Geiger Counter- Radiation Detector

Geiger Counter- Radiation Detector
Geiger Counter- Radiation Detector Geiger Counter- Radiation Detector Geiger Counter- Radiation Detector Geiger Counter- Radiation Detector Geiger Counter- Radiation Detector
Product Code: GMC-300
Reward Points: 0
Availability: In Stock
Price: $249.00
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The GQ GMC-300 digital Geiger Muller Counter is designed to be a portable and convenient device to measure radiation levels. The device comes with built-in audible and visual signals for the level of radiation detected. It can be used for radiation detection, monitoring in door, out door and other similar environment. It features an auto data recorder that can continually monitoring the radiation and log the reading each second data into the internal memory. When it is connected with the PC software, the radiation history data can be downloaded to the computer and the user is able to perform an analysis of the collected data.

The device is equipped with a USB port for both USB communication and external power supply/charger.

The GQ GMC-300 has installed a high capacity rechargeable battery. With the power adapter, the battery can be charged while the data continually monitored so that you will never worry about the battery and lost data.

The main board also has a real-time clock for all time related data logging.

The USB port communicates with GQ soft Geiger counter software and the history data viewer software. 

The GQ data viewer software can download the history data in the unit and save it on the computer for future reference.


  • Radiation detection: Beta and Gamma .
  • Sensitivity to Gamma Radiation: 0.1~1 MeV
  • Own Background: 0,2 Pulses/s
  • Working Voltage: 6~9V
  • LCD Display: Dot matrix with back light
  • Working power: 0.045W - 0.2W
  • Power: 9V battery / USB power

The following CPM data is measured by GMC-300:

Source CPM reading
Background 20~40
Public park granite table 50~83
Uranium glass bead 238U 320
Uranium ore 238U 2905
Standard 5uCi radioactive source 26500


Main features:

  • Small,portable hand-held
  • Audio and visual indication for nuclear radiation detection. 
  • Dot matrix LCD digital display model with back light.
  • USB Data port for connection with computer/PC/laptop GQ Soft Geiger Counter software
  • Battery charging feature for charging internal battery.
  • USB DC input port for external power input, so that continually monitoring becomes possible.
  • Powerful conter circuit is capable for handling counting up to 65,535 CPM (Count Per Minute).
  • Highly sensitivity tube M4011 installed
  • built-in battery charging circuit
  • On-board real-time clock
  • On-board flash memory for history data record
  • on-board speaker.
  • Dimension: 5'x2.85'x1' 
  • 9V battery or DC power adapter operation
  • Text mode provides maximum data information. eg. CPM, Date, Time, Elapsed time, uSv/h, mR/h etc.
  • Real-time graphic mode provide visualized real-time radiation changes, so that it is much easier to observe the data changes. It also displays the CPM rate at the same time. In Graphic mode, the ZOOM feature lets user see from lowest to highest graph onscreen. 
  • Back light Control to set the back light ON,OFF or timeout to save power.
  • Battery charging and battery level indicator.
  • Speaker ON/OFF control.
  • Alarm setting sets the alarm ON/OFF, alarm type, alarm level.
  • Date time sets the real-time clock.
  • Swivel display setting. Auto 180 degree swivel display provides a convenience reading when unit is upside down.
  • Three points calibration. For CPM to uSv/h and mR/h conversion
  • Power saving mode lets unit keep running at minimum power.
  • Data saving mode selection lets the unit record data every second/minute/hour. Up to 7 days history data
  • History data searching
  • and more....

Package include items:

  • GQ GMC-300.
  • USB cable
  • DC power wall adapter/chager
  • DC power car adapter/chager
  • Quick start guide
  • Download link for SoftGeigerCounter and USB driver for Windows XP/Vista/Win7 32 and 64 bits


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