The present invention relates to the field of the detection, analysis and/or determination of matter or particles suspended in fluid. In one particular form, the present invention relates to smoke detectors, which detect unwanted pyrolysis or combustion of material. In another form, the present invention...http://www.google.es/patents/US7724367?utm_source=gb-gplus-sharePatente US7724367 - Particle monitors and method(s) therefor
