GQ Geiger Counter Selection Guide  
Hardware
  GMC-300E
+V4
GMC-320
+V4
GMC-320
+V5
GMC-500 GMC-500+
Ready-To-Use Yes Yes Yes Yes Yes
On Board CPU Yes Yes Yes Yes Yes
Geiger Tube Installed  One One One One Two
LCD Display Size 128x32 128x32 128x32 128x64 128x64
Onboard Speaker Yes Yes Yes Yes Yes
Battery Included Yes Yes Yes Yes Yes
Battery Type 3.7V Li-Ion 3.7V Li-Ion 3.7V Li-Ion 3.7V Li-Ion 3.7V Li-Ion
Battery Size AA(14500) AA(14500) AA(14500) 18650 18650
LED Indicator Yes Yes Yes Yes Yes
Audio Data Port Yes Yes Yes Yes Yes
USB Data Port Yes Yes Yes Yes Yes
Mini USB Cable Yes Yes Yes Yes Yes
Internal Flash Memory 64 KB 1 MB 1MB 1MB 1MB
Internal Data Logger Yes Yes Yes Yes Yes
Real-Time Clock Yes Yes Yes Yes Yes
Electronic Gyroscope   Yes Yes Yes Yes
Temperature Sensor   Yes Yes Yes Yes
WiFi Module      Yes Yes Yes
On Board
Feature Expand Socket
      Yes Yes
Battery type selectable
(Charge or Not)
Yes (by software) (by software) (by software) (by software)
Installed Software/Firmware Main Features
  GMC-300E
+V4
GMC-320
+V4
GMC-320
+V5
GMC-500 GMC-500+
Maximum CPM 65535 65535 65535 655350 982980
Maximum uSv/h 328 328 328 4250 42500
Maximum mR/h 32.8 32.8 32.8 425 4250
Back Light Level Control Yes Yes Yes Yes Yes
Timed Count Yes Yes Yes Yes Yes
Treshhold Data Logging   Yes Yes Yes Yes
LCD Contrast Control Yes Yes Yes Yes Yes
History Data Save  Yes Yes Yes Yes Yes
History Data User Erase Yes Yes Yes Yes Yes
View history data on unit Yes Yes   Yes Yes
View history data with PC software Yes Yes Yes Yes Yes
Cumulative measurment total count user reset Yes Yes Yes Yes Yes
Speaker On/Off countrol Yes Yes Yes Yes Yes
LED  On/Off countrol Yes Yes Yes Yes Yes
Battery type selectable
(Charge or Not)
Yes Yes Yes Yes Yes
WiFi data logging      Yes Yes Yes
Customized  data internet  logging server      Yes Yes Yes
Vertical Reading Display       Yes Yes
Cumulative Dose Display       Yes Yes
Others
  GMC-300E
+V4
GMC-320
+V4
GMC-320
+V5
GMC-500 GMC-500+
Data Viewer/logger
Software For Windows
Included Included Included Included Included
Data Logger PRO
Software For Windows
Optional Optional Optional Optional Optional
Online
Forum Technical Support
Yes Yes Yes Yes Yes