Solinst Model 407 Bladder Pumps and Model 408 Double Valve Pumps have a lot in common. Both are pneumatic pumps, both are excellent for providing representative groundwater samples, and both are widely used for low flow and VOC sampling. On the outside, Solinst Bladder Pumps and Double Valve Pumps look almost identical – but internally… Continue Reading »
There is much to think about before selecting a groundwater sampler for your project. Here are just a few things you probably need to consider: What you are sampling for: general chemistry, volatiles, metals, etc.; type of sample you need: low/high volume, purging or grab; sampling depth; your sampling frequency: portable or dedicated equipment; characteristics of the well…
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What do you do when your Pneumatic Pump is properly connected, yet there is no sample discharge? A simple ‘trick’ is to submerge the sample discharge line into a clear container of water. During the drive cycle you should see bubbles. An aggressive blast of bubbles can mean that there is no water available, while… Continue Reading »
