Table of calculation for the low limit detection with the new developed BWLM ( Radon/Thoron-Progeny-Monitor).
The operation of the instrument by using a different sampling volume and / or a different sampling time is given a different lower limit of detection.
Detector Efficiency=0.2 ( 20%)
Method | Air-Flow Rate (l/h) | Measuring Time (min) | EEC LLD (Bq/m3) |
Markov | 100 | 3 | 12 |
Markov | 800 | 3 | 2 |
Continuous slow | 100 | 10 | 0.3 |
Continuous slow | 100 | 60 | 0.1 |
Continuous slow | 800 | 10 | 0.03 |
Continuous slow | 800 | 60 | 0.01 |
Continuous fast | 100 | 10 | 20 |
Continuous fast | 100 | 60 | 5 |
Continuous fast | 800 | 10 | 3 |
Continuous fast | 800 | 60 | 0.8 |