Hard to beat for the money. I haven't calibrated the controller here yet. although subjectively and in terms of operation it works well. Do not expect high flow rates from this device. It's pretty small. Just perfect for an airbrush. Note: I bought two of these and broke them open to create an airbrush water collector/regulator/dryer for painting models. To do this, the sump/separator of the second block was modified and filled with silica balls. So far, so good.
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