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So your humidity indicator says there’s moisture present in your air source. Now Once you’ve identified it, you need to remove it don’t you? DeVilbiss has you covered there, too. Their desiccant snake installs in-line — just like the indicator — and will remove the humidity. It also has built-in dirt and oil aerosol filters as well. And it’s compatible with HVLP and conventional systems.

Best of all, it streets for around $20 — a lot less than a full moisture removal system. For full protection, you could run two humidity indicators: one before and one after the snake to make sure it’s doing its job.

DS20 Desiccant Snake [DeVilbiss]
Street Pricing [Google Products]
Via Amazon [What’s this?]


4 Responses to A Snake You Actually Want In Your Shop

  1. PutnamEco says:

    I’ve always wondered if they are reusable. What happens when they become saturated?
    I know with all the humidity down here (Fl) they would become damp quite quickly.

  2. Craig says:

    Hmm, never used one of these. The only thing I’ve ever used is a water separator. Basically, it’s just a clear reservoir that plumbs inline, and has a nipple on the bottom to drain the water.

    Not sure how efficient it is, honestly, but I’ve never had a problem with my air tools or the like (in Louisiana).

  3. I too have used the in-line bulb water filter that Craig mentioned. I wonder if anyone has taken a cross section of this filter to see how effective its separation is. I wonder if this “snake” requires maintenance to remove any collected water.

  4. My understanding is that these are just silica gel beads, like any other desiccant air dryer, so they can be reactivated by baking to drive the water out. Instructions for the procedure should be included with the device, but they probably go along the lines of “disconnect both ends and place in 200-degree oven for several days”, which is how desiccant bags get reactivated. You want to drive the water off without getting hot enough to boil it, which would crack the beads. The difficulty here is that the hose really restricts the diffusion of air while it’s disconnected for rejuvenation, so it’ll take a long time.

    Weigh the snake when you first unpack it, then weigh it again after the color-changing tattletale says it’s full. While you’re baking it, reweigh it every few hours so you know when it’s done. Since it’ll only soak up a few ounces of water (if that!) per cycle, it’s obviously not cost effective until you get a few cycles out of it.

    The big air dryers used in telecom (for pressurized waveguides and underground cables) have two big columns of silica gel beads with heaters wrapped around ’em, and a whole pile of solenoid valves. While one column is actively drying compressed air, the other is being heated and subjected to a gentle airflow to carry the moisture out. Every few hours or days, they trade roles.

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