
WPC-1050-GFW-2
Automatic low-background alpha/beta counter, 50 or 100 samples
- Detector type
- Pancake-style gas-flow proportional detector, Ø5.7 cm
- Weight
- 50 samples: 195 kg; 100 samples: 200 kg

Bild: ORTEC
Automatic alpha/beta counter with a large detector for air filters
Automatic low-background counters with a 3.5 in or 5 in gas-flow proportional detector, aimed at health physics and environmental applications. They suit large-diameter air filters from high-volume air samplers and have a colour touch screen, cosmic guard detector and 10 cm of lead.
Download product sheet (PDF)All values with references – for tender documents
Specifications checked against the manufacturer’s documents on 2026-10-17
The number after each value refers to the source listed below. Values are as published by the manufacturer; the exact configuration is always confirmed in our quotation.
| Detector type | Pancake-style gas-flow proportional detector, Ø8.9 cm (GFW-3) or Ø12.7 cm (GFW-5)1 |
|---|---|
| Window | Aluminised, 80 µg/cm²1 |
| Guard detector | 1 large gas-flow proportional detector1 |
| Sample geometry | Custom planchet sizes; planchets up to 5/16 in deep; active detector area 3.5 in (8.9 cm) or 5 in (12.7 cm)1 |
| Typical detection efficiency | ²³⁰Th 27%, ⁹⁰Sr/⁹⁰Y 63%, ⁹⁹Tc 41%, ⁶³Ni 20%1 |
|---|---|
| Background rate | Typical, 3.5 in: alpha 0.3 cpm, beta 1.5 cpm; 5 in: alpha 0.4 cpm (0.5 warranted), beta 4 cpm (5 warranted)1 |
| Sample capacity | Automatic 50-sample changer with barcode reader, sample range 1–9991 |
|---|
| Software | Vista FC (health physics) and Vista 2000 (radiochemistry) as options1 |
|---|
| Communication | Data export via USB flash drive and RS-4851 |
|---|---|
| User interface | Built-in colour touch screen1 |
| Power supply | 117 V AC, <0.2 A, 50/60 Hz or 230 V AC, <1.0 A, 50/60 Hz1 |
|---|
| Counting gas | P-10, 60 cc/min at 10 psi; Gas-PRO fail-safe monitoring senses breaches in gas flow1 |
|---|---|
| Lead shielding | 10 cm (4 in) lead1 |
| Count modes | Alpha only; beta only; alpha/beta simultaneously1 |
| Cross talk | Alpha to beta <0.1%; beta to alpha <0.1%1 |
| Use | Health physics and environmental work; large-diameter air filters from high-volume air samplers1 |
The data comes from the manufacturer’s published documents. Manufacturers may change specifications; the current configuration and performance are confirmed in the quotation.
The number after each value refers to the source listed below. Values are as published by the manufacturer; the exact configuration is always confirmed in our quotation.

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We help you choose the right configuration, detector and accessories for your measurement task.