FNIRSI Radiation Detector - unboxing, test, teardown 

There are solar panels on literally every roof, there will be "grid" even after an apocalypse, albeit low powered.

Ty

Pretty cool big eyed kitty.

What about detectors with mica window?

@@marcinp.8108 Mica windows are better for low energy stuff, and Alpha-the thickness of the window will affect this. For example, a typical American "pancake" tube has thinner mica than a standard end-window tube, so even though both of them have Mica windows, the "Pancake" tube will be more sensitive to Alpha). The extra thick Mica that some of the Russian "pancake" tubes use makes them barely able to detect Alpha at all(keep in mind, that even the specs on those tubes say that they are suitable for Beta and Gamma, but not Alpha)-they ARE very durable, compared to the thin-window Mica ones though).

I was wondering. I have a counter with the soviet brass GM tube and it seems really good at picking up Am241. I scratched my head wondering how alpha made it through the brass. thx

I got one of those too recently - very pleased with it (shame about the deathdapter power supply but thats easily replaced)

Yeah noticed that as well..

I'd call that a 'forgivable translation error' since the thing seems pretty decent overall

Well Spotted.

Perhaps they just over-translated Müller?

Also love how they say the dose rate maxes at both 1000 uSv/hr and 10 mSv/hr in the same sentence.

Perhaps it's possible to put a piezo beeper in parallel with the LED.

@@Ni5ei This has been done ru-vid.comOHGCy6C2i7A

place an active piezo before the led resistor and ground. its ok as an workaround.

Fnirsi 1013-d?

Thank you. I have for a long time thought about a YT channel that I swatched years ago and wanted to sub to again but coudnt remember the name. There it is 👍

i bought the one known from kreosan videos. it's absolutely awesome. i brought it to pripyat and collected some impressive data

It's all fun and games until those numbers get bigger and bigger.

​@@dennis8196 You are right!

Nope, buy and test first. Plastic limits the measurement of beta particles, but there is a good dosimeter at this price and it is not a digit generator

@@Dozymetriado you mean the dosimeter shown in this review?

​@@shahf8157This is not a digit generator.

youre rightt and u just made this thing cost 300$. yeah maybe at scale it would only add a few dollars to the price, but if youre not the cheapest your economies of scale for mfg go way down and unit costs sky rocket. i bet they thought about some of these changes and decided to pocket the difference. I think the whole tin indium oxide coated glass muller tube is a real smart way to make a consumer grade tool. as long as it uses that tech though, serious and high paying users will never take this guy seriously. ima pick one up and put it on a shelf for 40 years and hope i never need to use it... I wonder if it would be worth cutting a hole in the back and replacing it with kapgon poly amid tape to make up for the glass tubes shortcommings....

@@vevenaneathna The only change they should make is to put a cutout on the PCB under the detector tube, which would cost 0.000$ per unit, because the board already has a countour-milled non-rectangular shape. All the other mods I mentioned can easily be DIYed after buying the meter. In fact, you can cut out the PCB under the tube if you want to. Or just cut the copper clad with an exacto knife and peel it off. I can only guess the bare FR4 board probably has some level of shielding effect, but most of it comes from the two layer copper clad. I am not expert by any means in radiation detectors, why exactly you consider this type of detector tube consumer-only, not worthy for professional equipment? And how cutting out the back and coverng it with Kapton tape would help with this? BTW, I bought one of these in november. It meausures background radiation OK, the values match with the official ones. In mine, they sodered the tube into the socket, because it had a tendency to fall off during shipping, according to some early reviews on Aliexpress. I always forget to order an ionising chamber smoke detector to test it with a higher radiation level. I already tested every old clock and watch around me, seems like none of them has radium in it.

the copper is a good thing if you are measuring samples and not ambiant radiation. i would coat the pcb and add a peizo to the led to hear the clicks while prospecting in the dark caves and mines.

@@noimnotarobotcanubeleiveit7024 Yes, depending on the application, making the detector directional can be a good thing. But if you want to carry it and use it as a dosimeter, it is definitely a bad thing. I myself have been thinking about to put a piezo on the LED driver, ever since I bought the detector last november. A problem might be that the LED is driven by the microcontroller, and not by the detector tube front-end. The MCU might stretch the pulses to make the LED blinking more visible, but that is not a good idea for the piezo, it would make less clicks than what the tube detects. So it might be a bit more difficult project to add a speaker with good result. I will hopefully get into this within a few months. I will measure the pulses on the front-end with one channel of my scope, and on the LED driver with the other channel. If they are the same, putting the piezo on the LED driver will give an acceptable result, otherwise, the signal should be tapped from the front-end, with great care not to load it down.

Don't look at the flash.

Photomultiplier tubes are still common as well.

The GM tube is easily replaced with the J321 by anybody who can use a soldering iron to remove the original tube.

​@@dennisgeake2156 Also need to change the anode resistor, so that it matches the correct characteristics of the tube itself.

yep, just don't drink water with it... :))

It is good for green pee :-)

@@orange11squares Water would be OK but the recommendation by Fiesta is to avoid acidic drinks or storage of them. Not just because of U-oxide but also Lead content. Apparently the vintage glaze doesn't do well in microwaves either. Many happy housewives still use their vintage fiesta red orange pottery. However, the bright pastel colors mostly come out for special occasions. In reality any trace amount of leeched uranium oxide would pass right through your body pretty quickly because it doesn't get retained.

@@orange11squares Juice is the real danger

Who'd you source the GM tube from?

@@lciummo1 Sorry, I missed your message. I bought it from Russia about 5 years ago (2 for $20). The GM tube is model SI-22G.

No, not MEASURE directly, but you can experimenting with the vacuum cleaner: Suck air through a filter (e.g. a cotton pad) for 15 minutes and then measure the cotton pad with the Geiger counter. If radon is present, its decay products get stuck in the filter and an increased level is measured.

get an Airthings radon detector

@@kiloohm Unnecessary for one measurement. There are radon detection services for construction purposes.

As others have mentioned: You need a special instrument to measure Radon. The method with at cotton pad can work, but will not give you any value. If you have a lot of for example old, Radium watches - that can be a concerns. In such cases its advisable to store somewhere well ventilated and where people not are so often.

Radon? 😂

Nice hai 😂😂😂😂

You mean that yours came with the J321 , there is nothing on Google with JM231. if you look closely at 10:36 , you can see that there is the J321 tube installed, this is the better one. In the new Fnirsi GC-01 is the J613 installed, which works with a lower voltage and is less sensitive as the J321.

I was wondering why it is way too big... I guess you could fit a battery with 6 times the capacity inside.

I work for the automotive industry. The same electronics (MQB23) is going next year into Škoda Kodiak, VW Touran, Seat, Audi, and I probably forgot something.

TWO DAYS AGO? He just released it!! Are you cheating?

@@jesuslovesyou5819 Patreons can get access to his videos before everyone else

Plastic tooling (molds) is very expensive to machine.

To detect radiation… any setting where there might be…. There are countless places that actually require people test for it…

Well, I opened it and could see there is no CR1220 battery, it is missing. So I had to put one into it's place. The switching-off problem gone. And when I opened it anyway, I replaced a 2500 mAh battery. This doubled the operating time.

CH32F103 R8T6 401636B45

Exactly!

can you reset it somehow manually? :( I don't want mine to brick

Hi Karel, how I can contcat with You? Mine dosimeter is bricked already :(

@@greenblanko815 Yes, in menu but reflash the newest firmware and you can be calm

@@karelsvoboda1812 thank you! do you know how can I reflash it? Sorry, I have no idea :'(

@@greenblanko815 Easy. Connect it to windows PC turned off. Long press the turn on button, you should see it as new small flash drive. Put firmware binary on the flash drive, it should accept it and immediately reflash and reboot.

What unit did you buy?

It's Fiestaware red, the old one with the orange-red uranium glaze.

@@DiodeGoneWild It is quite expensive to buy here in the UK from the United States at £245 + £40 postage for a single cup from 1936-1942. I think I will give up on this purchase! Thanks anyway!🙂

flee Markets. Older relatives often have old watches in some drawer 🙂

Smoke detectors kit.

Sadly no. The hardware would support it because it has a full USB interface, but the firmware was not written to support it.

Nice to know. Looks like JP1 may be a JTAG or SWD debug connection. It's a nice product but missing the "Geiger Counter click" mode. Hard to believe they left that out.

Just use a uA meter.

It has more than 2 stages. It's a multiplier, not a doubler.

@@DiodeGoneWild Many doublers!

Do you mean the Sr90 tester from an old RBGT-62 ?

Just boost and multiply. They probably did it to use an off the shelf inductor instead of having to use a custom transformer.

Cockcroft Walton. Google.

@@bdf2718 Yeah, I know those, but I thought they only generated pulsing DC voltage and expected to see some kind of ripple on the oscilloscope but it was pretty flat

@@bdf2718 That's a bingo!

I think SBM20 is longer and it also uses a lower voltage, so it won't fit...

That's why I bought mine haha but the answer is no. It's still a cool device though. But you want an rf meter. I got the Cornet ED-88TPlus5G which measures up to 8GHz only. Devices in my home were far more of a concern than external things like towers but every case is different.

It is to keep the realtime clock ticking while switched off.

pretty common for FNIRSI products actually.

I think they hate Arial and Times Roman - looks to "American"

It's a budget device. A big battery would be the most expensive component in it.

When I get one the first thing I’ll probably do is put the biggest battery that will fit in it.

I don't see any problem with that. If it claimed it detected Yobba rays, that would be a problem.

Just to make you happy I've added some "ticks" for you. ✔✔✔✔✔✔✔✔✔✔✔✔✔✔✔✔✔✔✔✔✔✔✔✔✔😏

The reason is: The Chinese don't know that we need something like that. Many Chinese Geiger counters do not have a ticker.

the click is very annoying... once its been running for an hour straight

@@Electroneer0 every device with a ticker has a switch to turn off the ticker. but in some cases it is very helpful, more important than the display.

I got one and it doesn't have the clicking particle counter. Many are also complaining about it missing such a common feature. It has a firmware update feature so I'm hoping maybe they will add it in a firmware update.

Dildo ? coffee maker ? shower cap ? you aint given much to go on Lol!