Think I need one of these GC's....

 

Surprisingly high!

 

A little wrong usage as it makes 10 counting cycles and then presents the results.

Values measured are on the low side. One sm300 of a friend shoots up to 37 and i use exactly same counter

 

10? There will be very little change after three or four cycles. And 17/19 are not "low" readings.

I am not suggesting that they are dangerous, but plenty of radium watches test in the single digits.

 

i don't argue how to use it correctly

as shown it doesn't make sense from 2nd watch on as u have to start a new cycle for every watch .... period

i can only tell what i measured over time and a 2998 foll radium dial and hands shouls have at least 17 ....

 

Those Speedys are “hot”

 

Relax.

It’s not intended as a serious test for peer review.

Just a bit of fun for those unfamiliar with Geiger’s and Speedmasters.

A full test as you rightly point out would have a different methodology and results

 

Just for fun



Even without bezel




I hope this counts

 

Did I just get cancer watching this?

 

noooo but i have a "bright" future

 

Don't worry mate! You'll have to go some to catch up with Marie Curie. I had more than that on a CT 'knob and bollock' scan last year.

 

Was looking for a Geiger Counter the other day. Looks like this Soeks model is recommended?

 

that makes too of us i was looking at this exact model yesterday on flee bay .

 

Definitely need one to check if the lume on my 2998 dial and hands is original

 

Did they find said junk?

 

Well thank you for asking @padders. It could have been very bad..... but the good news is, I've been fortunate enough to hang on to all 3 items of "junk".... relatively unscathed.

 

What would be the values on the back of the watches?

Found the following when looking at what levels this corresponds too: So at the moment it is equal to a CT scan. But I guess a watch would be more as it is exposure over time, if you would have the watch with the crystal towards you. So what are the readings on the back of a watch? It should be much less as the alfa radiation is not good at going through things.

Event, Radiation reading, millisievert (mSv)
Single dose, fatal within weeks 10,000.00
Typical dosage recorded in those Chernobyl workers who died within a month 6,000.00
Single does which would kill half of those exposed to it within a month 5,000.00
Single dosage which would cause radiation sickness, including nausea, lower white blood cell count. Not fatal 1,000.00
Accumulated dosage estimated to cause a fatal cancer many years later in 5% of people 1,000.00
Max radiation levels recorded at Fukushima plant yesterday, per hour 400.00
Exposure of Chernobyl residents who were relocated after the blast in 1986 350.00
Recommended limit for radiation workers every five years 100.00
Lowest annual dose at which any increase in cancer is clearly evident 100.00
CT scan: heart 16.00
CT scan: abdomen & pelvis 15.00
Dose in full-body CT scan 10.00
Airline crew flying New York to Tokyo polar route, annual exposure 9.00
Natural radiation we're all exposed to, per year 2.00
CT scan: head 2.00
Spine x-ray 1.50
Radiation per hour detected at Fukushimia site, 12 March 1.02
Mammogram breast x-ray 0.40
Chest x-ray 0.10
Dental x-ray 0.01

SOURCES: WNA, REUTERS, RADIOLOGYINFO.ORG listed on:
https://www.theguardian.com/news/datablog/2011/mar/15/radiation-exposure-levels-guide#data

 

Interesting stats. Bearing in mind that alpha radiation isn't very penetrative due to the relatively large size of the particle (ionised He nucleus) vs beta (electron) and gamma (EMR), I would expect the values experienced by the wrist in wear to be orders of magnitude lower than that measured at the crystal, if indeed measurable at all. As discussed in another recent thread, alpha can be attenuated by sheets of paper, the thickness of dial, movement and caseback should be enough to stop virtually all of it. Maybe someone with a GC could check this? In addition, alpha emitters are much less dangerous if encountered by bare skin than if ingested or inhaled for a similar reason. Of course if lume dust were able to exit the case, for instance in a non hermetic dress watch with a crumbling dial, that would be a different story.

 

Note that many Geiger counters and dosimeters (including the Soeks shown in this thread and the Radex I own) don’t detect alpha radiation at all. And even those that can often are unable to distinguish between alpha, beta, or gamma particles.

Since these instruments are used to measure radiation doses and rates, not the damage caused by someone ingesting an alpha emitter, the extremely short life and penetration power of alpha particles makes them irrelevant, and therefore also irrelevant when handling a non-disassembled watch, not to mention stopped by the plastic case of the instrument before they can reach the detector tube at all.

That said, my 2914-3 Railmaster measures 28uSv/h from the front and 2uSv/h from the back.