Uploaded October 2024 | Updated September 2026, 3 weeks ago
Overview and test of the GMC-300S
The GMC-300S is a Geiger counter model that I appreciate for several reasons such as: it is American designed🇺🇸 the battery is replaceable and easy to find, the muller tube can be replaced easily and the price is less than $100. Ergonomically the GMC-300S is comfortable to hold... it certainly does not have the compactness of the RADEX ONE, but it costs a third and, I repeat, it has the replaceable muller tube.
Background radiation is a constant source of ionizing radiation present in the environment and emitted from a variety of sources. According to the United Nations Scientific Committee on the Effects of Atomic Radiation, there are four major sources of natural radiation: cosmic radiation, terrestrial radiation and intakes of naturally occurring radionuclides through inhalation and ingestion.
About Radon: Radon comes from decaying Uranium that is contained in the rock and soil beneath the basement (under the foundation) of every home. Being in constant contact with the ground, a home's basement is the main entry point for Radon gas.
Please note: This is not a sponsored video, I personally purchased this device for my scientific interest.
PS: My dad says it looks like a thermostat😁
#nuclear #radiation #geiger
Overview and test of the GMC-300S
The GMC-300S is a Geiger counter model that I appreciate for several reasons such as: it is American designed🇺🇸 the battery is replaceable and easy to find, the muller tube can be replaced easily and the price is less than $100. Ergonomically the GMC-300S is comfortable to hold... it certainly does not have the compactness of the RADEX ONE, but it costs a third and, I repeat, it has the replaceable muller tube.
Background radiation is a constant source of ionizing radiation present in the environment and emitted from a variety of sources. According to the United Nations Scientific Committee on the Effects of Atomic Radiation, there are four major sources of natural radiation: cosmic radiation, terrestrial radiation and intakes of naturally occurring radionuclides through inhalation and ingestion.
About Radon: Radon comes from decaying Uranium that is contained in the rock and soil beneath the basement (under the foundation) of every home. Being in constant contact with the ground, a home's basement is the main entry point for Radon gas.
Please note: This is not a sponsored video, I personally purchased this device for my scientific interest.
PS: My dad says it looks like a thermostat😁
#nuclear #radiation #geiger




![DIY Geiger Counter with Test ☢️
I built a Geiger Counter Station and tested it with REAL Radium! This Counter has been designed to be active h24, if necessary and it can be powered with a small 12V battery. It has a visual alarm (LED) and sound alarm (Buzzer) detects radiation γ and β in range of 20mR/h ~ 120mR/h of gamma rays and 100 ~ 1800 off variables/points/cm 2 of the soft beta ray.
● What is a Geiger Counter?
A Geiger counter is an instrument used for detecting and measuring ionizing radiation, it is widely used in applications such as radiation dosimetry, radiological protection, experimental physics, and the nuclear industry. What you see in this video is not a portable device but to be kept hanging in the Laboratory.
● Natural Radioactive Background:
In the absence of radioactive material it is possible that the geiger counter emits small sounds, this detection you hear is the normal natural radioactive background. The natural background is due to the sun, stars and cosmic background noise. is harmless and is the only safe source of radioactivity to test your instrument.. But in this video I will something dangerous, Ill try it with some RADIUM!
● About my Nuclear TEST ☢️
For the test I will use an old Clock as a radioactive sample, this is possible because the brown substance on clock hands and next to the hours is, unfortunately, Radium Paint. Who decided to use radium in the paint, created a beautiful but lethal substance... in the past it wasnt known that radioactivity was toxic. What I did in this video is very dangerous, dont do it too, and if you should have one of these clocks in your home (table or wrist) please dispose of it as soon as possible according to the laws of your country.
● Radium & Paint with Radium:
Radium is a chemical element with the symbol Ra and atomic number 88 and it is a radioactive element! Radium was discovered by Marie and Pierre Curie in 1898 - In fact the word Radioactivity derives from the name of this element. Paints containing Radium were used from years 1920 to 1960.. and this because it emitted light and no one was aware of their toxicity.
● Radium (Ra) Chemical Properties:
Atomic number: 88
Atomic mass: 226.0254 g.mol -1
Electronegativity according to Pauling: 0.9
Density: 5 g.cm-3 at 20°C
Melting point: 700 °C
Boiling point: 1140 °C
Vanderwaals radius: 0.230 nm
Ionic radius: unknown
Isotopes: 6
Electronic shell: [ Rn ] 7s2
Energy of first ionisation: 509.1 kJ.mol -1
Energy of second ionisation: 975 kJ.mol -1
Half Life: 1602 years
Discovered by Pierre and Marie Curie in 1898
● Components & More:
Geiger Module: https://www.banggood.com/custlink/DmvDo7Oq5z
PLA Case: https://www.thingiverse.com/thing:3766612
PLA Handle: https://www.thingiverse.com/thing:4643658
My CNC: https://youtu.be/qPVDsh93Zi8
● Feature of this Geiger Counter Station:
5V power supply
Sound and Light alarm
Ardunio compatible
supports most of the Geiger tube
380~550V operating voltage for Geiger tube
Support computer data acquisition
γRay 20mR/h~120mR/h (GAMMA)
βRay in range 100~1800 (BETA)
Beta and Gamma radiation detetion.
12V Battery (A23 – A27) for short uses only.
220/12V Transformer for H24 use
Protection with glass fuse
● Other Video about this Geiger Module:
Geiger Counter Unboxing: https://youtu.be/6KYKToTKO9E
Portable Geiger Counter: https://youtu.be/E-9_hCpqNaY
● Music Credits:
Fast and Run - Nico Staf (Assembly)
Enigmatic - Bensound (Radium Explanation)
● Chapters:
0:00 - Intro
0:08 - Explanation
0:47 - Construction
1:18 - Geiger Module Diagram
1:22 - Construction
1:31 - 5V Stabilizer Diagram
1:34 - Construction
3:27 - Final Result
3:38 - Main Circuit Diagram
3:41 - About Nuclear Test
4:02 - What is Radium (Ra) 88?
4:25 - NUCLEAR TEST
5:37 - Examples of Radium Clocks
6:15 - END
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Watch another video =)
● Music Keyboard: https://youtu.be/ajtR6eDOaQI
● LED Water Level: https://youtu.be/n9GB0nfwG8s
● Police Light: https://youtu.be/PtmEqcRbu4w
● Vu-Meter Stereo: https://youtu.be/l8oUQpGAOCw
● Traffic Light: https://youtu.be/6iRjZMHVvhs
● Vu-Meter 40 LED: https://youtu.be/oWB2faToGAA
● Voltage Detector: https://youtu.be/yRWRsSASQTc
WARNING: This video is only for demonstration. I dont take any responsibility.
#Geiger #Nuclear #diyprojects DIY Geiger Counter with Test ☢️](https://i.ytimg.com/vi/mX9nxZz2M4g/mqdefault.jpg)





