Dosimeter Scintillation Counter RADEX OBSIDIAN

Hello everyone interested in measuring ionizing radiation
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Offical website QuartaRad: quartarad.com
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Thanks for watching

[@LORFCASTER]

To have a unit this nice, this promising, to then use a sealed in lithium polymer battery instead of an accessible 18650 is a DISASTER. Pretty much a deal breaker. It tells me this is a throw away product after about 5+ years. I am new to this, it is confusing as to what energy different counters can pick up. Some manufacturers do NOT list alpha or X-ray as detectable energy for example. But then reviewer comments claim that they are measurable.

[@ciprianpopa1503]

You failed to show the most important aspect of this item. and that is the spectrum of the last item you measured.

[@osmanfb1]

is there a smartphone app to connect to obsidian? Also the connection to pc is not explained anywhere on the pamphlet.

[@lucasolari3756]

I see that it is out of production. You can still find some in the web, at very high prices. I would like to know if the instrument is no longer produced because it did not work well or had defects, in which case I would avoid buying one of the few still available.

[@Dozymetria]

It's a pity that it is not developed like RadiaCode. The resolution of the gamma spectrum 12% FWHM. I still like using it, it's very sensitive

[@pcriged]

Have you also found that am-241 is off by 18kev? I've tried to assess Co-60 on multiple occasions but I only seem to be able to see the Compton edge around 800kev the actual peaks are undetectable. More distressing is I have 2 units( long story it was an exchange for a non charging unit and they never sent a return label, and so 3 months later I soldered 2 leads and a USB LIon charge controller into it and now I have 2) and they differ 15uSv/h on my co-60 test source (1.0uCi) 96uSv and 110uSv with contact reading. I do think it's ballpark correct because It does pick up CS-137 and the reading are reasonably close to my GQ-500+ Muller tube. I took the same reading and multiplied by 2 for the Co-60 (48x2=96). But still a 20% uncertainty is a problem for me and not seeing the 1300 peak at all is unsettling. I've had a total of 3 that read am241 as 78kev that's a huge over estimation. I'm really ready for a raysid but they still haven't launched.

[@boyettewhite]

I'm waiting on a radiacode 101 I dont have anything that can do spectrums yet.

[@Phoenix88.]

My obsidian shows the Am-241 peak as 84kev and Cs-137 as 757kev and 20+ FWHM

[@pcriged]

@@Phoenix88. if you have a chance please request they add channel reassignment and calibration to the android application. I've done this several times and they brushed me off. I have been in contact with RAdex both voice and email and they basically disclosed that the software is still in development. The PC software however shows channels and their respective energy while I'm sure the device can't be entirely fixed a lot could be improved on the software. I really like this devices size factor and relatively large display. It could be redeemed with a firmware update as the resolution is sufficient for basic spectro and dosimetry. I do understand that these devices loose accuracy as energy increase because narrower wavelength mean a lower chance of a collision and detection. However this is a sharp cut off and almost certainly a firmware limitation. That's my 2c.

[@Phoenix88.]

@@pcriged You can export to Becquerel Monitor and calibrate there but even then it is useless. Having almost a 25% FWHM means that most peaks won't resolve and you can forget about detecting trace Cs-137 in food or K40.

[@pcriged]

@@Phoenix88. wow is it really 25% I was lead to believe it was closer to 15%

[@helnatinty7631]

Bonjour. Le problème de cet appareil c'est la mise a jour. L'application sur le téléphone indique qu'il faut une mise jour 1,14 et il n' y a pas de manuel... L'appareil est désormais inopérant. Pas de mise a jour sur le téléphone, ni sur le Radex et pas sur le logiciel. Aucune explication de mise a jour. Si vous avez une solution merci d'avance.

[@Dozymetria]

Try updating via computer using a cable USB C

[@quantumlab9130]

I have one and it is amazing. The ability to do gamma spectroscopy in something this small and portable is awesome. Great review.

[@Dozymetria]

Yes, a great scintillation counter at a great price. greetings! :)

[@pcriged]

Does yours actually work on more than Cs and u235/ra226 because I've tried hundreds of samples across 3 units and they all only work accurately between 120 and 800kev.

[@quantumlab9130]

You are correct, unfortunately it doesn’t accurately measure anything between 120kev and around 800kev which I quite disappointing. At first I thought it was like the most amazing thing ever than as I slowly got more time with it I am beginning to see it’s limitations. Honestly I think something like the Radiascan Radiacode 101 is a much better device which can measures samples more accurately.

[@ksvp14]

​@@quantumlab9130thank you from Russia

[@chemistryscuriosities]

Freaking brilliant! I’m getting one!!!!

[@Dozymetria]

I recommend!

[@strahlenmesstechnik1567]

Hi Snow, today I get two quantum pendants from China. But sadly they both show only 0.26 uSv/h with Obsidian....do they have different mixtures? I am very disappointed with them, because I expected a much higher activity...??? With my RD1008 I get 0.80 uSv/h. I expected that this pendants have around 5.0 uSv/h....? Greetings, Markus

[@Dozymetria]

Hi, unfortunately you came across some weak scalar energy medallions, I have much stronger ones in my collection. It is difficult to buy a strong medallion, they are usually weak. The spectrum, however, always shows th-232

[@odstavec-900mm6]

Большое спасибо за этот тест!

[@Dozymetria]

Спасибо! Я еще не показал все возможности Radex Obsidian :) Связь по Bluetooth и связь с компьютером открывают множество возможностей

[@strongdark3460]

Зачем источник радиации сверху класть??? Окно измерения снизу. Неточные, заниженные показания

[@Dozymetria]

Conversely, right at the top the results are always higher, I did a test on 20 sources of radiation

[@Am6er]

детектор расположен ближе к дисплею. снизу расстояние около 1 см для того чтобы корректно измерять образцы.

[@gammaradiation4951]

Звуковой эффект взяли у дозиметра gamma scout

[@ДаниельКомьен]

It's just too bad that the device does not measure the beta flux density, the readings are greatly overstated

[@Dozymetria]

Yes, but it is still a very sensitive scintillation counter for enthusiasts of searching for ionizing radiation in everyday life

[@allRadioactive]

Pretty cool device. How does the battery life look like? I personally don't like device's with modern displays because they consume battery like crazy. Is this also the case here?

[@Dozymetria]

I also think monochrome displays are better. The working time with the active display is about 20-24 hours

[@videosuperhighway7655]

@@Dozymetria Amazing product but that sealed non standard battery means in 3-4 years it has to be tossed away.

[@boyettewhite]

What's the best pocket scintillator under $500 american dollars that can identify isotopes

[@Phoenix88.]

RadiaCode-101

[@boyettewhite]

@@Phoenix88. thanks

[@Dozymetria]

Raysid!

[@Phoenix88.]

@@Dozymetria The Raysid with taxes and shipping to the US is about double the price for the same performance(11-15%). The 8.5% for 599€ is really hard to beat though...

[@odstavec-900mm6]

Добрый день! У меня примерно в 4 утра сработал дозиметр... Если это ложное срабатывание, то странно. Телефон лежал на расстоянии, никто в такую рань не звонил... На обнаружение источника радиации тоже не похоже, поскольку длительность тревоги была 15 секунд... Что это могло быть?

[@Dozymetria]

Hello! What alarm threshold was set?

[@odstavec-900mm6]

@@Dozymetria, стандартные настройки. Первый порог срабатывания: 30 мкр/ч (0,3 мкЗв/ч). Второй: 100 мкр/ч.

[@Hasztak-ug2gi]

👌

[@gammaradiation4951]

Сцинтилятор плохо видит бета частицы,он больше на гамма лучи заточен да и корпус закрывает датчик

[@Dozymetria]

Да, это скорее гамма-сцинтиллятор. расстояние кристалла от отверстия большое (лучшие результаты, когда вы измеряете сверху рядом со словом RADEX)

[@dmitryramonov8902]

Там же шторка!

[@gammaradiation4951]

@@Dozymetria спасибо за пояснение!

[@icecorebaby]

Now I am loving mine!

[@Dozymetria]

Great choice! :)