We are now experiencing Fukushima radioactive plume. It is time to get this monitoring instrument. 

This item is a brand new & newly designed digital Geiger Counter/Data recorder GQ GMC-300E Plus set.

Real-time Graphic, Text and Large Font mode (with the latest firmware)

(Record radiation data and Play it back later)

This is ready to go set. Everything included. No adjustment needed.
Place it anywhere and then read the data.

The GQ GMC-300E Plus is a newer model of GMC-300 series Geiger Counter. Compared with the previous model, the GMC-300E Plus improved overall quality. It installed a high contrast black/white LCD module, added a front LED indicator and an audio data port. The audio data port can be directly connected to any third party device application as data input, such as the iPad.
Difference between GMCS: 'GQ Geiger Counter Selection Guide'
Some pictures here may be taken from a GMC-300 model, but GMC-300E Plus has the same features on it.

It is designed to be a portable and convenient device. The device comes with built-in audible and visual signals for the level of radiation detected. It can be used for radiation detection and monitoring both indoor and outdoor, as well as in other similar environments. It features automatic data recording. It can continually monitor the radiation and log the data each second into internal memory. When connected to a PC, the software can download the radiation history data to the computer and the user is able to analyze those data later.

The device is equipped with a USB port, utilized for communication and external power supply/charging of the internal rechargeable NiMH battery.

The GQ GMC-300E Plus internal rechargeable battery can be charged with a wall adapter or with a car adapter for the cigarette lighter. If using the adapters, continuous data monitoring is possible. Using either power adapter you will not have to worry about the batteries charge condition or any data loss.

The mainboard also has a real-time clock on board for time-related data logging purposes.

The USB port communicates with the GQ GMC-300 Soft Geiger Counter software and the GQ Geiger Counter Data Viewer software.

The GQ GMC-300 Soft Geiger Counter software’s appearance is an exact copy of the GMC-300 hardware human interface. You can download it for free and experience the GMC-300 user interface before you purchase the real hardware.

The GQ Geiger Counter Data Viewer software can download the time stamped radiation (history) data from the unit and save it on a computer for future references and analysis.

For professional data logging of radiation data, the GQ Geiger Counter Data Viewer(Logger) may be downloaded for free. An even more advanced version, the GQ Geiger Counter Data Logger PRO software may be purchased at low cost from GQ Electronics LLC.

The GQ data viewer software also can be used as a real-time data monitor. the user is able to save the real-time data into Excel .csv text format, HTML file format etc.

GQ GMC-300 provides open GQ RFC1201 communication protocol for easier system integration. See the software download section for a detailed protocol.

Specification:

• Radiation detection: Beta, Gamma and X-Ray .
• Sensitivity to Gamma Radiation: 0.1~1 MeV
• Own Background: 0,2 Pulses/s
• Working Voltage: 3.2-4.0V
• LCD Display: Dot matrix with back light
• Working power: 0.045W - 0.2W
• Power: 3.7V battery / USB power

The following CPM data is measured by GMC-300:

Click here to see 'GQ Geiger Counter Selection Guide'
The following pictures here may be taken from a GMC-300, but GMC-300E Plus has the same features on it.