Tin oxide cathode, coaxial cylindrical thinshell structure (wall density of 50±10cg/cm2), pulse applied type halogen tube.
Support provide the detection γ-Ray of 20mR/h-120mR/h and soft β-Ray in r-ange of 100-1800 decay/minutes·CM2.
The ambient medium temperature is from -40°C to 55°C.
Easy installation, it can be installed on the geiger counter without need tools.
Comes with one PVC tube for convenient transmission.

A perfect replacement accessory for IOT-GM-v1.1 IOT open-source geiger counter GM-tube.
Name: J305 Geiger GM-Tube
Working temperature: -40℃ to 55℃
Minimum plateau length: 80V
Max plateau slope rate: 10%/80V
limiting operating voltage: 550V
Max background count rate: 25 times/min
Colour:transparent
Material:Glass

Package Contents:
1 x J305 Geiger Muller tube