The Air Ion Counter is a handheld meter designed to measure ion density– the number of ions per cubic centimeter (ions/cc) in air. It measures this number separately for positive and negative ions (+ and – ions are usually present simultaneously). This instrument is a true ion density meter, based on a Gerdien Tube (Gerdien Condenser) design, and it contains a fan which pulls air through the meter at a calibrated rate. The standard model measures up to 2 million ions/cc (for comparison, outdoor air typically has 100 to 1000 ions/cc, both + and -). The 2 million range is sufficient for almost all situations except for measuring very close to electric ionizers or strong radioactive sources. For these applications, models with ranges of 20 million and 200 million ions/cc are also available. (Range can be specified on the checkout page; all three ranges are $470.) AC Adapter included.
Analog Output Jack:
A plug can be inserted in the left side of the meter to monitor the output, which is a slowly-changing analog voltage. This is a stereo phone plug identical to the plug on small headphones in which the ground has been cut. An output of +1.999 volts (or -1.999) represents full-scale of the meter, regardless of which RANGE is selected.
AlphaLab also sells the USB-DL1 Datalogger which is great for streaming data from the AIC to a Windows PC.
Please note: solids do not produce ions unless there is an energy source (such as radioactivity, high voltage or heat above about 600° C). For example, neither tourmaline nor “diodes” produce any ions at room temperature unless radioactive material has been added. However, liquids evaporating can produce ions.
|SPECIFICATIONS: Air Ion Counter -10°C to 50°C, Wind Speeds < 15 km/hr (9 mph)|
|Range/Resolution1:||2 million / 10 (ions per cc) Range change is manual.|
|Accuracy2:||+/- 25% of reading|
|Noise:||10 ions/cc (2 second averaging)|
|Meter Size:||6.5 x 3.7 x 3.0 inches; 165.1 x 93.98 x 76.2 mm|
|Weight:||14.8 oz (420 g)|
|Battery:||9 volt alkaline (~ 8 hour life) at maximum drain/
“Low Battery” indicator (3 decimals pts.)