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That’s not going to be much good for alpha a 1 to 5 um would be best Dud Sent: Saturday, June 11, 2022 6:54 AM To: [email protected] Subject: Re: Alpha and Beta particle nuclear decay

Found another reel, this one is probably for prefilter of air, or for water, Whatman grade 41, 3-5/8" wide by 83m. part # 1441 6229 Best I can find out it's 20 um. Geo

Great Dudley, save a filter holder for me.George

To: geoelectronics@... Sent: Fri, 10 Jun 2022 22:07:01 -0400 (EDT) Subject: This Weekend "This weekend I plan on getting in plenty of lab time. We’ll see. Alan" Good Alan. If you set up

I’ve been searching for air sampling filters for alpha spec, radon grab sampling and CAM use. It seems the most popular and cheapest is the glass fiber type as opposed to the PTFE which is very

Let's use this thread to concentrate the air filter material, research, links and trials If you make a post that's part of another thread, try to condense the filter related items here also when

"I'll have to check out Prutchi. Has anyone bought his book?: I should have a signed copy in the library, and will find it when the stacks come upstairs to be sold on eBay. Not all but most.Geo

Same here nick. Probably have a dozen solid state sensors or so that way. 3 I are still in working Pylon WLx radon meters. Saved for a rainy day. Others came from units I scrapped ou already but saved

I'll have to check out Prutchi. Has anyone bought his book? I saw the value in these in the sensor more than anything else, which is why I kept them versus tossing on ebay for a C note or something.

Most radiation detector sensors, except Geiger Muller tubes, require a *preamplifier* to boost their weak signals to a level a Multi-Channel-Analyzer can deal with and display the familiar histograms

WLM = Working Level Meter (or Monitor). It outputs a number which is called the Working Level. A common term used in radon monitoring,We can most likely get a manual if we don't have it already.Geo

No on the unit but I have that sensor in mt solid-state sensor collection. I see the PCB has a discriminator setting, but maybe the best approach to these surplus heads is to keep the sensor and

No, all I got was the two sensor heads. They were on a pallet of gear I bought at auction from NMSU. Mostly Ludlum stuff but these were there and I thought they might be useful so i kept them...

Its an Eberline radon working level meter. Basically a CAM. The detector faces the filter and counts alphas. Do you have a picture of the face of the instrumented. Does it look like this

[email protected]> wrote:

So anybody seen these or know about them? I got two of the sample units but no controller.

what sort of pore size are we talking about ? Just curious. Only thing with pores I normally see/have is gortex rain clothes or may be the membrane from my RO water filter ? P

The milipore are just 1” disks and high cost ptfe. Mirion and Jeff will be carded filters. Let’s see what they come up with on cost. Or maybe Geo can mass produce some cards we can fit filters in.

Me too Dud but on a smaller scale.Geo

Oof, not cheap but still doable. I'd go in on them with you.