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

Gq Gmc 320 Plus Geiger Counter Nuclear Radiation Detector Meter

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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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Description

⚡ Stay ahead of invisible threats with precision and style!

UNIVERSAL CONNECTIVITY - USB powered & chargeable with included rechargeable battery for on-the-go use.
ERGONOMIC SWIVEL DISPLAY - Auto 180° rotating dot matrix LCD ensures effortless reading from any angle.
SEAMLESS DATA MANAGEMENT - 1MB internal memory logs radiation history for later PC analysis via USB.
REAL TIME RADIATION TRACKING - Instant beta, gamma & X-ray detection with per-second data updates.
MULTILINGUAL SUPPORT COMMUNITY - Access online manuals in multiple languages plus expert forum backing.

The GQ GMC-320 Plus is a compact, professional-grade Geiger counter designed for real-time detection of beta, gamma, and X-ray radiation. Featuring a high-sensitivity M4011 tube, 1MB onboard memory for continuous data logging, and a unique 180° swivel dot matrix LCD, it offers unparalleled convenience and accuracy. Rechargeable via USB and supported by free PC software and multilingual manuals, it’s ideal for health-conscious professionals, researchers, and environmental evaluators seeking reliable radiation monitoring anytime, anywhere.

Specifications

ASIN	B013S9FO8M
Batteries	1 Lithium Ion batteries required. (included)
Batteries Required?	No
Batteries included?	Yes
Best Sellers Rank	95,526 in Business, Industry & Science ( See Top 100 in Business, Industry & Science ) 325 in Inspection & Analysis 404 in Hazardous Material Handling
Customer Reviews	4.4 4.4 out of 5 stars (414)
Date First Available	29 Oct. 2014
Guaranteed software updates until	unknown
Item Package Quantity	1
Item Weight	142 g
Item model number	320 Plus
Manufacturer	GQ Electronics LLC
Part Number	GMC320Plus
Product Dimensions	12.7 x 7.11 x 7.54 cm; 141.75 g
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
Voltage	3.7 Volts

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

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