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Table of calculation for the low limit detection

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