This was a fantastic review. I loved how thorough it was. Thank you.

Thank you for this! I was wondering if it can make clicking sounds.

Thanks for the teardown. Few notes: - The tube is very small, so it's not particularly sensitive. It will detect stuff, but it's for the smaller changes you will need to wait quite a while. - If you need to check if it works, a common source for radioactive stuff that is legal and largely available are thorium welding rods. - Not sure how well it will perform as a beta detector.

@voltlog

2 жыл бұрын

Thanks for the info 👍

@tmmtmm

2 жыл бұрын

uranium glassware can also be a fairly inexpensive source

@voltlog

2 жыл бұрын

@@tmmtmm searched for that and I could not find any locally but I guess they come and go.

@hoggif

2 жыл бұрын

@@voltlog Thorium containing gas lamp mantles are still available too. They can make a cheap test source. It is sure that such a small tube is not very sensitive, even SBM-20 or similar common tubes take quite a while to count eg. background radiation. For seriously high radiation a smaller tube works for sure.

@voltlog

2 жыл бұрын

@@hoggif Next step is to see if it can detect stuff like uranium glassware or thorium welding rods because if it can sense those, I would feel pretty confident it can give some warning if the background radiation unexpectedly increases.

Excellent demo, I can tell by your explanation that you are a true scientist! Thank you so much for the teardown to show the Muller tube and circuitry explanation. It is probably a Chinese type tube since the unit is manufactured in China.

I'm near a large city, so my early warning is going to be a very bright light. Keeping things simple.

@voltlog

2 жыл бұрын

Dark humor 😂

The link doesnt work for me

The silkscreen says "500V" in the area of the multiplier. Maximum voltage for J705 is listed as 600V.

Can this measure DEW radiation?

I hope you wasted the money, and will never have to use the Detector

@voltlog

2 жыл бұрын

That's a smart wish, I agree.

It says +- 15% error, isn't this a bit large?

Hi Voltlog, Go to the radiology department in Constanta's municipal Hospital and check if the detector display increase values during working hours.

@londonnight937

Жыл бұрын

does it?

When I add to cart, it's $99. Add your code the price goes up to $159 then discounted... Comes out to be $6 more with your code. Not sure if you can do anything about that with whomever your contact is that gave you your code

@voltlog

2 жыл бұрын

That happens because the coupon cannot be used with other promotions and the meter is currently already discounted.

@jimmyallen1369

Жыл бұрын

the unit i have came with a hard shell carrying case.

These are interesting devices and I have one too. But they are probably not very useful for accident scenarios. Countries have proper measurement networks and weather models showing and predicting the worst releases and you should get good information from emergency services. These handheld things are great for detecting suspicious items for sure, don't want to keep a radioactive item near you for long periods of time without knowing about it. There certainly are sad stories about people carrying strongly radioactive sources on their person without knowing about it and the result can be very bad.

@voltlog

2 жыл бұрын

And here I am trying to find a radioactive source to test this meter 🙂

@superdau

2 жыл бұрын

@@voltlog I guess it wasn't you who deleted my comment, but youtube's automatic filter, because I used a word it didn't like. So I'll try a stripped down version of the comment: Keywords like "anti radiation negative ion shield" (throwing "quantum" and "energy" into the mix helps as well) on some well known ecommerce platforms should give you results. You'll find a lot of "protection" pendants and stickers. Bigclive did a video about stickers a few days ago. Videos about the pendants are on youtube as well. They are reasonably safe as a test source to check if meters are working properly. Obviously don't use them for their "intended" purpose, i.e. don't wear them or stick them to your phone.

@MichaelMantion

2 жыл бұрын

I just want something that will tell me when its safe to go to the city and scavenge for stuff with out getting radiation sickness.

@voltlog

2 жыл бұрын

@@superdau Thanks! KZread sure doesn't catch real spam with URLs which I have to manually remove but has developed some intelligence in removing non-spam comments automatically 🙂

@gcaplan1

Жыл бұрын

Any advice on one under 100 I can use to test objects like bottled water , canned food , Amazon boxes etc . Wanting to test things coming in if war breaks out

I would think they would at least try to shield the internal components against gamma, even if its a thin lead foil, but I suppose its a BOM cost consideration, and if you're near something that energetic you're probably not going to be alive long enough to care

@voltlog

2 жыл бұрын

I don't think this meter was built to be taken to strong radiation zones and ever come back 🙂

I clicked on the link to check the price, and noticed a photo of a label that states, "Mide in China" [sic]. I hope they make electronics better than they make labels!

@voltlog

2 жыл бұрын

Missed that but it's a thing that often is part of the course for the products that I review 🤣

Let me try again since my previous comment seems to have been (auto)deleted. If you need a radiation "source" check out some well known ecommerce platforms, which shall remain unnamed because it seem to trigger the spam filter, with keywords like "anti radiation negative ion shield" (throwing "quantum" and "energy" into the mix helps as well). You'll find a lot of "protection" pendants and stickers. Bigclive did a video about stickers a few days ago. Videos about the pendants are on youtube as well. They are reasonably safe as a test source to check if meters are working properly. Obviously don't use them for their "intended" purpose, i.e. don't wear them or stick them to your phone.

@voltlog

2 жыл бұрын

Ordered one of those stickers. Thanks!

Prices casually will spike now.....

Good job,

Yes it is. And the U. S. is still using them.

Tube is SBM 21 or SBM 10 something similar to this.

@voltlog

2 жыл бұрын

I don't think so, images of those look very different.

♥️👍👍👍👍👍

IMHO LiIon battery is a drawback if you need to depend on it in an emergency

Did you just delete my comment? 🙄

@acoustic61

2 жыл бұрын

If you share an external link or anything else KZread doesn't like , it will delete automatically.

@tommyallehamn9543

2 жыл бұрын

@@acoustic61 I didn't share anything

@superdau

2 жыл бұрын

Mine disappeared as well. Did you mention some of the well known ecommerce platforms? I did (but no links). I think youtube might have an automatic filter when it sees these words. That's why I explicitly am not mentioning them in this comment.

Great Price... $104.81 USD without coupon and $110.93 USD WITH the coupon... Wow...What a bargain Rip-off IMO

@voltlog

2 жыл бұрын

That happens because the coupon cannot be used with other promotions and the meter is currently already discounted.

The Geiger tube is small, want u want is a big a tube as possible I wouldn’t trust that device. It’s more of a fake Geiger counter.