[ RadSafe ] Intrinsically safe survey meter

[Geo>K0FF]

Brent, the Ludlum 2929 is a really good unit. I keep one on the main test 
bench hooked up to a 43-10-1 sample counter. This is the standard of the 
industry everywhere except some portions of Austria.

George Dowell

New London Nucleonics Lab


----- Original Message ----- 
From: "Brent Rogers" <brent.rogers at optusnet.com.au>
To: "'Geo>K0FF'" <GEOelectronics at netscape.com>; "'Radsafe at Radlab.Nl'" 
<radsafe at radlab.nl>
Sent: Thursday, December 25, 2008 10:59 PM
Subject: RE: [ RadSafe ] Intrinsically safe survey meter


> I've had good luck with the Ludlum 2929 (does an excellent job at 
> reporting
> concurrent alpha and beta counts) as well, but can't speak for whether or
> not it is intrinsically safe.  I would presume so, but haven't seen any
> documentation making the claim.  It isn't portable, i.e. needs to be 
> plugged
> in, so that may or may not disqualify it.
>
> Regards and Happy Holidays
> Brent Rogers
> Sydney Australia
>
> -----Original Message-----
> From: radsafe-bounces at radlab.nl [mailto:radsafe-bounces at radlab.nl] On 
> Behalf
> Of Geo>K0FF
> Sent: Wednesday, 24 December 2008 10:32 AM
> To: Radsafe at Radlab.Nl
> Subject: [ RadSafe ] Intrinsically safe survey meter
>
> Q: "Date: Mon, 22 Dec 2008 07:43:07 -0500
> From: "Carl Speer" <cspeer at secradcon.com>
> Subject: [ RadSafe ] Intrinsically safe survey meter
> To: <radsafe at radlab.nl>
> Message-ID: <000301c96432$d7a07790$b4accfd8 at secradcon.com>
> Content-Type: text/plain; charset="us-ascii"
>
> I have a need for an intrinsically safe (explosion proof) alpha survey
> meter. Ideally I need a dual alpha/beta survey instrument. I have found
> where Ludlum now makes the Model 3-IS with a 44-9 alpha/beta/gamma probe 
> but
> with my application I need to distinguish between alpha and beta
> contamination.
>
> Does anybody here have any first hand experience with an intrinsically 
> safe
> survey meter? Does anyone have suggestions for a vendor or model? Also, 
> any
> specific operation considerations would be appreciated.
>
> Thanks,
>
> Carl Speer
>
> Safety and Ecology Group
>
> Oak Ridge, TN"
>
> A: Carl, I have the Tracerco T201 and T202. The T 201 is just a pancake
> detector. The T202 is Gamma/X-Ray only.
>
> The pancake will detect alpha and beta fine, and I suppose a filter could 
> be
> used to discriminate, but nothing like a  Ludlum 2224, 2360 or 2929 all of
> which I also own ( none for sale, mine personally).
>
> Do you have to log the individual alpha and beta counts?  It's pretty easy
> to use a regular pancake like the Ludlum 44-9, up close to the surface for
> contamination monitoring, if a hot spot is noticed, pull it back 2 inches.
> Alphas won't travel that far in air but betas can ( 10 feet per MeV more 
> or
> less). To read the Gamma/X-Ray component, flip it over, read through the
> back of the 44-9. It takes longer to say it than it does to do it.
>
> George Dowell
> New London Nucleonics Lab
> 573-221-3418
>
>
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