What operating systems does the software work on? I have linux so am concerned that I'll not be able to get the data off the device.

I have Windows and it works on that, would suggest you look at website and download software to test

Does it measure radon levels

No is the simple answer. Radon emits alpha particles, the GQ GMC-320+ measures beta, gamma and x-ray. Geiger counters that measure alpha tend to be more expensive, I think starting around £300-£400 upwards. Also check out the UK Govt site at: http://www.ukradon.org/information/measuringradon as that might be more cost effective if you're looking at your own home for example.

Can you detect radiation from radioactive objects ? For example: test tuna canned fish, considering that the fish was caught from a radioactive area ?

Yes, that is what this thing was designed for. Note, such radiation will be very small and even air will block it. Place the meter very close to the object and wait a couple of minutes to check if the count increases.

They say sunlight affects the readings. a problem with the gm tube used. has this issue been resolved?

Some contain a glass Gm tube however mine contained a metal one, I assume the affected ones have the glass tube but don’t understand how sunlight affects reading as the particles need to penetrate the glass tube to have an effect

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☢️ Detect danger before it detects you – precision radiation monitoring in your palm!

RELIABLE PORTABLE - Lightweight 220g design with included rechargeable lithium-ion battery for on-the-go safety.
FLIP READ CONVENIENCE - Auto swivel display ensures effortless monitoring from any angle.
SEAMLESS PC INTEGRATION - USB port lets you record, playback, and analyze data with GQ software.
MULTILINGUAL USER SUPPORT - Access online manuals in English, German, French, and more for global ease.
INSTANT RADIATION INSIGHTS - Stay ahead with real-time, per-second radiation data updates.

The GQ GMC-320 Plus is a compact, hand-held Geiger counter designed for precise detection of beta and X-ray radiation. Featuring a dot matrix LCD with auto-rotating display, real-time per-second data recording, and USB connectivity for seamless PC integration, it empowers professionals to monitor radiation levels accurately anywhere. Lightweight and rechargeable, it comes with multilingual support and a robust warranty, making it an essential tool for safety-conscious managers and tech-savvy users alike.

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Manufacturer	GQ Electronics LLC
Part Number	GMC320Plus
Product Dimensions	12.7 x 7.11 x 7.54 cm; 220 g
Batteries	1 Lithium Ion batteries required. (included)
Item model number	320 Plus
Voltage	3.7 Volts
Item Package Quantity	1
Special Features	Automatic data recording and play back from PC later, Money back warranty within 30 days and one year factory warranty, Newly designed digital Geiger Counter/Data recorder,Record the radiation data. Play it back later, Open communication protocol for wide range radiation network support made easy., Technical support forum from GQ Electronics website
Batteries included?	Yes
Batteries Required?	No
Item Weight	220 g

GQ gmc-320 Plus Geiger Counter Nuclear Radiation Detector Meter Beta Range X Ray Europe

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