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Originally Posted by Mike(Mont)
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Hi Mike(Mont),
The only air ion meter I see on that page is the Alpha Lab Standard 2 million ions/cm3 version. This meter works by sucking an air sample in and measuring ions, then displaying the ion count in ions per cc of air (or other gas). The range selections are to 2 million, 20 million, and 200 million ions/cc.
http://www.trifield.com/content/air-ion-counter/
We also see in the instructions it has a 20-foot ground cord to connect to earth ground before allowing the meter to stabilize for positive or negative ion reading of one of the three ion density scales. Then the fan is switched on in the sampling mode which draws an air sample in the top, and discharges it out the bottom during the measuring operation.
http://www.trifield.com/content/AIC-Instructions/
This seems a bit more sophisticated than the home-built ion detectors I read about that are built around a high impedance amplifier connected to an antenna that is pointed in the direction of suspected ions.
I presume it also gives ion readings that are more accurate.
Two questions that come to mind are:
1. What readings did you see in ions/cc, from minimum to maximum when you found the peak while tuning your loop antenna?
2. Were the ions you measured positive or negative?
Best wishes,
J_P