A bailer is a device used for removing water which has entered a
boat. In the simplest case it is simply a container which can be filled manually and tipped over the side.
By extension a bailer is also a hollow
plastictube used for obtaining watersamples. Although widely used due to their ease of use and low cost, they have several disadvantages. In groundwatermonitoring applications, bailers may cause aeration of both the sample water and the water within the well casing. Bailer usage may also increase the turbidityof a sample. Large amounts of suspended solids in the sample water can prevent the check valve from operating correctly, sometimes resulting in sample loss.
Bailers are tied to a piece of rope(usually made from
nylonor polypropylene) or a piece of wire (composed of Teflonor stainless steel) and lowered into the water column.
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