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.
The Big Bottle System gives results after 120 minutes of analysis, or less, with a sensitivity that far exceeds that of liquid scintillation methods. The method is simple and straightforward, and there are no harmful chemicals to use. Once the procedure becomes familiar and well understood it will produce accurate results with minimal effort.
Soda Bottle Aerator Kit Accessory
For added convenience and versatility, the Big Bottle System can be used with standard soda bottles of any size from 500ml to 2L. This configuration requires the Soda Bottle Aerator Kit accessory, which features an aerator system similar to that used with the standard 2.5L glass jug.
Larger bottles allow for greater precision and lower limits of detection. With a 500ml bottle, it is possible to measure comfortably down to below 5 pCi/L (200 Bq/m3). With a 2L bottle it becomes possible to measure down to 1 pCi/L (37 Bq/m3).
CAPTURE Software Integration
DURRIDGE’s CAPTURE software makes it easy to download and analyze data recorded using the Big Bottle System. The program provides controls for identifying the specific experiment configuration, and it automatically calculates radon concentrations with respect to the the specified water temperature and volumes. The software is free to use and is available for download here.
Big Bottle System Physical Specifications
|Glass Bottle System Shipping Dimensions||17″ x 17″ x 17″ (43 cm x 43 cm x 43 cm)|
|Glass Bottle System Shipping Weight||11 pounds (5.0 kg)|
|Soda Bottle System Shipping Dimensions||14″ x 14″ x 14″ (36 cm x 36 cm x 36 cm)|
|Soda Bottle System Shipping Weight||5 pounds (2.3 kg)|
|Retort Stand Shipping Dimensions||37″ x 8″ x 2″ (94 cm x 20 cm x 5 cm)|
|Retort Stand Shipping Weight||6 pounds (2.7 kg)|
Big Bottle System Kits
Kits are available for two sample size ranges. Each kit contains the necessary individual components, listed below, plus the appropriate coupler-cap.
Note: In February 2019 the design of the Big Bottle System was updated from Revision B to Revision C. The updated product includes a redesigned Aerator Kit and Tubing Set. The older Revision B components have been discontinued and are no longer available.
The individual components are also available to purchase separately:
Glass Jug Aerator Kit
Includes Screw-On Aerator Cap, Aerator Stones, and Check Valve
Soda Bottle Aerator Kit
Includes Screw-On Aerator Cap, Aerator Stone, and Check Valve
Retort Stand & Clamp
Big Bottle System Tubing Set
2.5L Glass Jug
With Teflon lined cap
Temperature Logger Kit
Includes USB Temperature Logger, Hermetically Sealed Thermocouple, and Elastic Clinching Strap with Foam
Laboratory Drying Unit
(Not included in Big Bottle System kits)
Glass Jug Shoulder Bag
See PDF for details
Big Bottle System with Aerator and Temperature Data Logger
DURRIDGE Soda Bottle Aerator Kit for the Big Bottle System
The Aerator Cap has undergone revisions to improve ease of use and reduce the risk of water entering the desiccant.