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Registered Member #96
Joined: Thu Feb 09 2006, 05:37PM
Location: CI, Earth
Posts: 4059
I wonder if there is a market for a pen sized dosimeter that logs X-ray and other ionising radiation using 3 channel (Geiger, fluoro and alpha) sensors and then synchronises with your wi-fi etc or Bluetooth phone.. Have it charged via wifi too just for fun.
Registered Member #311
Joined: Sun Mar 12 2006, 08:28PM
Location:
Posts: 253
Conundrum wrote ...
I wonder if there is a market for a pen sized dosimeter that logs X-ray and other ionising radiation using 3 channel (Geiger, fluoro and alpha) sensors and then synchronises with your wi-fi etc or Bluetooth phone.. Have it charged via wifi too just for fun.
You can't charge anything from wifi. ISTR someone came out with a scam product a few years ago but it was clearly fake.
Registered Member #96
Joined: Thu Feb 09 2006, 05:37PM
Location: CI, Earth
Posts: 4059
You sure about that? Its very very low power, a typical GM tube draws in the microamps which is less than the self discharge on a NiMH coin cell.
I've heard that the small ceramic antennas can be paired with active rectification ie low Vds MOSFET arranged as a bridge and extract substantial power.
Registered Member #2099
Joined: Wed Apr 29 2009, 12:22AM
Location: Los Altos, California
Posts: 1715
Here's one from Mumbai for about the same money: US $451 or GBP £292, free shipping. Says "CE approved" (does that imply CE marked?) and AERB approved.
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Chinese ebay dental x-ray units unsafe - what a surprise!
