LAM12 Large Article Monitor
Monitor for contamination checks and clearance of large articles, with four detectors around a 750 × 600 × 600 mm measuring chamber.
The LAM12 helps ensure that large articles leaving the controlled area of a nuclear facility are within regulatory limits for radioactive contamination. It shares its electronics and touchscreen with the SAM12 and is available in four versions: standard, with a low energy copper and aluminium filter set, with a weigher scale, or with both. Older LAM4 monitors can be upgraded with LAM12 electronics.
- Measures fixed, smearable, internal and external gamma contamination simultaneously
- Measures down to clearance levels below 0.4 Bq/g for gamma-emitting radionuclides
- Natural Background Reduction (NBR) discriminates between NORM and man-made radiation
- Cobalt Coincidence Monitoring (CCM), insensitive to fluctuating gamma background
- QuickScan reduces counting time when articles are clearly clean or clearly contaminated
- Optional weigher scale, so the specific activity (Bq/g) can be assessed and displayed
No prices online – you will receive a quotation with price and delivery time. Need accessories? Mention them in your request.
Technical data
| Detectors | Four BC-412 plastic scintillation detectors, 600 × 300 × 50 mm each (front door, back and two sides) |
|---|---|
| Radiation type | Gamma |
| Energy range | 50 keV to 2 MeV |
| Typical 4π efficiency in centre of chamber | ⁶⁰Co 24 %, ¹³⁷Cs 12 %; low energy option ²⁴¹Am 2.5 %; CCM ⁶⁰Co 0.2 % |
| MDA (30 s, 0.1 µSv/h background) | ⁶⁰Co 95 Bq, ¹³⁷Cs 185 Bq; low energy option ²⁴¹Am 1600 Bq |
| MDA (30 s, 1 µSv/h background) | ⁶⁰Co 300 Bq, ¹³⁷Cs 650 Bq |
| Minimum specific activity detectable | < 0.1 Bq/g of ⁶⁰Co averaged over 5 kg |
| Spatial uniformity of response | ±30 % at 68 % confidence, for ¹³⁷Cs |
| Measuring volume (H × W × D) | 750 × 600 × 600 mm |
| Dimensions (H × W × D) | 1400 × 935 × 975 mm |
| Lead shielding | 25 mm, 4π |
| Weight | 1350 kg net |
| Weigher option | 0.5 to 60 kg, 570 × 570 mm platform, 0.02 kg resolution |
| Power | 85 to 264 VAC, 47 to 63 Hz, 65 VA; integral 12 V power pack for 8 hours |
| Digital I/O connections | Ethernet and 4 USB |
| Operational temperature | 0 °C to +45 °C; up to 95 % RH non-condensing, IP50 |
Source: Thermo Fisher Scientific, LAM12 datasheet (2019). Full specifications are available in the documents.
