I have built a gas detector using a conventional gas sensor (similar to Figaro sensors). I want to calibrate it. I'd use a container of a known size and place a drop of petrol into it. I would heat it in warm water, letting the droplet slowly evaporate. Voila - an atmosphere of patrol vapour.My question is, how do I calculate the strength of the vapour, in say parts per million (ppm)?Calibrating the container volume is easy, using various kitchen measures. Measure the volume you want in water and pour it into a larger container. Mark the level, and empty the container. We have a known volume. A calbrated syringe also gives odd but accurate volumes.The petrol can also be measured using a small syringe.I am aware the atmosphere in the container would need to be stirred, as the vapour is heavier than air and would settle.What however is the formula (ae) required to calculate the concentration? Alternatively, what do I do to measure a concentration of 10 PPM?
use HALON 211. the canister-handy type is okey for office use.. this can extinguish quickly and not messy as dry chemical type. And you can pass-by a FIREMANS HOUSE, just for reality check, rest assured they will tell you and recommend on this particular.
You can eat resin aswell, give it about 10 or 15 minutes and you'll feel it start kicking in at the bottom of your stomach. Supposed to have stronger effects than smoking it too, personally I'd just buy some green.. lol
