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 .)
The rechargeable battery system (Lithium Ion battery at full charge
runs six hours at maximum drain, recharges in three hours, has 500-1000
charge cycles of life).
Both the AC adapter and the charger for the
rechargeable system operate from 250 VAC (50 to 60 Hz), and either can
power the meter directly.
If the AC adapter is ordered, it disconnects the
internal battery when plugged in, and it does not recharge the batteries.
Air Ion Counter Operation:
Air is sucked in at the top (photo), is measured, and exits at the
The display shows the ion count within 2 seconds
and it continues to display the ion density in the air, showing any
changes within 2 seconds after they occur.
The POLARITY switch determines whether + or - ion
density is displayed. (In the photo, negative ion density is being
To conserve power, the switch on the right side
can be flipped to STANDBY; this turns the fan off and stops the
A rotary offset control fine-tunes the internal
amplifier so the display reads zero if no ions are present (or whenever
the meter is on STANDBY).
No adjustment of this is needed unless the
temperature changes significantly.
An analog output jack is present, which is useful
for long-term automated monitoring.
The meter uses a standard 9 volt battery, but an
AC adapter and a rechargeable battery system are two options.
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
However, liquids evaporating can produce ions.