GQ Geiger Counter GMC-800 Nuclear Radiation Detector American Design US National Standard Dosimeter with Global Data Logger & Sharing Beta Gamma X-Ray Portable Device

Di facile utilizzo, il menù è molto semplice non servono le istruzioni. Funzionamento molto stabile non oscillano i valori , naturalmente bisogna appoggiare e lasciarlo fermo. Illuminazione di vari colori, fantastica, suono molto bello con volume. Grafici e interfacciabile con pc. Batteria ricaricabile. È piccolo e molto leggero, unica accortezza non farlo cadere! Ad essere pignoli avrei messo un laccetto di sicurezza, che in qualche modo metterò.

Ta bueno

Cool gadget to have around to learn about natural radiation and impress your friends. I'm sure it could be a life saver if all H3II breaks loose and something really bad happens, but hopefully I'll never have to put that to the test. It feels well made and is easy enough to use without having any experience. If it makes a lot of noise, then stop being where you are and go somewhere that doesn't make it sq*uawk:-). It's small and portable, you can keep it in your kitchen drawer or glove box. I can't say how accurate it is as I don't have a nuclear reactor to compare it to, but it does register different levels near different things, so I think it's working. For home use, I'm guessing perfect accuracy is less important than an on/off get out of this area alert should something big happen.

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.

Very good product