Terry. How come the AlphaLab says air sampling 800 cm/sec, where the refurbished says 200 cm/sec?
http://www.trifield.com/ion_detector.htm "AlphaLab, Inc.'s Air Ion Counter is a substantial improvement over previously available ion meters, and it can make ion measurement available to anyone. It costs less than any other air ion meter and is smaller and easier to use, requiring only one 9V battery. Despite this, it has the same sensitivity (down to 10 ions per cubic centimeter) of very expensive meters. Due to full electrostatic shielding and a fan throughput of 800 cubic centimeters/sec., it can make accurate readings even in adverse conditions such as gusty winds or strong electrostatic fields."" "The Air Ion Counter can be used for the detection of natural and artificial ions. Natural ions include those generated from the decay of radioactive minerals and radon gas; ions generated by fires, lightning, and evaporating water; and ions associated with storm activity. Note that in fair weather at sea level, typical ion counts are about 300 to 800 negative and 400 to 1000 positive ions per cubic centimeter. Before a storm, positive ions increase dramatically. During a storm, negative ions increase." Besides, I'm a bit leary about anything coming from New York State. :-) Frederick > [Original Message] > From: Terry Blanton <[EMAIL PROTECTED]> > To: <[email protected]> > Date: 6/16/05 9:54:41 AM > Subject: Re: Electrospray Ionization (ESI) > > > From: "Frederick Sparber" > > > BTW. If you want to buy a good Ion Counter,to get some answers, I'll be happy to > > contribute $100.00 US toward it's estimated $600.00 price tag. > > Here's a refurbished one for $400: > > http://www.lessemf.com/unique.html > > (bottom of page).
