
WPC-1150-GFW-3/GFW-5
Automatic alpha/beta counter with a large detector for air filters
- Detector type
- Pancake-style gas-flow proportional detector, Ø8.9 cm (GFW-3) or Ø12.7 cm (GFW-5)
- Weight
- 816 kg

Bild: ORTEC
Automatic low-background alpha/beta counter, 50 or 100 samples
General-purpose low-background counter for health physics and radiochemistry, with automatic sample changer and barcode reader. The pancake gas-flow detector sits in 10 cm of lead with a cosmic guard detector, the window is easy to replace and Gas-PRO monitors the gas flow. An improved design of the WPC-9550.
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, Ø5.7 cm1 |
|---|---|
| Window | Aluminised, 80 µg/cm²; easy to replace1 |
| Guard detector | 1 gas-flow proportional detector (cosmic guard)1 |
| Sample geometry | Planchets Ø5.1 cm (2 in), 1/8, 1/4 or 5/16 in deep (3.2, 6.3 or 7.9 mm)1 |
| Typical detection efficiency | Top / 1/8″ / 1/4″ / 5/16″ bottom: ²³⁹Pu 35/31/25/24%, ⁹⁰Sr/Y 51/47/40/39%, ⁹⁹Tc 39/33/28/26%; with optional dual-anode detector: ²³⁹Pu 38%, ⁹⁰Sr/Y 53%, ⁹⁹Tc 35%, ⁶³Ni 15%1 |
|---|---|
| Background rate | With lead and guard: warranted alpha <0.1 cpm, beta <0.9 cpm (typical 0.05 and 0.7); with dual-anode detector beta <1.0 cpm warranted1 |
| Sample capacity | Automatic changer for 50 samples (100 optional) with barcode reader, sample range 1–9991 |
|---|
| Software | DUO Express for programming, data management and control charts; Vista 2000 (radiochemistry) and Vista FC (health physics) as options1 |
|---|
| Communication | Data export via USB PIC Link and USB flash drive1 |
|---|---|
| User interface | Touch screen1 |
| Power supply | 110–240 V AC, 50–60 Hz1 |
|---|
| Dimensions | 50 samples: 83.8 × 81.3 × 63.5 cm; 100 samples: 129.5 × 81.3 × 63.5 cm (H × W × D)1 |
|---|---|
| Weight | 50 samples: 195 kg; 100 samples: 200 kg1 |
| Counting gas | P-10, 60 cc/min at 10 psi; Gas-PRO fail-safe monitoring senses breaches in gas flow1 |
|---|---|
| Lead shielding | 10.2 cm (4 in) lead1 |
| Count modes | Alpha only; alpha/beta simultaneously; alpha then beta1 |
| Use | Health physics and radiochemistry, for example smears and air filters1 |
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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