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A well and truly honest review. I just received my Radiacode 103G a few days ago. I was rather impressed when it picked up on a discarded smoke detector at work in our e-waste bins. Let alone alarm on a patient at our cancer center. Also picked up on Fluorine-18 used with PET scans. Just today I received in the mail a ceramic plate I bought from United Nuclear. Forgot what I had ordered. But my Radiacode started going nuts next to the package before I opened it. Spicy little dinner plate, put out and IF I'm reading my Ludlum's meter right about 10k CPM. Capable little device. Replaces my Terra-P for a daily carry unit. Bought mine after Radioactive Drew showed off his Radiacode 103G. I like it. i agree with your 4.5 star rating.

I just upgraded to the Rad Pro firmware. However, this on my Bosean FS-5000. Other than the TFT display being more unique and vibrant using the stock firmware, which I totally agree with you on, I really like the Rad Pro firmware, especially on the Bosean FS-5000! It has so many more features, and since I use CPM and CPS (mostly), it has many more options available for CPM and CPS, including sieverts and rem! It doesn't have HV adjustment options, though. The 4-pin header I used with the ST-Link V2 programmer is now soldered to the PCB, so I won't need to remove it, when new updates become available. The battery life is also still very good, too. I'm glad I found and subscribed to your channel! Your videos are very well-done and informative! Thank you so much and cheers from the USA!

Great review. I think they upgraded the case design since then. The new case has a removeable rubber cover protecting the PIN.

Congrats Max! 😎

I have been thinking at the 5:47 (something around this time) about the engraver you talked about do you think you will find different results if you used focus lens?

IR illumination isn't really difficult since any incandescent or halogen lamp will provide a lot of IR, and it can be used with gel filters. One saturated red gel plus one dark blue or green gel will cut out almost all visible light while being fully transparent at 850nm.

All your topics are interesting. Thank you.

...Maybe the 80bucks goes to the black absorber :) Also it is hard to find material that works wideband and appears to be abosrbent . Vanta Black is nice but they don't give out free sample readily

I upgraded the crappy POS tube I had, to a J321, installed the RadPro software and upgraded the 1100mah battery to a 3500mah battery. *update* We are over 40hrs run time and counting now. Ps: the clips you need to solder on for the J321 tube are heavy duty fuse clips.

Thank you for your hard work your content is really great keep up

The USA's background radiation spike you saw was probably from the Fuishimas blast blowing over and sticking to the trees, dirt, and buildings here. LOL A lot of China's coal dirt blows here too and our kids are dumb enough to think we make it all.

I bought one just now. Thanks

Well, you know what they say, put shit in a pretty package and people will buy it. LOL HA HA

Great technical review with high production value! Does the device screen on the KC761-B always display channel numbers instead of energy, or is that user selectable? That detracts from its usability in the field.

The cheapest detector i have is a "Hakarucchi ipt'a" which i got for less than 30$ shipped in 2014. The "RAT-1W" is the same probably with other look. These where sold after fukushima. They are no longer available, take 3 AAA batteries and have a single button and simple display. They can display average radiation of the last 1-6min (0.1ySv/h - 19.9ySv/h) and lifetime dosage. Mine remembers the lifetime value without batteries since many years. Also shows around 0.1 for background and 2.3 for a old camera lense with thorium, next to it after a few minutes. Considering the inflation since 2014 and that this included shipping, thats quite cheap. Mine has a blue label with a picture of playing children and butterflies on it. I think these where made in japan without any intend to make a profit but rather help people after fukushima. Iam not 100% sure what detector it uses but i think its some semiconductor detector.

whats the limit on these newer models? Is it still 11W and they kick off?. Got some very old ones, from like 2016 or 2017 purchased from Tommy at LPS... the pocket and Tornado... was around 35 each back then.. they are still kicking here in 2024 and working fine, even though I been hammering them with intense lazing, way above reason for such a small heasink with a limited sensor & coating,. Got numerous laser power meters of higher standard, but these dllrt cheap pocket meters is one of my favorites... its så convenient to use and it holds its batterycharge well over time ... accuracy is suppresinly decent for something this crude.. my unit read around +4% high, though do recall it would influence the reading if battery gets to low but all that can likely been fixed, as my unit are like 7 to 8 years old and no battery indicator.. example of the max, and where it chokes. th-cam.com/video/GCqrcVHhLrs/w-d-xo.html and green th-cam.com/video/7KJAXeTLYbU/w-d-xo.html the other model Tornado LPM, but it was only on market fora very brief moment back in 2016/2017 th-cam.com/video/Dr4xKMC2sLc/w-d-xo.html

Thanks for making this video, you helped me choose the right cheap Geiger counter to buy. Got my Bosean clicking away right next to me at the moment.

So does it send the spectroscopy data on the map to russians that manufactured it? :D

Your sarcasm is so sarcastic. I'm so glad that I discovered your channel. Your like Mr. Wizard on steroids.

Great video. I've previously tested a couple of tubes for UV sensitivity. At 395v, a J304 glass tube had no UV sensitivity. Same for an SBT-11A tube with a clear mica window. I didn't turn up the voltage, as that where I normally keep it set.

There is an issue if you could assist. It takes to check the calibration of my latest particle counter gas analyser for formaldehyde and TVOC it is pure diffusion type. It means that no gas under pressure can be led from the bottle on the calibration/pump cap to sensors. So how to determine ppm or mg/m3 concentration over the opened bottle of samples?

Mine glitched the fuck out and says I'm experiencing a solid 57,000~or 64,000 CPM. unless I'm dead or something this was consistent in two different locations. It's worse than a piece of shit.

Nice! There is a great read on Harvard University page - "The Bolometer and Radiant Energy" by prof Langley, 1881. With a metal strip covered in soot, connected as part of a Wheatstone bridge to a sensitive amplifier you should have much better time response of the sensor and low power accuracy.

With the 2 lasers you are holding them under an angle of 45°. This will increase the surface by approx. factor 2. With two lasers it is a factor 4. You could test this with some other lasers.

1 + 1 = 4... hello, Terrance Howard? Prepare to have your mind blown.

I would love to see your version of a power meter! Especially if you make the details available and I can build my own.

AI generated content should be marked somehow

Please do design your own!

16:30 Don’t stare into laser with remaining eye

Definitely interested in the LPM design.

Your videos are taking on a very "Look Around You" quality. Nice job, thanks

3:42 The laser is in the claimed specs on his label: 650+-10nm. It means, it can be e.g 660,659,658 or 640,641,642 etc...

yes definitely a DIY version of this would be really interesting and also perhaps a way of easily calibrating it with a resistor perhaps using your own one as a baseline for that resistor calibration. Also I see you used a black permanent marker is there something else that might be better perhaps such or some form of carbon as the black coating. Whether you're black marker pen would just get evaporated off the surface with a more focused laser. Very interesting keep up the good work

YES

Just stumbled across your channel, absolutely love it! Subscribed! Can you also a video about radiation in homes, emf and your view on the influence on your health. And if this actually matter or not

Nice video! Learned something, will try with my peltier elements! Thanx!

I have the laser bee USB and its a decent product; identical technology to the one tested here - a peltier cooler blackened and used as a sensor. The canadian guy who designed it seems to have done a reasonably competent job and probably calibrated the original design. I haven't opened the case, but it probably contains an opamp, AD converter and USB stuff. It gives the same sort of results as the unit here, green laser diodes put out much more power than the red, and the violet (blu-ray diodes?) are stupid powerful. Accuracy is probably about the same +/- 20% as environmental factors around the sensor are a big contributor to error -- the average human is radiating ~100W, albeit over a much larger surface area, but that is still a lot of noise compared to mW range laser diodes. The peltier elements are not designed as sensors, so their manufacturers are probably not much interested in unit-to-unit variability, provided they all meet some minimum cooling/W spec. Calibration of each unit is then the key to accuracy when used as a sensor, and calibration takes time and therefore money. I've been more interested in interferometry stabilized he-ne lasers, and they are only micro-watt power output , which is well below the noise floor of any (hobbyist) peltier device. I've tried these devices: digikey.com/en/products/detail/marktech-optoelectronics/MT03-003/5866633 where you at least get a spec sheet with a current output curve as a result of infalling irradiation power. You also then have a wavelength dependency; the few photodiodes I've tested show minimal unit-to-unit variation, an encouraging sign. What's the absolute accuracy? Back to the calibration and money question. The photodiodes should be able to handle several mW power, but anything in the W range is likely going to destroy them.

Offtopic but i've read you're interested in it and i have an emf-390 if you ever need more data on experiments about radiofrequency or alternating electric and magnetic fields. Awesome instrument, it is directional though. In the rf it is responsive in the 30mhz - 10ghz range. Actually it is sensitive up to about 10.5 and the lowest i got was 433mhz with a walkie talkie. Another fun thing are microwaves ovens. I have a shielded one, mind you, but i could still see the continuous signal from another room 2m upstairs close to the floor (0,300 milliWatts) so very weak but cool. I discovered some light switches when clicked create a small rf pulse and my xiaomi phone in airplane mode (wifi and bluetooth off too) was doing two pings when i turned the dispay on and off. Fixed it later, had to do with bluetooth. I can see when a call is coming about 5 seconds before the phone starts ringing. The biggest source of mf i have found is my lawn mower when operating and ef is my scooter when charging, both detectable from 4 meters away. Even a cable not plugged in any outlet but touching another one that is plugged in has an ef detectable at the other end, even though they're made of insulating materials.. and i can't detect any magnetic field being generated that could somehow induce the current so boh? Actually i'm sure almost anyone in the comments has some kind of measuring device here, we should do a telegram group to create a squad to run multiple experiments with different measruing units.

I always learn something from you! I also would love to see a DIY solution for a more "scientific" power meter. I would also buy products from you if you were to set up a store that we can access in the West. You guys are awesome. you are a perfect compliment to @brainiac75

Thank you, great ! And yes, a cheap DIY solution would be great because for such a rare use the costs should be as tiny as possible !

Awesome! Learnt something new!❤ What are this peltier devices made from? Looks like porcelain? Google tells this is an alloy from Bismuth2 Tellurium3, a rather exitic material. I guess its resonance frequencies are outside the visual range to give such a linear measurement. Weird stuff.

On the topic of thermal sensing, I recently got a cheap diamond tester to review (Diamond Selector II). It has a little metal probe that is warmed up and put on the surface of the stone to be tested, and measures the heat flow to the stone. Apparently diamond conducts heat more than fakes. I tested it on silver, copper, steel, glass, etc. and it could easily detect copper and silver due to their greater heat conduction. An interesting characteristic of a material to measure.

It would be interesting to see the effect of different "black" or "ultra black " paints

11:54 Some RMS meters use a thermopile to handle any waveform and bandwidth.

ive seen some laser power meters in equipment by having a small mass of material (aluminium for example) coated in a highly absorbing paint or soot, its connected witha thin short rod to a larger mass to sink heat away. both masses have a temperature sensor and the difference gets measured which can be used to calculate the amount of power absorbed

Another entertaining and informative video. Cheers!

I used to use a bolometer to measure microwave power, and it worked on a similar principle...

Your video title needs SEO love, dunno if we will remember "it" refers to a laser power meter later

Please narrate the video yourself vs ai

Doesn't the peltier module measure different wavelengths differently? I mean red is hotter than blue! Great video! Bot boy rulz!