| T O P I C R E V I E W |
| Stargazer 40 |
Posted - 08/14/2024 : 14:48:23
Is there a review here that I missed? Looks like a nice device. What's in it as far as detectors and firmware? Options.
Thanks |
| 31 L A T E S T R E P L I E S (Newest First) |
| nonus |
Posted - 08/30/2024 : 07:29:27
I also want to buy GQ Radon Pro, but now it is difficult. Maybe there is a version of GQ Radon Pro for the Chinese market, like gmc-3140 (3150)? On Aliexpress the price of Chinese devices is 120-200 $. |
| Stargazer 40 |
Posted - 08/30/2024 : 02:22:55
A version of the meter you're posting is for sale at Walmart for $385 US. The GQ meter with the added GM feature is $148 US and Radon alone is $98 US on Amazon. GQ's hardware is proprietary but likely similar as you surmise. GQ meters have always had a huge value component which is why I bought their complete line of GM meters over the last few years.
Don't expect to see anyone open up one of these. Voids warranty. Currently comparing my GQ Radon Pro's results with a Safety Siren Radon Pro 3 (actually a pair of those). Will report back when that is completed. Already very pleased with performance of both the Radon ionization chamber Radon readings and the GM readings as well. |
| nonus |
Posted - 08/29/2024 : 14:29:41
What's inside gmc-pro radon geiger?
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| Stargazer 40 |
Posted - 08/29/2024 : 03:58:26
The GQ Radon Pro 2 in 1 combines a Geiger Mueller tube radiation meter with the radon ionization chamber for a much more versatile consumer tabletop radiation detector. I think components made in China but GQ historically has done final assembly and calibration here in US. At least that's my understanding. |
| nonus |
Posted - 08/27/2024 : 08:30:56
It looks like this is a similar one in China, one factory?
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| GTS |
Posted - 08/21/2024 : 11:34:43
Some interesting videos about radon:
h**ps://www.youtube.com/watch?v=TYZglUjLE0Y&t=309s |
| Stargazer 40 |
Posted - 08/21/2024 : 07:44:16
It was very straight forward to connect to the GMC map display and the Android phone app is very nice. Put in User ID and device ID and it uploads both numbers to respective map. Added another point to Radon map so 13 or 14 users out there at this point. |
| Stargazer 40 |
Posted - 08/21/2024 : 07:39:40
That's why I started this thread.
The ionization chamber may be proprietary for radon measurement. The discussion above is the method. The same GM tube that is in the 800 appears to be in the Pro so that both are measured and displayed. You can find the demo software on the download page. These are not portable and need to be plugged in to a 5v USB-C charger. They are just nice to wander by and get updated. It does have alarms for both GM and Radon so if that should occur you will know. Working through menus shows the same six point calibration as the GMC-800 for GM meter portion. Voltage is controlled as with the GMC-800. Although voltage is different between the Pro and the GMC-800, the calibration points are the same, which is why I think it the same J321 GM tube inside the Pro.
Calibration of the Radon measure is not clear to me yet. It may be as simple as the sensitivity of the chamber * current so nothing to calibrate. There is a calibration process whereby it is zeroed in an area with no radon present. I tried that outdoors in a breeze and still seeing where it settles compared to my Safety Siren Pro 3 radon meter.
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| Stargazer 40 |
Posted - 08/21/2024 : 07:26:54
Certainly they are sold on Amazon US at least.
https://www.amazon.com/dp/B0D99C2GSG?ref=ppx_yo2ov_dt_b_fed_asin_title
https://www.amazon.com/GQ-Radon-Radonscan-Radiative-continuously/dp/B0DBNPTNSV/ref=sr_1_3?crid=30OAIYC9KB5H&dib=eyJ2IjoiMSJ9.4VA49nl_1gerFijxhtEIPGkf6lNOauqqanKX0c9ulmQs8qYldlvYhOS54Clvq9SKvywsqvjQdWQD-1siELF0MK6lzQKzkWgjIrlZVStRdhZH4J9lmhO4yLgQCDEfdGsUdb8iDHepbnsShwL_OwHrvWEmTg0DYwNWWX4XWT6FaO8bCWUmALPHfcv77rCVC1YZoVoGu-4CJTxSOsdB3cvjjU7wce4fxE0PzjYQbl1aJ-A.3ovd0FNJcmLkA1U2E9Nph40z2TsfsW18D0-9rYNU5EU&dib_tag=se&keywords=gq+radon+scan&qid=1724253923&sprefix=gq+radon+scan%2Caps%2C142&sr=8-3 |
| ullix |
Posted - 08/21/2024 : 07:12:52
What on earth are these 2 Radon devices from GQ?
I see a "GQ RadonPro 2-in-1 Radon Gas and Radiation Monitor" gor USD 150 and a "GQ RadonScan Radon Gas Monitor" for USD90 on GQ's shopping page. Interestingly, those are not sold by Amazon, neither in Europe nor in the US.
The description of both is blahblah, to say it politely! This is as empty and hollow as a description can get.
What is the work principle? What is the system in it? What is the sensitivity of it? Nothing is said.
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| Stargazer 40 |
Posted - 08/20/2024 : 04:54:32
I am not well versed in the ionization chamber approach to radon measurement so thought it would be nice to get example of one of these and the steps taken. Pretty straight forward:
For a typical end window ionization chamber, the conversion formula to relate the ionization current to radon concentration in picocuries per liter (pCi/L) involves several factors, including the chamber’s sensitivity, the applied voltage, and the specific characteristics of the fill gas. Here’s a general outline of how this conversion is typically approached:
Ionization Current Measurement: The ionization chamber measures the current generated by the ion pairs created by radon decay. This current ((I)) is proportional to the radon concentration.
Sensitivity Factor: The sensitivity of the ionization chamber ((S)) is a crucial parameter. It is usually provided by the manufacturer and is expressed in terms of current per unit radon concentration (e.g., amperes per pCi/L).
Conversion Formula: The radon concentration ((C)) in pCi/L can be calculated using the formula:
C=SI
where:
(I) is the measured ionization current (in amperes).
(S) is the sensitivity of the ionization chamber (in amperes per pCi/L).
Example Specifications for a Typical End Window Ionization Chamber:
Fill Gas: Argon or Xenon
Fill Pressure: 800-1520 torr
Operating Voltage: 500-800 volts
Gamma Sensitivity: Approximately (2.8 \times 10^{-10}) A/R/hr for Co-601
Temperature Range: -40 to 100°C
These specifications can vary based on the specific model and manufacturer. For instance, the LND 52071 model uses xenon gas at 800 torr and operates at 500-800 volts |
| Stargazer 40 |
Posted - 08/20/2024 : 04:29:25
The ionization chamber measures current not counts so on the radon map the CPM warning ranges need to be changed to what's on the card that came with the meter:
 |
| Stargazer 40 |
Posted - 08/20/2024 : 04:11:10
I will sign up for these with this 2 in 1 meter and see how easy it is to have my data displayed. As a consumer device, perhaps something you pass by and glance at during the day, simplicity in seeing how your measurements 'fit in' with those around you is paramount. Haven't used this feature much. Not being able to delete a manually entered point I take to mean there is a history that is retained and if the manually entered point is entered but way off of reality then the whole string of data is corrupted, and you need to initialize the string again. I would suggest you could also contact support to see what options there are to correct data from their side.
Probably not a good idea to manually enter data if the device is working as intended. |
| ullix |
Posted - 08/20/2024 : 02:48:35
Indeed, "pCi" seems to be the URL GET parameter required to post a Radon value.
But the whole thing is rather half-baked, and awkward to use.
There are now 2 websites with identically named maps ("Real-Time Radiation World Map"), showing EITHER the Radon dots, or the classic CPM dots. Yet clicking on a single dot does give the history, but ONLY of the classic data, and ignores the Radon data. On both maps.
One also cannot delete any wrong points, except for deleting all of it.
I could use this URL code for the classic page, extended with a pCi value, to place data on both maps:
h**p://www.gmcmap.com/log2.asp?AID=123&GID=456&CPM=11.0&ACPM=12.0&uSV=1.30&pCi=1.40
While the classic values are shown on the Radon map when clicking on a dot, they are not shown on the map, and Rado values are not included in the history.
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| GTS |
Posted - 08/19/2024 : 19:06:33
Yes and yes. You get access to both maps with your AID and GID. |
| Stargazer 40 |
Posted - 08/19/2024 : 15:36:29
quote:
Originally posted by GTS
This works:
h**p://www.gmcmap.com/log2.asp?AID=zzzzz&GID=xxxxxxxxxxx&pCi=2&CPM=25&ACPM=17.28&uSV=0.13
It posts on both maps with that line? Which means if you sign up on both maps then the Pro 2 in 1 meter will send a single data point with data for both maps.
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| GTS |
Posted - 08/19/2024 : 09:48:28
This works:
h**p://www.gmcmap.com/log2.asp?AID=zzzzz&GID=xxxxxxxxxxx&pCi=2&CPM=25&ACPM=17.28&uSV=0.13
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| Stargazer 40 |
Posted - 08/19/2024 : 04:29:22
Logic says change uSV to pCi and put in number. Rest remains the same unless the Radon Ionization Chamber reports something other than counts?? |
| ullix |
Posted - 08/19/2024 : 04:11:35
quote:
Why would it be different?
Because it lacks a place for the Radon value?
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| Stargazer 40 |
Posted - 08/18/2024 : 03:02:31
quote:
Originally posted by ullix
quote:
This 'index_r.asp' could well be the equivalent to 'log2.asp' on the Geiger counter map, but what needs to be known is what comes after that, i.e. the AID, GID, and other parts!
You just add the rest from your example.
?AID=01234&GID=12345678901&CPM=44&ACPM=46&uSV=0.30
Why would it be different? |
| nonus |
Posted - 08/18/2024 : 01:37:40
I was able to register the device for radon. Need a universal program to collect radon data from different devices and transfer to the server.
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| ullix |
Posted - 08/17/2024 : 22:41:41
quote:
Well simple to look at URL and take all before coordinates (to .asp) from this map and add the rest. This is URL
https://www.gmcmap.com/index_r.asp
Compare with:
quote:
h**p://www.gmcmap.com/log2.asp?AID=01234&GID=12345678901&CPM=44&ACPM=46&uSV=0.30
This 'index_r.asp' could well be the equivalent to 'log2.asp' on the Geiger counter map, but what needs to be known is what comes after that, i.e. the AID, GID, and other parts!
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| Stargazer 40 |
Posted - 08/17/2024 : 16:39:52
I got my Radon Pro 2-1 GM meter today. I love the appearance of this. Colors are more soothing. Clarity of display wonderful. Looks nice like some of Amazon house control Alexa cylinder devices. I need to check ullix's inside the 800 post as the calibration points are the same as the 800 so likely the same GM tube. I will add pics shortly but have already set up my Safety Siren Pro 3 radon gas detector. That takes two days to get good reading. We'll see how it does one floor up from basement and then in basement. My pCi/L has been around 2.3 - 2.5. It will be a couple days then before I move it to next spot.
I got my 800 meter yesterday and for me another win for GQ. Lighter than the 500+ and 600+. Rubber grommet/edge gives good feeling about drop protection. Voltage in 800 set to 44 using the AA Lithium Ion Battery. The Pro gets 5V from AC converter through USB C plug and voltage setting is 20. What range of voltage numbers are you all seeing in the 800? |
| Stargazer 40 |
Posted - 08/17/2024 : 11:02:45
Well simple to look at URL and take all before coordinates (to .asp) from this map and add the rest. This is URL
https://www.gmcmap.com/index_r.asp
r for radon perhaps. Might be that easy.
The radon pro arrives today. Tabletop kind of makes it fit in Echo or other home control appliances. Perhaps GQ could create a link to ask Alexa for current radon and radiation numbers. |
| ullix |
Posted - 08/17/2024 : 03:05:19
Oh, look at this, GQ now also has a Radon map! But it seems so new that there is no guidance at all on how to put data on it. Does anyone know?
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| nonus |
Posted - 08/16/2024 : 23:49:21
The map from gmc displays radon gas concentration readings.
 |
| ullix |
Posted - 08/16/2024 : 22:31:14
Neither GeigerLog nor any other user-software can reprogram the gmcmap server! But this is what you are asking for.
You can interpret any of the 3 values CPM, ACPM, uSV as you wish and upload your numbers in whatever units you wish. But you might end up as the only person doing that and so it will not be very helpful.
You might want to look out for other similar maps, which may be offering the Radon support.
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| nonus |
Posted - 08/16/2024 : 09:18:00
I have radex mr107+, sun nuclear 1027, Airthings 223. Can I transfer radon gas readings to gmcmap. Units Bq/m3 or pCi/l? |
| ullix |
Posted - 08/16/2024 : 07:55:39
You can post anything you like to the gmcmap, be it real or complete fake!
You need to register on the gmcmap site and obtain a userID and a deviceID. A userID is like 12345, a deviceID is like 12345678901. Then call the gmcmap site with any browser with e.g. such a command:
h**p://www.gmcmap.com/log2.asp?AID=01234&GID=12345678901&CPM=44&ACPM=46&uSV=0.30
and you will have placed CPM=44, ACPM=46, and uSV=0.30 on the gmcmap at the position you have registered.
GeigerLog can also do such posting from any device known to GeigerLog. |
| nonus |
Posted - 08/16/2024 : 07:33:17
There are only 9 points with readings on the map. I wonder if it is possible to transfer readings to the gq map from devices of other manufacturers. |
| Stargazer 40 |
Posted - 08/16/2024 : 04:29:22
So no reviews or discussion yet. Ordered it and will share with you all how it compares to both my Safety Siren Pro 3 radon gas detector and my 500+ and 600+ meters. Will do the same with the GMC-800 that arrives later this afternoon. |
