Ion Stick(TM) expensive

Very handy to have this, (What's this?) This little device is great I weeded out devices that work and ones that don't put out negative ions, it's easy to use just keep your thumb on the front metal part and don't touch the back metal part to get a good read move it around the air you ar testing slowly.
expensive, (What's this?) The product work like advertised,is a tester to see if you have or not ions around you,I don't know how exact is the measurement ,but look like a very chiep toy,and after I ordered it,I saw it on ebay with half price(50 USD).I think the normal price is much lower.So I made a bad deal.

low cost, use over and over

very small and light weight

Range: 1 x 10^4 to 1,999 x 10^7 (ions/cm³)

measures + and - ions in air

simple to operate

low cost, use over and over.very small and light weight.Range: 1 x 10^4 to 1,999 x 10^7 (ions/cm³).measures + and - ions in air.simple to operate. Budget Air Ion Tester

This has got to be the simplest and lowest cost way to measure Air Ions. Very easy to use and so small it's barely bigger than a finger. Especially good for testing ion generators and air purifiers which claim to produce ions.