Bild: ORTEC
Four-detector alpha/beta counter for high sample throughput
Alpha/beta counter with four gas-flow detectors for applications that need high sample throughput and low detection limits. Each detector has its own sample drawer with independent start and stop and true “Count to MDA”; detectors and electronics are reached from the front and a window is changed in under 10 minutes without stopping the other detectors. Controlled from a computer with Vista 2000.
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 | Four pancake-style gas-flow proportional detectors, Ø5.7 cm, with cosmic guard detector1 |
|---|---|
| Window | Aluminised, 80 µg/cm²; changed in under 10 minutes without interrupting the other detectors1 |
| Sample geometry | Planchets Ø5.1 cm (2 in), 1/8, 1/4 or 5/16 in deep1 |
| Detector uniformity | 95% over active area1 |
| Typical detection efficiency | Top (~1 mm from window) / 1/8″ / 1/4″ / 5/16″ bottom: ²³⁹Pu 35/31/25/24%, ⁹⁰Sr/Y 55/47/40/39%, ⁹⁹Tc 35/33/28/26%, ⁶³Ni 15/11/7/5%1 |
|---|---|
| Background rate | Alpha, shielded and guarded: warranted <0.1 cpm, typical <0.05 cpm (natural background 8 µR/h)1 |
| Count rate and dead time | 300,000 cpm with <1.5% dead time1 |
|---|
| Sample capacity | 4 samples, manual; each detector has its own drawer with independent start and stop1 |
|---|
| Software | Computer controlled; data export with Vista 20001 |
|---|
| Communication | USB computer control (the unit is operated from a computer)1 |
|---|
| Power supply | 110–240 V AC, 50–60 Hz; <2 A at 110 V AC, <1.0 A at 240 V AC1 |
|---|
| Dimensions | 16 × 32 × 22 in (H × W × D)1 |
|---|---|
| Weight | 544 kg (shipping 635 kg); the support surface must bear 1,200 lb per unit1 |
| Options | MDS control pack ORT-MDS-CTRL (Vista 2000, RS232/485 interface, null modem cable and gas regulator); ORT-MDS-RACK rack for two MPC-9604 units1 |
|---|
| Count modes | Alpha only; alpha then beta; alpha/beta simultaneously1 |
|---|---|
| Cross talk | Alpha to beta <0.1%; beta to alpha <0.1%1 |
| Plateau | Alpha <1.5%/100 V, length >1000 V; beta <5%/100 V, length >200 V1 |
| Counting gas | P-10, nominally 60 cc/min with a critical flow orifice, inlet pressure 10 psi (±2 psi); Gas-Pro halts counting on a gas fault1 |
| Lead shielding | 10.16 cm (4 in) low-background lead1 |
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.
Alpha/beta counter control and analysis software for radiochemistry
Automatic low-background alpha/beta counter, 50 or 100 samples
Automatic gasless alpha/beta counter with sample changer
Automatic alpha/beta counter with a large detector for air filters
We help you choose the right configuration, detector and accessories for your measurement task.
ORTEC (AMETEK)