GQ Geiger Counter Nuclear Radiation Detector Meter Beta Gamma X ray GMC-320+V4

USA Manufacturer, FreeDataSoftware,Graph,1YearWarranty

(4623)

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US $108.98

as low as $37.18/mo with

Condition:

New

Quantity:

More than 10 available3,191 sold

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Breathe easy. Free shipping and returns.

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Free local pickup from Seattle, Washington, United States 98134

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Free 2-4 day delivery

Get it between Sat, Oct 4 and Tue, Oct 7 to 94104.

Located in: Seattle, Washington, United States

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30 days returns. Seller pays for return shipping.

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eBay item number:281259657729

Last updated on Jul 24, 2025 16:40:20 PDTView all revisionsView all revisions

Item specifics

Condition: New: A brand-new, unused, unopened, undamaged item in its original packaging (where packaging is ...

Brand: GQ

Type: Dosimeters

MPN: GMC-320+V4

Country/Region of Manufacture: United States

Radiation Detector Type: Geiger Counter

Item description from the seller

About this seller

Joined Jul 2011

Usually responds within 24 hours

GQ ELECTRONICS LLC is a registered technology company based in Seattle WA, USA.

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Detailed seller ratings

Average for the last 12 months

Accurate description

5.0

Reasonable shipping cost

4.9

Shipping speed

5.0

Communication

5.0

Geiger Counter Nuclear RadiatiElectronics ComponentOther

Seller feedback (4,620)

This item (167)

All items (4,620)

a***s (91)- Feedback left by buyer.
Past month
Verified purchase
Shipped and arrived fast which is always appreciated. Can’t speak yet to its’ accuracy. Got a little reaction from the smoke detector. A little more in the “normal” range here and there. I like that it audibly clicks as the readings go up. I mainly got it because my cat is going in for radiation treatment for her hyperthyroidism and will be radioactive for a couple of weeks when she comes home. Got it to monitor that. Went with this particular one as it was well reviewed. A+++ for fast delivery.
8***7 (63)- Feedback left by buyer.
Past 6 months
Verified purchase
Brand new in great condition. I gave it a small test and it seem to work well for the value and I like the display screen it shows all the readings as suppose to do looks great.
e***e (42)- Feedback left by buyer.
Past year
Verified purchase
Shipped fast. The counter is brand new, well packaged and fully charged when recieced. It also comes equiped with a USB type C connector, which is very useful. It is a very interesting scientific tool and teaching aid. The dot matrix screen is clearly readable and also backlit. I would recommend also finding some source of radiation to test it out, because background radiation is not very high. I would definetely buy it again.

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Product ratings and reviews

4.8

71 product ratings

57 users rated this 5 out of 5 stars
13 users rated this 4 out of 5 stars
0 users rated this 3 out of 5 stars
0 users rated this 2 out of 5 stars
1 users rated this 1 out of 5 stars

Good value

Would recommend

Good quality

Most relevant reviews

See all 51 reviews

by debrac8655
Jul 05, 2016Top favorable review
Great value at double the price
I,ve been using my home built Geiger counter for a few years but it's crude compared to the GMC 320 + . I really like the data logging feature, wish I had it while I worked the X-Ray for TSA it would have been interesting to know my daily exposure. The Lithium Ion battery seems to run forever between charge cycles and it comes with both house and car charger so you will never run short in the middle of a prospecting trip. All settings are easy and intuitive and will readout in whatever standard you are most comfortable with. The Grandkids can play hide and seek, find the uranium rock in grandpaws house with ease so it is easy to use and seems fairly sturdy. ( Yes Grandpaw is a bit strange ) the only negative I can find is that the click volume can't be adjusted louder, but then ... I,ve been using my home built Geiger counter for a few years but it's crude compared to the GMC 320 + . I really like the data logging feature, wish I had it while I worked the X-Ray for TSA it would have been interesting to know my daily exposure. The Lithium Ion battery seems to run forever between charge cycles and it comes with both house and car charger so you will never run short in the middle of a prospecting trip. All settings are easy and intuitive and will readout in whatever standard you are most comfortable with. The Grandkids can play hide and seek, find the uranium rock in grandpaws house with ease so it is easy to use and seems fairly sturdy. ( Yes Grandpaw is a bit strange ) the only negative I can find is that the click volume can't be adjusted louder, but then Grandpaw is a bit deaf. The sound can be turned off so you can pop it in your pocket and data log all day without freaking people out It really would be a bargain at double the price, get one before the next Fukishima.
Verified purchase: YesCondition: NewSold by: gq_instruments
by jayofto
Apr 15, 2017
GMC-320 Plus Geiger Counter
I did lots of searching and reading about the many Geiger Counters out there on the market. They range from old to new, cheap to expensive, and complexity or simplicity. I bought the GMC-320 because of the price and specs. This unit has a lot of "Bang for the Buck". This unit is simple to use, and has a long rechargeable battery life. As soon as you turn it on, it will show you the background radiation in Counts/second & uSv/hour. You can also select to show a graph images. This unit also acts as a Data-Logger. You can plug it into your computer, and with the downloaded software, you can view the data on a larger screen with a time stamp. I have seen some negative remarks about the unit's selector buttons, but I don't have any complaints about them. I guess if you handle this unit roughly, ... I did lots of searching and reading about the many Geiger Counters out there on the market. They range from old to new, cheap to expensive, and complexity or simplicity. I bought the GMC-320 because of the price and specs. This unit has a lot of "Bang for the Buck". This unit is simple to use, and has a long rechargeable battery life. As soon as you turn it on, it will show you the background radiation in Counts/second & uSv/hour. You can also select to show a graph images. This unit also acts as a Data-Logger. You can plug it into your computer, and with the downloaded software, you can view the data on a larger screen with a time stamp. I have seen some negative remarks about the unit's selector buttons, but I don't have any complaints about them. I guess if you handle this unit roughly, you may damage them, but hey, it's a delicate instrument, you don't want to drop this unit as it does have a delicate internal glass tube. I wanted to be able to detect any dangerous radiation in food or my home and surroundings, after reading about the Fukushima disaster. I am happy with this purchase.
Verified purchase: YesCondition: NewSold by: gq_instruments
by slacksystems
Feb 28, 2017
Pocket sized, Lightweight easy to use!
What a great little device this Geiger counter is!, ive been using it now for a bit over a week and its great to go second hand shopping to find uranium glass or radium watches, some items i have found, it detected them within centimeters from the item.. battery lasts a long time on a single charge, and the data logging feature is great, i would defiantly recommend this great little gq gmc-320pluss so any one !! its soo good i actually bought a second one to keep in the car! What a great little device this Geiger counter is!, ive been using it now for a bit over a week and its great to go second hand shopping to find uranium glass or radium watches, some items i have found, it detected them within centimeters from the item.. battery lasts a long time on a single charge, and the data logging feature is great, i would defiantly recommend this great little gq gmc-320pluss so any one !! its soo good i actually bought a second one to keep in the car!
Verified purchase: YesCondition: NewSold by: gq_instruments
by beautifulradiation
May 23, 2017
Mini Geiger counter
Really convenient and fits in your pocket. Does measure some energetic alpha radiation. Measures ~300 cpm with an alpha source that measures 40,000 cpm on a "professional" Geiger counter. Very convenient when checking minerals for radioactivity if you collect radioactive things. I can't always bring my favorite, and very accurate Geiger counter. This detector has an alarm when the level gets high and the flashing light that is triggered With an event flashes green, but turns yellow, then red when levels get high. The beeping alarm goes off when the light turns red. Keeps going until you leave the radiation zone or remove the source. I reccomend this Geiger counter as a backup or for checking for radiation sources. I really like this Geiger counter, even if it's just a backup or for finding ... Really convenient and fits in your pocket. Does measure some energetic alpha radiation. Measures ~300 cpm with an alpha source that measures 40,000 cpm on a "professional" Geiger counter. Very convenient when checking minerals for radioactivity if you collect radioactive things. I can't always bring my favorite, and very accurate Geiger counter. This detector has an alarm when the level gets high and the flashing light that is triggered With an event flashes green, but turns yellow, then red when levels get high. The beeping alarm goes off when the light turns red. Keeps going until you leave the radiation zone or remove the source. I reccomend this Geiger counter as a backup or for checking for radiation sources. I really like this Geiger counter, even if it's just a backup or for finding sources of radiation. Trust me, I'm a nuclear engineer.
Verified purchase: YesCondition: NewSold by: gq_electronics_llc
by ewoglightstar
Jun 24, 2016
Great little geiger counter!
Probably the cheapest price you can find! It works great for use when looking at radioactive mineral samples. I use this for personal use with my own mineral collection. Can't wait till I get the chance to test it in the field! Highly recommend if looking for a cheap Geiger counter!
Verified purchase: YesCondition: NewSold by: gq_instruments

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