Hacker News Reader

Is there a maximum level to the measurement? Asking for a friend… “3.6 roentgen. Not great, not terrible.”

I am not certain but this tube looks like an M4011 which typically measures up to 1 mSv/hr for a reference Cs-137 source. Pretty low maximum level, not suitable for emergencies.

Why did I see graphite on the roof?

Reply on news.ycombinator.com