Overview
The GQ GMC-800 digital Geiger Muller Counter is specially designed to be a U.S. NRC compliant, portable
and convenient device. It can be used in industrial, commercial maintenance, research, evaluation,
simulation and other analytical or scientific applications in areas such as industrial plants, public utilities,
hospitals, universities, laboratories, and electronic repair shops. 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 for
both indoor and outdoor environments. It features automatic data recording, continually monitoring the
radiation level and logging the data into internal memory every second. Users can check and analyze this
data by connecting the GMC-800 to a computer and downloading with provided software. The GQ GMC-
800 also comes with a high-quality color LCD Module, the friendly designed graphic user interface is fully
utilized the color LCD. The device has one front LED indicator.
The device is equipped with a Type-C USB port, utilized for communication and external power
supply/charging of the internal rechargeable Li-Ion 3.6V/3.7V battery.
The GQ GMC-800 rechargeable battery can be charged with a standard wall adapter. Using the adapters,
continuous data monitoring is possible. The GMC-800 can run on only the wall adapter, giving users
freedom from the limitations of a battery and guaranteeing consistent and accurate measurements.
The main board also has a real time clock on board for time related data logging purposes.
The USB port communicates with the GQ Geiger Counter Data Viewer software.
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.
Specifications:
Range of dose rate indications, µSv/h 0.00 to 2000
Range of exposure dose rate indications,mRem/h 0.00 to 200
Range of registered beta radiation energy MeV 0.25 to 3.5
Range of gamma radiation energy, MeV 0.1 to 1.25
Range of registered X-ray radiation energy MeV 0.03 to 3.0
Reproducibility of indication 20%
Gamma Sensitivity Co
60
(cps/mR/hr) 22
Alarm levels by CPM 0 to 999999 (continuously)
Alarm levels by uSv/h 0.00 to 9999 (continuously)
Alarm levels by mRm/h 0.00 to 999 (continuously)
Date indication YYYY-MM-DD (continuously)
Time indication HH-MM-SS (continuously)
Elapsed time indication 99 years(maximum)
Radiation detection: , x
Detectable Radiation Range: 0.1 ~ 3 MeV
Instrument Background: 0-2 pulses/s
Working Voltage: 3.6-3.7V
Display: Color LCD dot matrix, back lighted
On board Memory: 2M Bytes flash memory for data storage
Power: Consumption 25mW – 125mW (count rate dependent)
Power: Supply 3.7V Li-Ion battery / USB power
This device is calibrated to GQ Electronics’ strict QA standard and eligible to be calibrated to U.S. Nuclear
Regulatory Commission (NRC) regulation 10-CFR-34,10-CFR-35, ANSI/NCSL Z540.3-2006(R2013),
ISO/IEC 17025:2017(E),MIL-I-45208A, and traceable to the National Institute of Standards and Technology.
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