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Ion chamber survey meter for gamma, X-ray and beta dose rate and dose
Portable, battery-operated, auto-ranging ion chamber survey meter for stable and accurate measurement of dose rate and integrated dose from gamma, X-ray and beta radiation. It can measure X-ray bursts from 5 picosecond pulses, which suits X-ray and NDT applications, and now has USB for power and data transfer.
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 | Ion chamber, 500 cc; wall and cover 300 mg/cm² (tissue equivalent); window 7 mg/cm²1 |
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| Accuracy | ±10% of reading within the measuring range1 |
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| Measurement range | 1 µSv/h – 500 mSv/h (0.1 mR/h – 50 R/h)1 |
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| Sensitivity | 172 cps per mR/h (0.1–250 mR/h); 1.72 cps per mR/h (250 mR/h – 50 R/h)2 |
| Energy response | Gamma: better than ±20% at 20 keV–1.3 MeV (relative to ¹³⁷Cs); beta: better than ±20% from 200 keV2 |
| Angular dependence | Less than ±5% within ±120° of the front direction (¹³⁷Cs)2 |
| Response time | 2 s for readings above 1 mR/h; 5 s for an auto-ranging change from low to high range1 |
| Display range | 0.1 µSv/h – 500 mSv/h (0.01 mR/h – 50 R/h)1 |
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| Display | DigiLog: 3 digits and a 2-decade analogue bar graph1 |
| Data storage | 347 data records (1,415 with extended memory)1 |
| Power supply | Two 1.5 V alkaline C cells, 100 hours of continuous operation; USB connector for both power and data1 |
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| Operating temperature | −10 to +50 °C1 |
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| Options | 6 MeV energy moderating sleeve and cover1 |
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| Ordering code | DigiLog HR: BAK-1940 (µSv/h), BAK-1920 (mR/h); DigiLog LR: BAK-1950, BAK-1930; DigiLog X: BAK-2000, BAK-2005 (HR), BAK-2010, BAK-1990 (LR)1 |
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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Rotem Industries