Sensors

I am planning to launch a sounding balloon and I am exploring the world of sensors for an onboard computer.

  1. What are the best and low cost ozone sensors?
  2. Are they any cosmic ray detector?

Are they any cosmic ray detector?

It is simple to make one. Just take two GM tubes (Geiger Muller) that normally detect gamma radiation. If you gate these so that you only get an output pulse when both tubes simultaneously detect a ray, then that is a cosmic ray if you are in the atmosphere.

This seems pretty low-cost. Dunno about "best"? http://www.futurlec.com/Gas_Sensors.shtml Ozone (O3) Sensor - Detects and measures Ozone (03) Concentration from 10ppb to 2ppm. Ideal for monitoring air quality or for use in environment and research experiments. Part Code: MQ131 $ 12.90

Unless I did not read correctly, they seems not working at -60 Celcius (-40 C would be correct).

It is simple to make one. Just take two GM tubes (Geiger Muller) that normally detect gamma radiation. If you gate these so that you only get an output pulse when both tubes simultaneously detect a ray, then that is a cosmic ray if you are in the atmosphere.

Interesting but detecting is only partly the point. I would like taking measure and storing the data and then compare with the altitude and position.

they seems not working at -60 Celcius

Most electronics stops working at 0C, so the trick is to heat the system to stop it getting that low.

I would like taking measure and storing the data and then compare with the altitude and position.

Yes that’s where the arduino comes in with an SD card for storage.

It is simple to make one. Just take two GM tubes (Geiger Muller) that normally detect gamma radiation. If you gate these so that you only get an output pulse when both tubes simultaneously detect a ray, then that is a cosmic ray if you are in the atmosphere.

But will you be able to take measure or just detect there is or not cosmic ray?

Do you have some sample on Internet?

Do you have some sample on Internet?

http://www.electronickits.com/kit/complete/meas/vek2645.htm http://store.qkits.com/moreinfo.cfm/K2645 http://www.imagesco.com/geiger/geiger-counter-kits.html

But will you be able to take measure or just detect there is or not cosmic ray?

What do you mean by a measurement? Detecting it IS making a measurement. It is not a gamma ray spectrum analyser if that’s what you mean by measurements, for that you will need something like a scintillation counter; way above pocket money prices.

You don’t get cosmic rays in the atmosphere anyway, what you get is the shower of particles caused by the cosmic ray. So there is not a lot to measure.

Arduino Geiger Counter here . . . http://brohogan.blogspot.com/search/label/Geiger%20Counter It would be easy to add another tube and AND the outputs.