Brochure for the LB 150 D-R α-β Fixed Filter Monitor
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General
- Simultaneous measurement of artificial alpha and beta aerosols
- Direct measurement of activities at the dusting site
- Compensation and measurement of natural radioactivity (Rn/Tn daughters)
Features
- 3-way large area proportional detector with high alpha and beta efficiency
- Accumulation of aerosols on a 200 mm Ø large-area filter
- Continuous measurement and alarm check during dusting
Additional Features
- Energy-independent measurement method
- Independent of radon/thoron ratio
- Largely independent of the state of equilibrium of the radon/thoron derivatives (dependent on air extraction at the installation site)
Product Overview
LB 150 D-R
Application
The Alpha-Beta-particulates monitor LB 150 D-R can be deployed for the measurement of airborne artificial Alpha and Beta activity in
- Nuclear facilities in the Nuclear fuel cycle and Fission product production
- Storage and processing of Nuclear waste products
- Hot Cell Labs
- Monitoring of Alpha emitting (transuranic) substances
The Particulates Monitor LB 150 D-R uses a fixed filter and is a true real time Monitor while collection, detection and evaluation are done simultaneously.
Sampling
The very high sampling rate of 40 m³/h ensures a representative sampling for both Stack monitoring with Isokinetic extraction as well as Room or workplace air monitoring.
Particulates collection and Detector
The sampled air is drawn through an S-class glass fiber filter with 200 mm Ø. The detector, a large surface proportional counter with thin entrance window, is located directly above the collection area at a distance of 7 mm and measures the radiation intensity from Alpha and Beta decays.
The airtight particulates collection unit can be constructed in Stainless steel or in Teflon depending on the application.
200 mm ∅ Filter support sinter plate with drawer mechanism
Technical Data
| Pump | silent turbine pump |
| Filter disk | glas fiber filter, S-class No. 8, Ø 200 mm or equivalent |
| Ambient Conditions | |
| Ambient temperature | 0 to 50 °C |
| Sample air temperature | up to 85°C |
| Humidity | max. 95 % rel. humidity |
| Detector | |
| Type | 3-fold Proportional counter tube GFDZ 200 in Sandwich construction |
| Lead shield | 4 pi 2 cm (5 cm optional) |
| Counting gas | Methane, Natural Gas, Propane P10 or Ar-CO2 90/10 |
| Gas consumption | approx. 2 l/h |