The Brochure for LB 134 UMo II Universal Monitor
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General
- High measuring accuracy
- Precise distinction of radiation types
- High sensitivity even at low energies
- Low costs for the scintillator
- Ease of maintenance
SCINT Technology
- Unique simultaneous and separate measurement of α and β-y radiation
- The individual types of radiation can be distinguished by means of special evaluation and correlation circuits, and thus separated and measured at the same time.
- No counting gas required
Additional Features
- Results can be displayed either as a count rate (cps = counts per second) or as area activities (Bq/cm²)
- A metal grid protects the entrance window of the detector against damage
Different versions
LB 1342
The window foil of the detector is sensitive to mechanical damage. It is therefore protected by a protective grid. However, everything should be done to avoid destruction of the window foil (sharp objects, measurement on stubble fields, rose bushes and cat's paws!).
Nevertheless a damaged detector window foil can easily be replaced by the user. BERTHOLD supplies a foil stretched over a frame as spare part.
- LB 1342 ZnS scintillation detector 170cm² α, β and γ contamination
- 118 mm x 145 mm (170 cm²) at a transmission of 80%
Background: alpha channel approx. 0.1cps, beta channel approx. 10cps
The measuring results are presented on the easy to operate battery Universal Monitor (UMo II) LB 134 with display, data storage and printer output.
LB 1343
- LB 1343 ZnS scintillation detector 345 cm² α ,β and γ contamination
- It is protected by a protective grid
- A damaged detector window foil can easily be replaced by the user. BERTHOLD supplies a foil stretched over a frame as spare part.
- Background: alpha channel approx. 0.1cps, beta channel approx. 15cps
The measuring results are presented on the easy to operate battery Universal Monitor (UMo II) LB 134 with display, data storage and printer output.
Technical Data
| LB 1342 | LB 1343 | |
| Sensitive detector area | 118mm x 145mm, 170 cm² | 150 mm x 230 mm, 345 cm² |
| Entrance window | layer thickness: 6 µm weight per unit area: 0.4 mg/cm² | layer thickness: 6 µm weight per unit area: 0.4 mg/cm² |
Geometric transmission | 80% | 80% |
| Background | Alpha channel: approx. 0.1cps, | Alpha channel: approx. 0.1cps, beta channel: approx. 15cps |
| Sensitivity to 1 µSv/h external gamma radiation (Cs-137) | alpha channel: not detectable beta channel: < 100cps | alpha channel: not detectable beta channel: < 100cps |
| Spillover | alpha into beta channel (Po-210): < 20% beta into alpha channel (Sr-90): < 2*10-5 | alpha into beta channel (Po-210): < 20% beta into alpha channel (Sr-90): < 2*10-5 |
Local variation responsiveness | both channels: ±20% | both channels: ±20% |
| Temperature range | temperature range operation: -20°C to +40°C temperature range storage: -40°C to +60°C | temperature range operation: -20°C to +40°C temperature range storage: -40°C to +60°C |
| Protection type | IP53 | IP53 |
| Light-proof/ Entrance window | Sunlight <10cps | Sunlight <10cps |