Authorised Indian Distributor
Saxsons Group
New Delhi, India · Since 1997
Vexcal AV03 Dose CalibratorIonisation Chamber Activity Meter
A pressurised-ionisation-chamber dose calibrator with 5-second measurement cycle, MBq and mCi readout, and user-configurable calibration factors per isotope and per source geometry. CDSCO approved and AERB compliant — the essential activity meter for every nuclear medicine hotlab and radiopharmacy.
Key Features
- Pressurised well-type ionisation chamber for all diagnostic and therapeutic radionuclides
- 5-second measurement cycle for fast, high-throughput dose dispensing
- Dual display: MBq and mCi — switchable per operator preference
- CDSCO approved and AERB-compliant — meets the Indian medical-device and nuclear-medicine regulatory requirements
- User-configurable calibration factors per isotope **and** per source geometry (vial, syringe, dose pot, dose dispenser, capsule) — the operator establishes the factor empirically against a NIST-traceable reference of known activity in the same geometry used for patient doses
All Features
- Pressurised well-type ionisation chamber for all diagnostic and therapeutic radionuclides
- 5-second measurement cycle for fast, high-throughput dose dispensing
- Dual display: MBq and mCi — switchable per operator preference
- CDSCO approved and AERB-compliant — meets the Indian medical-device and nuclear-medicine regulatory requirements
- User-configurable calibration factors per isotope **and** per source geometry (vial, syringe, dose pot, dose dispenser, capsule) — the operator establishes the factor empirically against a NIST-traceable reference of known activity in the same geometry used for patient doses
- No pre-programmed isotope factors — the manufacturer does not ship assumed-geometry calibration factors, because the chamber response to the same isotope changes with vial type, fill volume, syringe shielding and dose-pot dimensions, and an assumed factor would mask real geometry-dependent accuracy errors
- Touchscreen tablet readout via standard USB — clear under hotlab lighting
- Internal battery on the ionisation chamber — maintains stability during power outages
- Built-in QA memory — stores constancy, accuracy and linearity records
- Automatic background subtraction — accurate measurements in high-activity environments
- Data logging for NABH and AERB audit trail
- PC connectivity via USB for records management
- Low maintenance — sealed ionisation chamber, no consumables required
Technical Specifications
| Detector type | Pressurised well-type ionisation chamber |
| Calibration factors | Operator-set per isotope **and** per source geometry — no pre-programmed factors. The hotlab establishes the factor against a NIST-traceable reference of known activity in the same geometry used for patient doses. |
| Geometry handling | Independent stored factor per geometry (vial, syringe, dose pot, dose dispenser, capsule). Adding a new container type means establishing and storing a new factor before clinical use. |
| Measurement time | 5 seconds per reading |
| Activity display units | MBq and mCi (switchable) |
| Activity range | kBq to GBq scale (isotope- and geometry-dependent) |
| Reproducibility | ≤ 0.5% |
| Background correction | Automatic background subtraction |
| User interface | Touchscreen tablet, dedicated software, USB connection to ionisation chamber |
| Power resilience | Internal battery on ionisation chamber — maintains stability during power outages |
| Data output | Touchscreen readout; USB connectivity for records / printing |
| Compliance | CDSCO approved (Indian medical-device registration); AERB Technical Standards for Nuclear Medicine Facilities |
Applications
Activity measurement — the foundation of nuclear medicine QA
Pre-dispensing Activity Verification
Measure generator eluate, radiopharmaceutical preparations and unit doses before patient administration. Mandatory QA step in every nuclear medicine hotlab.
Post-radiolabelling QC
Verify final product activity after Tc-99m cold-kit labelling, Ga-68 synthesis or Lu-177 DOTATATE preparation. Confirms dispensing accuracy before release.
Waste Activity Measurement
Measure residual activity in vials, syringes and waste containers for radioactive decay management and AERB-compliant waste disposal records.
Therapy Dose Preparation
Accurate activity measurement for high-dose I-131 and Lu-177 therapy preparations. 5-second cycle minimises operator exposure during high-activity measurements.
Generator Calibration Checks
Eluate activity measurement post-elution to verify generator yield and confirm consistency with stated calibration values.
Constancy and Linearity QC
AERB-required daily constancy checks and periodic linearity testing. Built-in logging and print functions support regulatory audit trails.
Why Vexcal AV03 Dose Calibrator?
A calibration factor is not just isotope-specific — it is isotope **and** geometry specific. The same Lu-177 activity in a 10 mL P6 vial reads differently from a 3 mL syringe or a tungsten dose pot. The Vexcal stores an independent factor for every isotope-geometry combination the lab uses, so the operator is never relying on a pre-programmed factor that silently assumes the wrong container.
A 5-second cycle keeps pace with busy morning dispensing sessions — measure, record, move on. Critical for PET departments where Ga-68 half-life (68 min) demands rapid workflow from synthesis to patient.
CDSCO approval covers the Indian medical-device registration. AERB Technical Standards for Nuclear Medicine Facilities frame the dose calibrator QA requirements — daily constancy, annual accuracy, periodic linearity, geometry-specific factors. The Vexcal supports the full workflow with documented records the inspection officer expects.
Catalogs & Resources
Manufacturer product brochure and English user manual. Contact Saxsons for AERB documentation, training and India pricing.
Vexcal AV03 — product brochure
Manufacturer product brochure covering specifications, ionisation chamber, tablet interface and accessories.
Vexcal AV03 — user manual (English)
Manufacturer user manual — instrument operation, isotope and geometry-specific calibration factor setup, daily / monthly / annual QA workflows.
Vexcal AV03 Dose Calibrator
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FAQ
Dose calibrator — questions we hear from Indian nuclear-medicine teams
What a dose calibrator does vs a survey meter, why isotope + geometry calibration factors both matter, what the AAPM TG-181 daily / quarterly / annual QA cadence looks like, and which isotopes the calibrator supports.
Q.What does a dose calibrator do that a survey meter cannot?
A survey meter reads ambient dose rate — useful for area monitoring. A dose calibrator measures absolute activity of a radiopharmaceutical inside a shielded ionisation chamber, calibrated per isotope and per vial / syringe geometry. Every patient dose passes through the dose calibrator on the way from the dispensing bench to the injection room — the number on the calibrator screen is what the department bills, what the referring physician trusts, and what the AERB inspection reads.
Q.Why does the calibration factor have to be isotope AND geometry specific?
Different isotopes emit different photon energies; different vial or syringe geometries put different amounts of material between the source and the ion chamber. A calibration factor optimised for Tc-99m in a 10 cc vial is wrong for I-131 in a 3 cc syringe. Every clinical isotope × geometry combination the department handles needs its own calibration factor. A dose calibrator without per-isotope + per-geometry factor management is a source of systematic activity error.
Q.What is the daily / annual QA cadence for a dose calibrator?
AAPM TG-181 sets the QA framework: daily constancy check (usually against a long-lived reference source like Co-57 or Cs-137), quarterly linearity check (verifies the calibrator reads correctly across the activity range), and annual accuracy verification (against a NIST-traceable reference standard). The Saxsons dose calibrator streamlines the daily constancy read into a single one-touch operation so the QA cadence stays on schedule.
Q.Which isotopes and workflows does the calibrator support?
Every diagnostic and therapeutic isotope on the routine Indian NM bench — Tc-99m (SPECT workhorse), F-18 / Ga-68 (PET), Lu-177 / Y-90 (theranostics / therapy), I-131 (thyroid therapy), In-111, Ga-67, Sm-153, Sr-89. Isotope presets are configurable so the department is not manually entering calibration factors between measurements.
Q.How is the dose calibrator supplied and supported in India?
Distributed across India by Saxsons Group. Supply covers the calibrator, isotope-preset configuration for the department's isotope mix, commissioning, applications training and NIST-traceable calibration verification. AERB-registered for nuclear-medicine dispensing use.
Vexcal AV03 Dose Calibrator supplier in India — Saxsons Group
Saxsons Group has supplied nuclear medicine equipment to over 1,000 Indian hospitals since 1988. Every consignment of Vexcal AV03 Dose Calibrator ships with cold-chain logistics, AERB import documentation, CDSCO registration references and a Certificate of Analysis delivered before dispatch — the paperwork your radiation-safety and procurement teams need, pre-assembled.
- Nationwide delivery footprint — every metro and tier-2 city in India, scheduled to your treatment / procedure calendar.
- AERB & CDSCO documentation — import licence, radiation-safety paperwork and RSO briefing pre-assembled for the audit file.
- 40+ years in Indian oncology — long-standing supply relationships with AIIMS, Tata Memorial, and hundreds of tertiary-care centres.
- Single point of accountability — one purchase order, one delivery contact, one after-sales team across the whole product family.
Also supplied by Saxsons Group across India
The essential activity meter for your nuclear medicine department
Contact Saxsons Group for pricing, AERB compliance documentation and demonstration of the Vexcal AV03 dose calibrator in India.