Bailers - Double-Valve
Waterra ClearView disposable double valve PVC bailers are an inexpensive sampling option enabling straight-forward collection of water samples from a specific depth in a borehole.
Use for
- depth specific sampling in boreholes (top weight recommended)
- routine sampling from boreholes
Samples are collected by gently lowering the bailer into the water column and allowing water to fill from the base upwards. As the bailer is lowered deeper through the water column, water moves freely through both the top and bottom non-return ball valves. When the sample is retrieved, both valves will close, trapping the water sample collected from the lowest submerged depth in the borehole. Sample release devices are provided to ease collection of samples without spillage.
When using disposable double valve bailers for depth sampling we recommend the use of either a 150g or 250g ring weight.
See
Sampling Accessory page for cord, reels and other field essentials.
For more reliable depth specifc sampling try
Passive Samplers
For more details:
Bailers
or
Download as PDF
39mm Double Valve PVC Bailers
Capacity: 1 litre. Length: 910 mm. Weight when empty: 160 g. For sampling from 50 mm or larger diameter monitoring boreholes.
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DBD-39/10
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CVD 39mm OD dual check valve disposable bailers (per box of 10)
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DBD-39/24
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CVD 39mm OD dual check valve disposable bailers (per box of 24)
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Stainless Steel Weights with Centre Hole
Use any of our selection of Stainless Steel ring weights to help ensure that double valve bailers flush through efficiently as they sink to their required depth. Weights can be simply threaded onto any bailing cord or stainless steel wire of 4mm diameter or less. See pdf for illustration.
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EWT-150
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SS Weight 150g with Centre Hole (35mm dia, 5mm centre)
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EWT-250
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SS Weight 250g with Centre Hole (35mm dia, 5mm centre)
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EWT-500
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SS Weight 500g with Centre Hole (35mm dia, 5mm centre)
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Bailer Emptying Devices
Bailer emptying device for producing a slow laminar flow when collecting a water sample from a bailer. Tyoically used for collecting samples for VOC analyses into sample vials.
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DB/SED-1
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Slow emptying device for disposable bailers
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Bailers
Passive Samplers
