This thing is amazing. Not only can it detect radiation but it can also detect when people talk about radioactive materials! 4:50

They detect radiation? I've been trying to iron my clothes with one of these.

@ichaukan

5 жыл бұрын

Did it work?

@AndreasAndu651

4 жыл бұрын

How are u gonna get money *facepalm*

@ThatAnimalChannel

3 жыл бұрын

Lmaaaooo❤

@EpicGamer-do4zd

3 жыл бұрын

*everybody gangsta until it starts clicking*

@pauldufresne4650

2 жыл бұрын

What a complete waste

500 rumplestiltskin per hour..wow

@leathercheerio1

3 жыл бұрын

@Nimbus Nimbus lmao

@Crilbus_BowlingFag

3 жыл бұрын

@@leathercheerio1 lmao

as a prank you could take a test sample of cobalt and tape it to the inside of the meter and then convince somebody that their house is full of radioactive material

@KarbineKyle

5 жыл бұрын

You would need millicuries to curies (of specific activity) of Cobalt-60 (or other isotope that emits high energy gamma rays) to get the needle to rise on a survey meter.

@geonerd

5 жыл бұрын

Not with one of these. The more sensitive meters work great for scaring people. They hear a bunch of clicks and think they are as good as dead!

@videosuperhighway7655

5 жыл бұрын

Billy Payne lol a few Curies should do the job. Everyone will have a good time.

@0error.389

5 жыл бұрын

You can turn the knob with the zero thing and then not irradiate yourself. and it would be stupid to put a cobalt source that can make the dial move on that anywhere near you.

@chadjones99

3 жыл бұрын

@@0error.389 there is no source in this meter

These are not Geiger counters. These are radiological survey meters. Apart from the difference in construction, these operate in the "ionization region" (lower voltage), not the "Geiger region" (higher voltage). Survey meters are for _extremely high_ levels of ionizing radiation only. No NRC exempt check source is going to make the needle rise on one of these meters. It's _possible_ to make the needle rise slightly on the lowest scale (X0.1), with multiple gamma only NRC exempt check sources with the highest specific activity legally available at zero distance. However, the most common problem with these are a faulty circuit. It may _say_ the *circuit check* and *battery* are "OK", but this is often not the case. These need to be repaired and calibrated, regardless if they've never been used or not. What will happen is that the needle will rise slightly, and then slowly fall back down to zero. It will continue to fluctuate like this. This is a very common symptom of a faulty survey meter. This is very common for old Civil Defense radiological survey meters. Use a Geiger counter (CD V-700) only. Or, use a Geiger counter with the survey meter, if you are working with or suspect extremely high levels of ionizing radiation.

Roentgen (or Röntgen) is pronounced "RENT-gen", with a slight roll of the tongue on the "R". This is a minor thing, but a lot of people pronounce it wrong. It's German, named after Wilhelm Conrad Röntgen, the discoverer of X-radiation (and 1st person to win the Nobel Prize). I've even heard some say "RO-tuh-jen", "WRENCH-en", and "RO-ent-gen". You can also use the "rad" or "rem" (Roentgen equivalent man). They're basically the same in numeric value, but different in terms of how dose or exposure are measured. The *rad* is _absorbed_ _dose,_ *rem* is _equivalent_ _dose,_ and the *R* is _exposure._

Thanks, was here for research. Just what I needed. Greetings from a grateful writer.

This is the most useful of the CD units for what was intended for, to find the safest place to shelter after an attack. The wide range is the key. The 700 Geiger counter is too sensitive for that at 50 mrem, but 500 mrem is fairly safe and might be as good as you could find. 500 r should have you running away. So it covers a realistic range. That's why it replaced most of the others.

@SwingingChoke

6 ай бұрын

Yes 🙌

@SwingingChoke

6 ай бұрын

The Russian military during Chernobyl only has giger counters when they for they arrive that maxed out at 3r/hr they needed these

"Go find a hospital" ! classic

@TerrorLTZ

3 жыл бұрын

atleast you can be... the first mush of meat to be hospitalized... or piece of Human Sized radioactive Jerky (well there was a guy who... was hospitalized after being exposed to high radiation) depends on what comes first.

If that thing reads you really shouldn’t be there

My in-laws gave me one for Christmas today, it’s pretty awesome. A small piece of history

Good thing to have around to see what happens when you turn on your microwave, or the food coming out of the microwave. Your Dad has the right ideas.

I have some 'normal' gamma radiation meters that read in uSv/hr, which are good for monitoring normal background radiation levels, the radioactivity of granite benchtops, uranium glass etc., but would be useless in case of fallout (where readings might be a million times higher eg. 10 R/hr which is 1 Sv/hr). So, although I will probably never get a reading from the CDV-715 (hopefully), I recently bought one 'just in case'. One thing to note is that if you do buy one, try to get one marked 'CDV-715 R' as these units tended to drift out of calibration, so a retrofit was supposed to be done to all units (back in the 1980s?). The 'R' units should hold calibration better. BTW, I had to pay about $100 for mine (it came with most of the rest of the 777 'kit' these units originally came in - so I also got a carry strap, a couple of 50R dosimeter 'pens' and the dosimeter charger unit, and manuals), plus it cost that much again to have it sent to Australia from Texas! But it hasn't been calibrated since 1995, so any readings would likely be pretty inaccurate (but, in a situation where you were sheltering from fallout or evacuating cross-country, any reading is useful, as 'lower is better' would be the general rule, and it would let you strive to achieve ALARA (as low as reasonably achievable). As a rough 'rule of thumb' a cumulative exposure of more than about 100R over days or weeks will give most people some radiation sickness (and long-term increased cancer risk), and a cumulative dose of over 200R has about 50% chance of killing you. So you'd want to be getting readings in the x0.1 range and not the x100 range even in a nuclear disaster situation. Unfortunately, I'd have to pay another A$400 to get the meter recalibrated locally at Sydney's nuclear research reactor, so I'll probably not bother ever getting it recalibrated.

Just found this video, I own this unit. They are in demand in 2023 for a solid working calibrated unit for about $125 to 150 range in Canada. Got mine for 50 bucks a few years back. While people might not admit it folks are obviously worried about the crap going down between Russia and NATO in Ukraine so the price has been jacked up. I ended up blowing the dust off mine and taking another look. Thanks for the vid.

I put mine in my microwave to see if it work work and it popped and it no longer works

Thanks for this vid I got one of these for display and a prop. Thank you for the info on it.

That was nice thankyou for explaining it. I have one just like it.

And here i am sitting in the basement at work reading .5r/hr fairly steady

In Spain these kind of meters are measuring 0.1-0.3 in many places.

I am curious to see if it will read anything at a closed military facility that may have had DU rounds in its ammo dump. Guess we'll find out!

I got mine from Coleman's Military Surplus. It was listed as non tested or non working. The price was $19.99. I put a battery in and it seems to work fine. So I am ready for the Nuclear Apocalypse, haha. Goodbye cruel world.

My guy Rihanna has a small amount of rust around the radiation chamber but doesn’t Break penetrate anywhere, is it still good?

If dhis detect water in dhe waul whao distance. What wonde use tks foot dhis say .

This is called a Radiological survey meter. Note how Fukushima is not mentioned but Chernobyl is?

This video aged well.

My meter started bouncing whenever I put it on the zero setting it’s been doing this now for a while do you have any idea what could be causing it ?

"unless you're foreseeing some kind of major nuclear catastrophe" Yeah

Just picked one of these up at a fleamarket, but I think mine is bad, or at least I hope it is because its reading over 250 r/hrs. 🥺

Make sure it is zeroed before the bombs go off don't do it after you are at lethal dose lol that thing is in great shape

Chernobyl had around 1000 on one roof, 2000 on another and 10-12 000 on the third one.

Case looks well sealed. Where is the sensor?

nice vid! thank you-

Where to buy these or other CD geiger counters to europe ? Anything that isnt ebay please haha

Guess what? You now may need it more as than a shelf display!

Have you utilized it today? Also can it be used to detect DEW?

It's not a Geiger counter! it's a survey meter!

do its other versions can detect a,b, g, and x rays like the CDV-700/720?

@minerzone63

10 жыл бұрын

The cdv-700 can detect Gamma,X-Ray, and Beta normally. But there is a probe for it so it can detect alpha

Hold up just after the explosion it was 15.000 röntgen right?

Yes, there are isotopes that can be inhaled and ingested. Some isotopes have a radically longer half-life than other isotopes. Alpha radiation which can be stopped by a sheet of paper, is considered ionizing radiation. As such it can lodge in the lungs and distort DNA in lung cells, causing mutations and with it, cancer. Note that the common civil defense Geiger counters cannot measure alpha. Alpha particles cannot penetrate the Geiger tube shell, even if it is exposed. You must use a "scintillation probe" for alpha. It looks like a small angled pancake mounted on the end of a wand. This probe has a flat plate with scintillation crystals and a very sensitive light detector behind it. High gain electronics used to make it work are very different from a simple Geiger counter. You generally buy the entire counter along with the probe (and these units are usually fairly expensive.)

@Anti-proton

8 жыл бұрын

+tedtw Sort of correct. The "pancake" tubes are not scintillation probes, they are Geiger tubes with a thin membrane allowing alpha into them. There are alpha scintillators, but they work using a much different technique than a Geiger counter.

There are numerous technical problems with this video. As a video about a conversation piece, it shows you the meter jsut fine. If you are considering buying one for its intended purpose, please read the information avalaible at www.radmeters4u.com

I need one for my next Halloween costume

what is a safe r/h exposure for human life I'm new to this stuff I know the cdv 700 is more precise Geiger counter and that's what I should use but what is the range between safe and sick

@FailedSquare

7 жыл бұрын

I wouldn't want to go over 50r. It's going to depend on how long you're exposed and the body parts exposed the radiation. 75r (whole body) causes vomiting in 10% of those exposed. 100 would cause a loss of hair for about 2 weeks. And 200 is the absolute max "safe" dose with out immediate medical problems. I think a typical x-ray has a rate of about 30r/h but it's only running for a second at most. I remember reading this stuff from an old chart somewhere. Basically the higher the r/h the more you need to gtfo of that area. Anything intense enough to show up on a 717 is not good at all. 400r spread over the course of a year is probably not going to kill you (at least not directly) but 400r in an hour has a pretty good chance of ruining your day

@videosuperhighway7655

5 жыл бұрын

Thri11Gamer115 none anything r/h means bad bad bad.

I want the test source for the 715. It’s in a lead box with a lock on a door

I have a 717 that looks much like that, but don't know what size battery goes into it. I lost instructions, and it doesn't say on unit any where.

@user-xr5mx5wv8e

4 жыл бұрын

Its probably a D cell, but you can look it up on the wikipedia page.

@user-xr5mx5wv8e

4 жыл бұрын

Ok yeah, it uses a 1.5 volt battery so you'll have to check what fits. Its probably a D cell

Good video. I've always considered these as how much you're screwed meter.

Are these any good for detecting the radiation we are getting from Fukushima ?

@ForbiddTV

9 жыл бұрын

Not even possible unless you are in Japan. The model CD-V715 detects gamma radiation. Gamma radiation travels in a straight line and is blocked by mass so it can't come around the earth.

@Anti-proton

8 жыл бұрын

+ForbiddTV Even when I was in Japan I found it difficult to detect anything with a gamma spectrometer, south of Tokyo. North of Tokyo was a different story lol

@ForbiddTV

8 жыл бұрын

antiprotons What most fail to realize is you wouldn't be able to read ANY gamma from Fukushima even just a couple miles from the plant. Any mountain between you and the source would block the gamma from reaching the probe/ion chamber. What you were probably detecting north of Tokyo would probably be an abundance of natural radioactive minerals in the soil or more cosmic rays if you were increasing your altitude as you traveled.

@Anti-proton

8 жыл бұрын

+ForbiddTV Correct, when I flew over Fukushima at 36,000 feet I got nothing on the spectrometer at 661.66 keV. My background was mostly XRF, pileup, and 511keV from cosmic background. What I was detecting was not NORM, but Cs137 and Cs134. I was using a 512 channel CsI(Tl) gamma spectrometer. I also tested samples using a larger NaI(Tl) and a 1024 channel MCA. I calibrated using Cs137 and Eu152, first. The only readings I got of byproduct materiel from below Tokyo came from under a tree in Yamaguchi prefecture. The levels were low (don't recall, but something like a few Bq/kg and just within my detection limits). I used a 95% two tailed confidence, of course. A good activity analysis was not possible as I was using a portable unit and not a calibrated lab unit with assayed source. Without a Cs134 peak for reference, I cannot say the source was Fukushima.

That’s a radiological survey meter not a Geiger counter very big difference

How do you tell which radiation your detector reads?

@jefrywashere8755

5 жыл бұрын

It can tell the radiation power...not the type of the radiation... (Sorry for my bad english)

@AshGreen359

Жыл бұрын

Gamma only

What about radon ?

I actually have this particular one and you say they cost about twenty bucks?

@Abigail-md1fv

Жыл бұрын

I found one on Etsy for $45.00 but still that isn’t that bad especially in 2023 lol

OH SHIT OH SHIT AM GONNA GET IT IN CHIRSTMAS YEESSS WOOHO!!!

Thanx informative

if you take the back cover off, the ion chamber should read beta also.most commercial nuclear power plants have updated window on those that slides back and forth

@johns1625

2 жыл бұрын

The ion chamber it's self is made of zinc plated steel and stops beta particles.

@chadjones99

2 жыл бұрын

@@johns1625 im just telling what I see at work, they slide the bottom cover open to read beta and closed to read gamma

What is the unit he is saying? Roentgen?

@DagazGriff

7 жыл бұрын

R/h, so you're right.

I have one of these. It's mint.

I just got one of these. The CDV-715. ($50, thanks Obama) I see companies that say I need to pay them to have this calibrated. It seems like you just calibrated yours in two seconds. Do you know if they do anything different? Can my meter be way off?

@passedhighschoolphysics6010

7 жыл бұрын

There are two types of calibrations. The knob he was using compensates for battery use. The other type of calibration ensures what the meter is reading is accurate. This type of calibration required a radioactive source with a known decay rate. I think this type of calibration runs about $100. Some of these radiation meters came with a radioactive source mounted on the side of the detector. This source was used to verify the accuracy of the meter. Someone might correct me but I think these things lose their calibration over time even if they are never used. It's just the nature of the instrument.

@AndrewAttard78

7 жыл бұрын

Passed High School Physics Thanks for the info. The knob zeroes the unit for me and circuit checker moves the needle to the right spot. The unit works. If I ever have to use in an emergency I'll round up. Lol.

@passedhighschoolphysics6010

7 жыл бұрын

Andrew Attard I did a bit more research on this thing. It's not a Geiger counter at all. A Geiger counter would have a tube on a cord similar to a microphone. This thing is a Survey Meter. It's made to measure areas which are highly radioactive. As in a nuclear bomb was detonated just down the block. A Geiger counter in this situation would become overloaded and would not work at all. In fact a Geiger counter's circuits would become so overloaded they would incorrectly measure no radiation at all. It appears this unit can be calibrated to different gamma ray sources such as U233 or PLU239. While they both release gamma radiation the energy levels are slightly different and thus the meter has to be calibrated differently. It's interesting stuff.

@AndrewAttard78

7 жыл бұрын

Passed High School Physics Yeah, I got mine to measure exposure in my improvised basement bunker during the apocalypse. The kit has a couple other pieces too. Cool stuff.

@AndrewAttard78

7 жыл бұрын

Passed High School Physics the kit had a second meter. I think it's cdv-717. That one detects gamma radiation outside the bunker. There are also these cigar tubes that measure your total exposure. The whole idea is to not die from radiation poisoning.

Does anyone where to buy this item?

@HighFidelityFox

7 жыл бұрын

Kyaw Thiha ebay

@evansix

6 жыл бұрын

sportsmansguide.com

This meter only works where you would not want to be, where you die..it's only use would be for a suicide mission after a bad accident, so the only people who would keep this in service would be the nuclear industry, the military and maybe a few fire departments ,although they have new modern versions with colour screens, software and preloaded information that displays all kinds of warnings and compositional information (that cost $50,000 to $200,000 each maybe more ) so these be modern ones are out of reach for most individuals, the old ones are more a curiosity and not at all useful ,anything that makes a cheap off the shelf general retail radiation counter or analyser scream or alarm is usually run away fast to "game over" for a human so this is a heavy paperweight or a collectable at best

Wait does it make any sound?

@flare6969

4 жыл бұрын

It’s does. But if you hear sound coming from a survey meter you’re in very hot water

@vanamonde2

4 жыл бұрын

No. There is no audio output on the CD V-715. No point in having an audio output on a detector like this.

You might be able to connect it up to a stereo amplifier.

@donkeyrockerstudios

Жыл бұрын

how ?

Would it be able to detect uranium

@panzerwolf494

8 жыл бұрын

+Wolf Shadowhill No, it won't. Non-enriched uranium doesn't release enough gamma to surpass background radiation and these survey meters won't read low enough to register. You're better off getting a geiger. Also as for the talk about chernobyl's roof, the radiation read well above 500. The reactor fuel and graphite was reading 40,000 r/h, hence why the firefighters got sick so bad (radiated enough that they irradiated the medical staff, the coroners, and were buried in sealed lead coffins) and why teams were only allowed a minute to work at a time. 400-500 r is a lethal dose, but the radiation dose must accumulate. In a 500 r/h area you would have to stay there for an hour to receive a 500 r dose. In a 1,000 r/h area you have 30 minutes before you get a 500 r dose.

@WolfShadowhill

8 жыл бұрын

ok thanks

Wish they were $20 now.

So what your saying is I wasted my money… dang 8 years later this is going for close to $100 in some cases.

This will only detect gamma radiation

Sub # 900 here! Very informative video. Well done.

@Jesus_Christ_for_ps2

2 жыл бұрын

You just got a new sub bro

More ignorance, this is not a geiger counter. It's called a radiological survey meter.

@fongmaho

9 жыл бұрын

ForbiddTV It's clearly shown in the video that this unit uses a ionization chamber, yet the term "Geiger counter" is often (wrongly) used as synonym for all types of radiation detector...

@annelieseocallaghan801

7 жыл бұрын

I've seen people call dosimeter pens , Geiger counters.

@ForbiddTV

7 жыл бұрын

Anneliese o'callaghan Everything the TV/movies/media has ever shown about the equipment has been a myth. That's what I fight every day.

@annelieseocallaghan801

7 жыл бұрын

We must all carry on fighting against ignorance, especially in the area of physics, where there is oh so much ignorance.

@0zfer

7 жыл бұрын

@Anneliese o'callaghan You mean chemistry?

Kinda like a speedomidor on a car

where do you get these?

@StingyTrigger

3 жыл бұрын

Gun shows

@murphdog9506

3 жыл бұрын

Ebay

@Abigail-md1fv

Жыл бұрын

Etsy 😊

That meter is busted, the meter should not even be moving at all even on the low range. The problem with those meters is the capacitors go bad and the meters leak voltage etc.. But they are neat for paperweights, collection,joking around they are cool.

Dude it was only reading 3.6 roentgen. Not great, but not terrible 😂

This is not a true Geiger counter as it does not contain the Geiger-Muller tube.

Test your dust!

I really don't believe that's a Geiger counter looks like a survey meter to me I don't think anything thing that you could legally own would make that needle move

This is an ion tube...

Maybe bannanas

This is not a Geiger meter that is clearly a survey meter

It's REM per hour

@wealthelife

3 жыл бұрын

R/hr is actually roentgen per hour in this case, as you are measuring raw counts at the meter and not human dose rates. But for external gamma radiation doses at the 0.8 - 1.2 MEV energy levels these meters cover, rem, rad and roentgen are considered practically equal. Roentgen equivalent man, the "rem", is now defined as the dosage in rads that will cause the same amount of biological injury as one rad of X rays or gamma rays. So R/hr is effectively rem/hr, but the meter is actually reading roentgen/hr.

myn just went to 1 at range xo.1 0.0

3.6 Not good, not terrible

3:21 😑😐😶 😂

it picks up gamma or XRAY as they are the same

This type of sensor is almost useless if your concern is a nuclear blast or accident. Here is why - the radiation rapidly decays once the 'burst' is over. It is not that average dose rate that will matter - check out the book by Glasstone and Dolan. The short term burst may be in megarads per second but the time integrated dose is what injures or kills you. Get a device that handles bursts like that and you can protect your family. Most Geigers/Ion Chambers etc,, silicon devices and scintillators will saturate - not letting you know what is happening. The new ones with lot of electronics will fail anyway because electronics are sensitive to bursts. the first hour after the event and the first minute offers you the best chance of surviving. This is because the right device will help you get out of dodge and protect your family.

You would do better having one that scale was MREM per hour

@chadjones99

3 жыл бұрын

0.1 on a rem only meter is 100 mr or 100 millarem you have a high range meter. It would be the same if your speedometer in your car only showed 50 and 100 miles per hour and you had to gauge where 10 miles an hour was when a regular speedometer shows increments of 2 miles an hour usually it's easy to tell we're 10 miles an hour starts

@chadjones99

3 жыл бұрын

@cody austin rem = roentgen, I work in the nuclear industry and that is what we use , with the same type of meters

@chadjones99

3 жыл бұрын

@cody austin Roentgen is not really used anymore in this country, rem is and being rem is a large scale its is broke down to milrem. Rad is same as rem( kind of but used on larger scale ) and close to Roentgen. But like I said we don't use that anymore. And although I wasn't trying to argue with you I was trying to explain your meter is too big for any useful use unless there is a complete nuclear disaster

@chadjones99

3 жыл бұрын

Sieverts is not used in this country by anyone in my industry, we just don't use it but once again our government likes to use old technology. I'm pretty sure they use that overseas but not here. Not unlike the metric system that we never fully embraced

@chadjones99

3 жыл бұрын

@cody austin I have to take a picture when I get to work they don't look unlike what you have there just not yellow that's old Department of Defense stuff you have

If you read 500 R/hr you're fucked..! You'll have a few hours to live at best.

I’m from the future and we are on the verge of nuclear war so unfortunately those could be relevant again.

Like clicking

Damn, I just bought one of those in a kit with a couple of dosimeters and a charger for about $125. I wish I hadn't :-(

I see these are cool to have. But should get a modern more sensitive model with a sniffer. You tube is my college. Lol

They are Useless and OUT of calibration anyways!........the Cheapest Counter I would consider, would cost $150-200 range....that's for entry level Pocket stuff!

This is NOT a Geiger counter.

In 7 minutes you managed to make so many mistakes it's baffling. You should probably take this video down to not spread misinformation.

Will it read 5G Radiation

@Luke-wx5df

4 жыл бұрын

Rene Perez NO, THEY ARE DIFFERENT THING. EMF RADIATION IS NOT IONIZING RADIATION. Even if you gave a EMF detection unit, jeez ofc its going to go off, ur phone, ur microwave.