burko Geiger Counter, Assembled DIY Geiger Counter Kit Module Nuclear Radiation Detector LCD Display with Sound and Light Alarm Function

Plug it and  you can directly measured nuclear radiation.
Specifications:
Geiger tube parameters:
Technical parameters diameter: ?10±0.5mm
Total length: 90±2mm
Starting voltage: < 350V
Recommended operating voltage: 380V
Minimum plateau length: 80V
Maximum plateau slope: 10%/80V
Extreme operating voltage: 550V
The maximum count rate: 25 times / min
Medium temperature: -40 ~ 55 ?
Item size: 118 * 63mm / 4.6 * 2.5in
Package size: 130 * 80 * 50mm / 5.1 * 3.1 * 2.0in
Package weight: 166g / 5.9ounce
Packing List:
1 * Assembled Radiation Detector System