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Legacy Personal Blogs Geiger Mueller counter's Tube protection and preservation
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Engagement
  • Author Author: Former Member
  • Date Created: 17 Jul 2015 7:20 AM Date Created
  • Views 472 views
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  • Comments 7 comments
  • preservation
  • Mueller
  • pulses
  • geiger
  • tube
  • maximum
  • counter
  • protection
  • gm
  • mtbf
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Geiger Mueller counter's Tube protection and preservation

Former Member
Former Member
17 Jul 2015

Currently I am investigating the lifetime or MTBF of GM Tubes.

Usually a maximum of Counts is specified on GM Tubes.

For example the SBM-20 from Russia has a total pulses lifetime of: at least 2*1010

''GSTube.com''. Tubes, sockets etc. Parameters and characteristics SBM-20

However I have noticed that Tubes seem to get damaged faster than my expectation.

My Radex RD1503's SBM-20 GM tube died this year after hardly having used it.

Before some other tubes for older analog equipment also perished but with these I cannot rule out that the tubes were already used for a long time.

 

I would expect other sources of impact than normal usage as the single cause of malfunctioning of the GM Tube.

  • Earthquake, shaking or dropping?
  • Unexpected over Voltage?
  • Preservation other than non-active/off-power needed?

To be able to monitor and rule out the maximum pulses when active as single cause the total accumulated pulses should be stored.

This could be done with the normal total Dose functions on many digital GM counters.

Of course you cannot be sure when the GM Tube was bought through an online auction like Ebay, that the Tube wasn't already used before.

 

Making a new GM counter with a LND712 GM Tube which has no lifetime specified...

LND, Inc. OCEANSIDE NEW YORK - Designers and Manufacturers of Nuclear Radiation Detectors

Project progress to be continued.....

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  • Former Member
    Former Member over 7 years ago in reply to Former Member

    JIj bent zeker Tjerk die net over de pubertijd heen is image?

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  • Former Member
    Former Member over 7 years ago in reply to GJZ

    GJ, Thanks that is more than twice the total amount of counts expected for SBM20 from Russia. Wonder why they don't publish this significant spec openly though. When close to a leaking reactor like Fukushima this will be reached fast and preventive maintenance cq replacement can be anticipated on e.g. when operating in an environment of 3000cpm for more than 277 hours (5E10^10/3000/60) the tube will likely stop functioning.

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  • clem57
    clem57 over 7 years ago in reply to GJZ

    This is true for a discussion  to check as a question not for a blog for anyone that needs. Just saying.

    C

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  • GJZ
    GJZ over 7 years ago

    Fred if you post this as a question (tick the checkbox that it is a question when you write your something in your blog) then we can answer it. It will also marked it as answered when you have sufficient feedback.

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  • Former Member
    Former Member over 7 years ago

    Ben jij Fredje zoals Gert Jan dat altijd zegt?

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