Foam detection, best instrument

[ADMIRALKEN]

I have an application where an emulsion polymer is vacuum cooled, during the vacuum stage foam is formed at the top of the vessel, I am currently using a capacitance probe to detect the foam, but fouling is an issue. I was looking at a an article on guided radar, and this seemed like a possible alternative. Has anyone ever used this technology to detect foam? Is fouling an issue?

 

[controlnovice]

I would think you'd have the same issue with any probe or guided radar gauge.

Do you need continuous or point measurement?

Is the capacitance probe you are using Teflon coated, or any other wetted material to reduce fouling?

I believe Drexelbrook also offers a level switch that offers better protection against coating. I think it's named Cote-Shield.

I have not used guided radar to detect foaming in a vessel.

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This is normally the space where people post something insightful.

 

[ADMIRALKEN]

Thanks for the Drexelbrook referral, I contacted them and while the Cote-shield isn't bullet proof, it will allow a longer time between cleanings. Current cleaning cycle is around 4 days, with the Drexelbrook switch, I hope to increase this to once per month.

I placed an order yesterday, and will follow up in few weeks to let everyone know how it works.

 

[itsmoked]

Are you trying to detect the height of the foam? Or are you trying to detect the height of the surface sans foam?

Keith Cress
Flamin Systems, Inc.-

http://www.flaminsystems.com