The Big Bottle System is an accessory for the RAD7 that enables users to measure radon in 2.5L water samples with high sensitivity. The lower limit of detection is well below 1 pCi/L (40 Bq/m3) radon concentration in water. The upper operating limit is 10,000 pCi/L (400,000 Bq/m3). For ranges higher than that, the standard RAD H2O accessory is recommended.
The Big Bottle System consists of several components, including the Tubing Set, Support Stand, Elastic Clinching Strap, USB Temperature Logger, Hermetically Sealed Thermocouple, and two 2.5 L Glass Bottles. The tubing set includes a check valve, aerating stones, and aerator cap. A RAD7 is required, as is either a Laboratory Dryer or DRYSTIK.
The complete system (excluding the optional DRYSTIK), is portable and battery operated, and the measurement is moderately fast. Even for the lowest radon concentrations you can have an accurate reading of radon in the water within two hours of taking the sample.
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