Negative Positive
Title: Safety Siren Pro Series 3: lengthy equilibration period ...
Review: We located this detector per instructions in our basement. The inital reading at 48 hours was 9.5 pCi. This increased to 9.9 at 52 hours and thereafter dropped steadily at a rate of 0.1 every 1 hour. At 73 hours the reading is (now) 7.4 pCi/liter. One explanation for this, is the occurence of one or two very large spikes in radon levels which temporarliy increased the running average. Another, I think more likely, explanation is that the device is not working properly, at least during the inital week. As the readings should have been accurate from 48 hours on, I am rather skeptical regarding the reliability of this detector, and may decide to return it. We are doing canister measurements in parallel.
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