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LB 1342/ LB 1343

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LB 1342/ LB 1343

contamination-monitor health-physics

PRODUCT DESCRIPTION

Contamination detectors with ZnS scintillators use a single scintillator made of zinc sulfide (ZnS) to measure the radioactivity. The radiation to be measured strikes the scintillator. The resulting flashes of light are conducted by a suitable reflector to a photomultiplier with a suitable preamplifier and discriminator stage and measured. Using special evaluation and correlation circuits, the individual types of radiation such as alpha and beta/gamma/X-ray radiation are distinguished, separated and measured simultaneously (patented by BERTHOLD). Part of the spillover of alpha particles into the beta channel is corrected by software.

Project Details

SCINTILLATION PROBES WITH ZNS FOR CONTAMINATION MEASUREMENTS

Currently, two scintillator probes are available: LB 1342 with 170 cm² surface and LB 1343 with 345 cm² surface.

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.

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,
beta channel: approx. 10cps		 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
(no condensation)temperature range storage: -40°C to +60°C		 temperature range operation: -20°C to +40°C
(no condensation)temperature range storage: -40°C to +60°C
Protection type IP53 IP53
Light-proof/ Entrance window Sunlight      <10cps Sunlight      <10cps

Brochure

We are a family-owned OEM in the field of Nuclear Energy, Nuclear Medicine & Life Sciences with Sales & Distribution processes. We synergize with the best in the Industry, to bring to the fore high performance analytical instruments.

Contact Us

Phone: 040–40180256, 040-27125856
Email: info@nokitechnologies.com
Address:  Module 206 & 407, NSIC, EMBDP Building, Kamalanagar, ECIL, Hyderabad, 500062.