








⚡ Stay ahead of invisible threats with precision and style!
The GQ GMC-800 is a cutting-edge, portable Geiger counter designed for professionals and enthusiasts alike. It detects Beta, Gamma, and X-ray radiation with high accuracy, featuring a large color LCD, five customizable alarm types, and a rechargeable lithium-ion battery with Type-C charging. Compliant with US National Standards, it offers real-time monitoring, dosimetry, and extensive data logging with up to 10 years of memory, making it an essential tool for personal safety and environmental awareness.










| ASIN | B0CKM8NML7 |
| Batteries | 1 Lithium Ion batteries required. (included) |
| Batteries Required? | Yes |
| Batteries included? | Yes |
| Battery Cell Type | Lithium Ion |
| Best Sellers Rank | 2,812 in Business, Industry & Science ( See Top 100 in Business, Industry & Science ) 11 in Inspection & Analysis 16 in Hazardous Material Handling |
| Customer Reviews | 4.6 4.6 out of 5 stars (990) |
| Date First Available | 12 Oct. 2023 |
| Included components | Main Unit, Type-C Cable, Quick Start Guide, Safety Reference Card |
| Item Package Quantity | 1 |
| Item Weight | 67 g |
| Item model number | GMC-800 |
| Manufacturer | GQ Electronics LLC |
| Part number | GMC-800 |
| Product Dimensions | 6.99 x 12.5 x 1.5 cm; 67 g |
D**L
Accurate and pocket friendly
Perfect for my needs. I wanted a good balance between price, accuracy and quality. After several days of reviewing many radiation detectors, this one kept coming up as a highly rated product for its price point. If like me you are mainly interested in having this as a preparedness tool and playing with from time to time, I would highly recommend this device.
S**M
First reliable low cost high accuracy calibration pocket geiger counter on Amazon
For this review, I've uploaded my side-by-side background radiation comparison photos of this new American GQ GMC-800 Geiger Counter with the readings given by two far more expensive high-end, calibrated scintillation counters: a Thermo Radeye with external dual phosphor probe, and a Radiagem with a 2x2" NaI phosphor external gamma probe. The background readings are in a relatively high background region of Cornwall, not very far from the old South Terras Uranium Mine). Note that 300 nSv/hr = 0.3 uSv/hr, so that a GMC-800 reading of 0.3 uSv/hr is identical to the Radiagem's 300 nSv/hr. The American GMC-800 is accurate, lightweight, pocket sized and has just the features you need to rapidly check background gamma radiation. It will display counts/second, milli-Roentgens per hour (for the imperialists), uSv/hr, or counts/minute. The GMC-800's manufacturer's geiger tube gives 25 counts/second per mR/hr or per 2.5 uSv/hr (they use the RBE=1 conversion whereby 1 mR = 10 uSv). It also functions as a dosimeter, so you scroll through the options to display accumulated dose. You can also set the alarm threshold however high you like. Accuracy is within +/-20%. It comes with USB data and charge cord, a 3.7v lithium ion rechargable battery (AA sized) which is removable via a battery cover on the back, a soft dust proof case, and instructions plus radiation safety data "credit card" for a wallet, listing radiation levels and precautions needed. To turn it on, you need to hold the on/off button down for 4 seconds (probably to prevent it accidentally being turned on or off by keys or change in your pocket). The only disadvantage is that the AA sized 3.7v lithium ion battery cannot be substituted for a common AA 1.5 v battery in an emergency (it needs over 3v and won't work with a common 1.5v AA battery, I checked this). So you might want to buy a spare 3.7v lithium ion AA sized battery, or take a USB charge cable and portable phone charging power pack with you, if you want to ensure you don't run out of power. By default it makes a soft click every time a gamma ray is detected, the LED light above the display screen flashes with every "count". You can customise these settings. I have previously "tried" to buy two cheaper pocket geiger counters of other brands on Amazon, but both have been defective and been returned (I don't like reviewing totally defective products, as there's nothing to say and of course occasionally items are damaged in transit so you can't necessarily blame the product itself, which would create a misleading "review"). This American GMC-800 is brilliantly designed to do a straightforward job, does that job well, and I recommend it to anyone who needs to measure radiation.
S**P
Good overall quality meter , including case and rechargeable battery
I have previously owned one of the GQ300 meters and this is an upgrade. Simple and easy to use and a major improvement to the display. The measurements are broadly the same as with other GQ meters as they are using the same Geiger tube. Being fortunate and owning several other more expensive Geiger counters I have made some comparative measurements against an SEI monitor 4 (similar in size and tube size) and the GQ800 measurements were within a similar range. It is worth noting that this meter is unable to measure Alpha emissions but this is a feature of other similar tube designs that lack a mica window. For the money - yes and it comes in a handy case too.
S**S
quality.
bought this for my preppers survival collection,probably its to complicated for my use, however it covers everything so it will do the job,also I chose an american product, reason because the quality is better trusted than china tech.overall good quality,and informative instructions.
J**N
The real deal for detecting radiation and x-rays.
This is a true Geiger Counter in pocket size. It is fast reacting and has loud clicks and a loud alarm. It can measure Counts Per Minute, plus cumulative doses such as micro-Sieverts. It can also measure Beta as well as Gamma rays but I can’t test Alpha as they only travel a few inches in air. I use mine to check my personal outputs of Gamma rays for the first few days following Radium 223 injections where I output up to 1500CPM of Gamma and I am a potential danger to others. (The danger level for Gamma starts at about 50CPM!) This device may be useful for those whose houses are built on granite and who want to check for the hidden presence of Radon gas. I would also recommend it to anyone working with x-rays or in nuclear industries as it works faster than film badges and personal dosimeters and it has an audible alarm if safe limits are breached.
M**E
Works well
Checked with an old pre war ii watchband found that it is still radioactive.
D**K
First class radiation detector, sensitive, robust design with easy programming and data readout
All good with this tradition detector/reader/ Geiger counter. Well designed, robust body nice to the feel but also easy to decontaminate after use in real contamination risk scenarios. This GMC-800 is a professional nuclear radiation detector instrument made by a subject matter expert company, GQ Electronics, USA. I purchased this for just that reason, as an ex military expert and having dabbled withand been highly disappointed by a Chinese instrument that failed to perform adequately under test.
G**S
Not shielded from EMP
It worked well until I encountered electromagnetic pulses from overhead cables. The instrument suddenly, in a matter of seconds, gave false readings, alarms, and then ceased working completely. The moral is, do not use near power cables, it gives false CPM readings, and can be destroyed.
M**A
Very good product
J**A
I have been looking at Geiger counters for years, but haven't been able to justify the expense (until now). Basically, I wanted it because while I don't personally work with radioactive materials or radiation, I do work with people who do, and contamination does happen. So basically I was looking for something for everyday carry. I was also interested in confirming that granite and quartz counter tops, as well as tiles, were not radioactive. I also know a lot of people with antique china (some of which is radioactive). Okay, I mostly wanted it as a gadget, but okay, I also wanted it as a prep (eyes rolling). No seriously, if you ever actually need a Geiger counter as a prep, it might be too late to buy one. So I have a few basic preps, and now this is one of them. People often wear those little radiation dosimeter badges. I have often thought this was a bit weird, because basically they tell you that you were exposed a couple of weeks ago. Whoops - it would have been nice to have known that when the exposure was happening, so you could have stopped it. So I have been looking at a number of Geiger counters for a while, and the thing that pushed me over the edge, is that the cat was about to have I-131 treatment for hyperthyroidism (this is where the patient, in this case our cat, is injected with radioactive iodine to treat hyperthyroidism). The patient (again in this case our cat) ends up fairly radioactive for a few weeks. My biggest problem upon receiving the device is that I had no way to test it. I could find literally nothing in the house that was radioactive (thank goodness). None of the china was radioactive, none of the tiles and countertops are radioactive, and I couldn't find a single old watch or clock (i.e. with radioactive glow in the dark hands). When the cat's treatment started, this problem was solved. The cat was hot, the cat's thyroid was even hotter. The litter box was hot. The cat's vomit (sometimes invisible, except to the naked foot) was hot, and the cat unfortunately in one instance missed the litter box, so then that spot of carpet was hot. I really like the device. It has a very nice display and menu options. The battery life is great: I haven't checked, but I think it lasts more than 24 hours with the display continuously on. I like that it has a rechargeable battery that you can replace, and I like that you can recharge the battery via USB-C (i.e. while the device is running). I like that it has an alarm, so if the cat sneaks up on me, I know right away. The device is very light, so I can put it in my bag and forget that it is even there. Based on what I know, GQ is quite a reputable company in the affordable Geiger counter space. The plastic looks a bit brittle, but in practice I have (unfortunately) whacked it and dropped it a couple of times, without incident (thank goodness). There are still a few Geiger counter features that I would like (again, mostly thinking of this like a gadget): - A large and sensitive paddle tube - A mica window to detect alpha particles - A gamma spectrometer I also really like the idea of ultra compact Geiger counters (like keychain ones) for everyday carry, but in practice there is a tradeoff between size and sensitivity. One thing that would be really nice for everyday carry is bluetooth connectivity. It occurs to me that one of the most likely reasons to be exposed to radiation, is if someone you know is having some sort of medical treatment and hasn't told you. It would be super embarrassing if you were in a conference room, and your Geiger counter were to go off, because surprise, your boss's boss is having brachytherapy for prostate cancer. Awkward. So for everyday carry like this, it would be better if the device were just to inconspicuously show a notification on your phone. So I don't know if this will be my last Geiger counter, but this is the one that finally bought, after years of wanting one. All in all, I would say that the perfect Geiger counter is the one that you actually own, and that you are carrying when you are exposed. This is the one that pushed me over the edge, and so for me, right now, I would say this is the perfect Geiger counter.
A**X
Simplemente genial. Es un gran contador Geiger Muller. Tecnología USA perfecta. La batería dura muchísimo. Muy buena calidad. Mediciones bien calibradas. Mide por conteo por segundos y por conteo por minutos. Mide tanto en microsievert/ como en milirem/h. Tiene dosímetro. Tiene varias formas de alama. Alrma programable. Es muy fiable y mide correcto en relación con mis otros Geigers. Viene con funda protectora. Se puede actualizar su firmware. Una compra muy recomendable. Lo recomiendo.
A**E
In einer Welt, in der das Bewusstsein für Strahlungsrisiken stetig zunimmt, gewinnen Geigerzähler als unverzichtbare Werkzeuge für Sicherheitsbewusste und Vorbereiter („Prepper“) zunehmend an Bedeutung. Ein Geigerzähler, der zwar keine Unterscheidung zwischen den einzelnen Strahlungsarten trifft, aber dennoch eine zuverlässige und kosteneffiziente Überwachung bietet, kann eine ausgezeichnete Wahl sein. In dieser umfassenden Rezension beleuchten wir ein solches Modell, das sich durch sein hervorragendes Preis-Leistungs-Verhältnis auszeichnet und sowohl für Prepper als auch für alle Strahleninteressierten bestens geeignet ist. Design und Verarbeitung Der bewertete Geigerzähler besticht durch ein kompaktes und robustes Design, das sowohl im Innen- als auch im Außenbereich problemlos eingesetzt werden kann. Das Gehäuse ist aus widerstandsfähigem Kunststoff gefertigt, der stoßfest und wetterbeständig ist, wodurch das Gerät auch unter anspruchsvollen Bedingungen zuverlässig funktioniert. Die übersichtliche Display-Anzeige ermöglicht eine einfache Ablesung der Strahlungswerte, und die intuitiven Bedienelemente sorgen für eine unkomplizierte Handhabung, selbst für Einsteiger. Funktionalität und Bedienung Dieser Geigerzähler ist darauf ausgelegt, ionisierende Strahlung zu detektieren, ohne dabei zwischen Alpha-, Beta- und Gammastrahlen zu unterscheiden. Dies mag für einige Anwender eine Einschränkung darstellen, jedoch bietet es den Vorteil einer vereinfachten Bedienung und einer kostengünstigen Lösung für grundlegende Strahlungsmessungen. Die Geräuschemissionen des Geräts (z.B. Klicks bei erhöhter Strahlung) sind klar und deutlich, sodass auch ohne ständiges Blicken auf das Display eine unmittelbare Wahrnehmung von Strahlungsereignissen möglich ist. Genauigkeit und Zuverlässigkeit Obwohl dieser Geigerzähler keine Differenzierung der Strahlungsarten vornimmt, liefert er dennoch präzise Messwerte für die Gesamtstrahlungsintensität. Die Kalibrierung des Geräts ist benutzerfreundlich und ermöglicht eine schnelle Inbetriebnahme. Die Zuverlässigkeit des Geigerzählers wird durch regelmäßige Kalibrierung und Wartung gewährleistet, was besonders für Prepper von Bedeutung ist, die auf langfristige Einsatzbereitschaft angewiesen sind. Benutzerfreundlichkeit und Komfort Die Handhabung des Geigerzählers ist denkbar einfach gestaltet. Das Gerät lässt sich mit einer einzigen Hand bedienen, und die gut lesbare Anzeige sorgt dafür, dass auch bei schlechten Lichtverhältnissen die Messwerte problemlos abgelesen werden können. Die Akkulaufzeit ist beeindruckend, sodass das Gerät über längere Zeiträume hinweg ohne häufiges Aufladen genutzt werden kann – ein entscheidender Vorteil für Notfallsituationen und Langzeitüberwachungen. Preis-Leistungs-Verhältnis Einer der herausragenden Aspekte dieses Geigerzählers ist sein exzellentes Preis-Leistungs-Verhältnis. Im Vergleich zu teureren Modellen, die eine detaillierte Strahlungsanalyse und Differenzierung bieten, stellt dieses Gerät eine kosteneffiziente Alternative dar, die dennoch zuverlässige Ergebnisse liefert. Für Prepper und Interessierte, die eine grundlegende Strahlungsüberwachung ohne hohe Investitionskosten suchen, ist dieses Modell eine ideale Wahl. Anwendungsbereiche Der Geigerzähler eignet sich hervorragend für eine Vielzahl von Anwendungsbereichen: • Notfallvorsorge: Prepper können das Gerät in ihren Notfall-Kits integrieren, um bei radiologischen Notfällen schnell reagieren zu können. • Umweltüberwachung: Für Personen, die sich für Umweltfragen und Strahlungsschutz interessieren, bietet der Geigerzähler eine einfache Möglichkeit, die Strahlungswerte in der Umgebung zu überwachen. • Bildung und Forschung: Schulen und Bildungseinrichtungen können das Gerät für einfache Experimente und Demonstrationen im Bereich der Radioaktivität nutzen. • Industrie und Arbeitsschutz: Auch in bestimmten industriellen Anwendungen kann der Geigerzähler zur Überwachung der Strahlungsumgebung eingesetzt werden. Zubehör und Erweiterungsmöglichkeiten Das Gerät wird oft mit nützlichem Zubehör geliefert, wie zum Beispiel: • Tragekoffer: Ein robuster Koffer erleichtert den Transport und die Aufbewahrung des Geigerzählers. • Ersatzteile: Ersatzbatterien und zusätzliche Detektoren sind oft im Lieferumfang enthalten oder leicht erhältlich. • Bedienungsanleitung: Eine ausführliche Anleitung unterstützt den Benutzer bei der Inbetriebnahme und Wartung des Geräts. Kundenservice und Garantie Der Hersteller bietet einen zuverlässigen Kundenservice sowie eine angemessene Garantiezeit, die eventuelle Herstellungsfehler abdeckt. Der Support ist kompetent und hilfsbereit, was besonders wichtig ist, wenn Fragen zur Bedienung oder Kalibrierung des Geigerzählers auftreten. Die Garantiebedingungen sind transparent und bieten dem Käufer zusätzliche Sicherheit bei der Investition in das Gerät. Fazit Der Geigerzähler ohne Unterscheidung der einzelnen Strahlungsarten überzeugt durch sein hervorragendes Preis-Leistungs-Verhältnis und seine zuverlässige Funktionalität. Obwohl er keine detaillierte Strahlungsanalyse bietet, erfüllt er die grundlegenden Anforderungen an eine Strahlungsüberwachung und ist somit eine ausgezeichnete Wahl für Prepper, Umweltinteressierte und alle, die sich für Strahlungsschutz interessieren. Das robuste Design, die einfache Bedienung und die präzisen Messwerte machen dieses Gerät zu einem wertvollen Werkzeug für den täglichen Gebrauch und in Notfallsituationen. Insgesamt stellt dieser Geigerzähler eine kosteneffiziente und verlässliche Lösung dar, die alle wesentlichen Anforderungen an ein Strahlungsmessgerät erfüllt. Für diejenigen, die eine grundlegende, aber effektive Strahlungsüberwachung suchen, ist dieses Modell eine empfehlenswerte Investition, die sowohl Sicherheit als auch ein gutes Preis-Leistungs-Verhältnis bietet.
Q**Q
Mooi en goed product, uitgebreide mogelijkheden, USB aansluiting voor connectie met PC, oplaadbare accu. Zeker aan te raden.
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