Need a Geiger Counter

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Offline Andrew K Fletcher

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Need a Geiger Counter
« on: 18/01/2008 13:08:44 »
Wanted Geiger counter

Anyone know where I can get one cheap please?

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Offline Karen W.

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Need a Geiger Counter
« Reply #1 on: 18/01/2008 15:52:20 »
Hi Andrew You can build your own with a kit! See link in your PM. costs about $312.00 US which is cheap compared to between $800.00 and $1,200.00 US..

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Offline Andrew K Fletcher

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Need a Geiger Counter
« Reply #2 on: 19/01/2008 10:51:07 »
Hi Karen, far more than I intend to pay but thanks anyway :)
Science is continually evolving. Nothing is set in stone. Question everything and everyone. Always consider vested interests as a reason for miss-direction. But most of all explore and find answers that you are comfortable with

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Offline RD

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Need a Geiger Counter
« Reply #3 on: 19/01/2008 11:10:00 »
fifteen bucks ...
From here

Remember Marie Curie ...
Quote
A desperate muse she followed when she tracked the gamma glow,
Driven not by thought of gain, but an urgent need to know.
Her life was not a long one, though she served her master well.
Leukemia was her reward, along with two Nobels.

http://www.ccnr.org/ceac_B.html

Edit:
RD. hope you don't mind, but i changed your link into a clickable url. the length of the posted url made the page too wide.
Paul


« Last Edit: 19/01/2008 14:09:37 by paul.fr »

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Online Bored chemist

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Need a Geiger Counter
« Reply #4 on: 19/01/2008 17:50:31 »
I think that that ebay sale is for an ionisation detector not a geiger. It won't be sensitive enough for anything except monitoring fallout from WWIII
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Offline Bass

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Need a Geiger Counter
« Reply #5 on: 19/01/2008 19:46:35 »
Andrew
What are you hoping to do with a geiger counter?  How much sensitivity do you need?
What isotopes are you hoping to detect?
Possible to rent different types of counters for short term use.
Old enough to have a grandson
Slow enough to study rocks
Thirsty enough to find a pub

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Offline Andrew K Fletcher

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Need a Geiger Counter
« Reply #6 on: 20/01/2008 14:25:47 »
Thanks for advice

Need to measure background radiation and radiation in trees to determine how transpiration affects radiation, if indeed it does. So needs to be pretty sensitive.
Science is continually evolving. Nothing is set in stone. Question everything and everyone. Always consider vested interests as a reason for miss-direction. But most of all explore and find answers that you are comfortable with

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Offline Andrew K Fletcher

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Need a Geiger Counter
« Reply #7 on: 20/01/2008 23:30:33 »
Are these settings sensitive enough to pick up minute changes in radiation?

Radiation Measurement Set for beta and gamma ray measurement.
 Large measuring ranges: from high dose (0 .. 1000 rad / h) to very sensitive (0 .. 5 mrad / h)
 Battery operated.

You can Areas 2, 10, 100 mrad / h in the areas of 1 rad, or 10 rad / h as warning.  If the dose rate of the value you entered, an acoustic and optical alarm is triggered.
 The Dosisleistungs-ranges are as follows:
 0 .. 1000 rad / h,
 0 .. 50 rad / h,
 0 .. 5 rad / h,
 0 .. 500 mrad / h.
 0 .. 50 mrad / h or 0 .. 20000 pulses per minute,
 0 .. 5 mrad / h or 0 .. 2000 pulses per minute.
 The latter area is so sensitive that even in this practice occurring, low radiation values can be measured.
 The current operation is about 90 mA.
 Another delivery:
Science is continually evolving. Nothing is set in stone. Question everything and everyone. Always consider vested interests as a reason for miss-direction. But most of all explore and find answers that you are comfortable with

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Offline RD

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Need a Geiger Counter
« Reply #8 on: 21/01/2008 15:58:22 »
Need to measure background radiation and radiation in trees to determine how transpiration affects radiation, if indeed it does.

Some plants, (including some trees), accumulate metals, including radioactive metals,
so they would become increasingly radioactive.
http://en.wikipedia.org/wiki/Phytoremediation
http://en.wikipedia.org/wiki/Hyperaccumulators_table_%E2%80%93_3
« Last Edit: 21/01/2008 16:17:29 by RD »

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Offline Vcoolspice

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Need a Geiger Counter
« Reply #9 on: 21/01/2008 19:44:29 »
Probably a dumb question, or my brain isn't working right but whats a Gieger counter??? [?] [?]

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Offline Andrew K Fletcher

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Need a Geiger Counter
« Reply #10 on: 21/01/2008 19:55:01 »
RD as always so helpful, thanks m8.

So increasing circulation could be attributed to more radioactive isotopes being circulated, well hopefully.

Vcoolspice  Geiger counter is a tool for measuring radioctive material and radioctive energy, from xrays to radio therapy to nuclear fall out, but more importantly can measure minute changes from background radiation base levels. So a quick scan of your fruit and veg might not prove to be a healthy option, and shaking hands with a person who has just had a huge dose of radiation in hospital can prove to be somewhat disconcerting, especially if the person just happens to be holding and comforting your child or simply working in the radiology department. 
Science is continually evolving. Nothing is set in stone. Question everything and everyone. Always consider vested interests as a reason for miss-direction. But most of all explore and find answers that you are comfortable with

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Offline daveshorts

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Need a Geiger Counter
« Reply #11 on: 23/01/2008 14:39:10 »
A geiger counter won't measure radioactive material or energies, what it will tell to to a close approximation is the number of particles of ionising radiation going through your Geiger counter. Which if you just have one element involved will give you some idea of how much there is there as for a given isotope the rate of decay is proportional to the amount of stuff there.

As background levels are only 1-2 counts per second no form of detector is going to be able to measure small changes from background unless it can average for a long long time - you will need an electronic readout on your geiger counter and you will also have to take literally hours over each measurement if you want any degree of accuracy.

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Offline Vcoolspice

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Need a Geiger Counter
« Reply #12 on: 23/01/2008 16:42:44 »
 I knew that!! (Thank you for refreshing my brain though)


RD as always so helpful, thanks m8.

So increasing circulation could be attributed to more radioactive isotopes being circulated, well hopefully.

Vcoolspice  Geiger counter is a tool for measuring radioctive material and radioctive energy, from xrays to radio therapy to nuclear fall out, but more importantly can measure minute changes from background radiation base levels. So a quick scan of your fruit and veg might not prove to be a healthy option, and shaking hands with a person who has just had a huge dose of radiation in hospital can prove to be somewhat disconcerting, especially if the person just happens to be holding and comforting your child or simply working in the radiology department. 

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Offline iko

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Need a Geiger Counter
« Reply #13 on: 24/01/2008 21:44:36 »
Hi Andrew,

99euros for this DIY geiger kit!


I bought and put together the previous model
years ago: it's rather sensitive in terms of
radiation 'noise' or environmental bkgrnd...

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Offline Andrew K Fletcher

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Need a Geiger Counter
« Reply #14 on: 28/01/2008 10:48:03 »
Thanks IKO

Got my eye on  a nice counter at the moment, seen some pretty decent ones now and learning more about what they can and can't do so I get the right one for the job, really need some way to plot the data on a graph also so it can be compared. Don't fancy building one though but thanks anyway.
Science is continually evolving. Nothing is set in stone. Question everything and everyone. Always consider vested interests as a reason for miss-direction. But most of all explore and find answers that you are comfortable with