Automatic — no manual selection needed between beams |
| Delivery types | Static, IMAT, VMAT, TomoTherapy, dynamic wedge |
| Communication | Wireless — operates independently of QA management software |
| PC requirements | Windows 10 Pro (64-bit) when used in PC mode |
| Compatible linacs | Varian, Elekta, Accuray, Siemens |
| Standards alignment | AAPM TG-142 daily QA (Klein 2009) / TG-198 (Hanley 2021) |
Applications
The daily morning check — every modality, one setup
Daily output constancy
Verify linac output every morning across every photon and electron energy. Automatic energy detection means therapists deliver beams in any sequence — no device reset between energies.
Flatness & symmetry
Four quadrant chambers at 7.5 cm from the centre capture radial and transverse profile constancy on every beam.
VMAT / rotational delivery
Dose rates to 2400 MU/min and rotational delivery support let the device serve daily VMAT and IMAT machine checks alongside static beams.
FFF beam daily checks
Built for the high dose-per-pulse seen on TrueBeam HDRS and Versa HD FFF deliveries. No saturation correction needed at the dose rates documented in the brochure.
Therapist-led daily QA
Wireless, standalone operation lets RTTs complete the morning constancy check independently — physicist review happens later, on the saved data.
TG-142 / TG-198 daily
Covers the output / profile-constancy portion of the daily-QA test set in the AAPM Task Group reports. Mechanical and imaging daily tests run on separate tools.
Why QA BeamChecker Plus?
A single centre chamber gives output, four quadrant chambers at 7.5 cm give radial and transverse profile constancy, and three energy-ID chambers let the device recognise the delivered beam automatically. One setup, every photon and electron energy.
The device records, calculates and reports on its own — no console cable, no laptop in the bunker. Standalone for the morning check; the PC software is there when you want trending or batch export.
Automatic energy detection plus a 10-second readiness window means the full daily-QA list across photons and electrons completes faster than energy-by-energy chamber swaps.
Catalogs & Resources
Manufacturer datasheets. AAPM task-group reports, the 10-year Santa Chiara user-experience case study and the Keister clinical-experience talk are on the Knowledge Hub — link above.
Product Demonstrations
Manufacturer product overviews. The user-perspective clinical talk (Justin Keister, Advocate Aurora Health) lives on the Knowledge Hub.
QA BeamChecker™ Plus
More for this product
Each card opens a focused post for a specific specialty — peer-reviewed evidence and clinical workflow, written for the persona you select.
For Medical Physicist
TG-142 daily coverage — what 8 chambers do (and don't)
Output, profile and energy constancy live on the array. Mechanical, safety and imaging daily checks stay on other tools. The split, sourced to Klein 2009 and Hanley 2021.
Read thisMedical PhysicistComplete your daily QA before you finish your coffee
Eight chambers cover every photon and electron energy in one setup. Automatic energy detection means any order. ~10 s between beams. Where does the morning actually go on a chamber chain — and what changes?
Read thisBring daily QA down to a single setup
Contact Saxsons Group for pricing, demo arrangement, AERB import documentation and installation support for the QA BeamChecker Plus.