description: kt-401 mini air ions tester negative oxygen anion concentration detector aeroanion meter the air anion tester is special design for measuring the concentration of positive and negative ions. Suit to measure negative ion generator, air purifier, negative ion hair dryer, air conditioning. ..And high concentration of the ion source, but it can' t be used to testing the negative oxygen ions from natural environment and leather, cloth, powder etc. Using methods: 1. Turn the switch to " on" position. 2. Keep your thumb in contact with the front square metal plates, then make the rear square metal towards the air anion generator. The closer to the air anion generator in test, the higher reading of the tester shows. 3. If it shows without symbols in reading, it means positive ions. or show " - ",it means negative ions. 4. Don' t touch the rear square metal of the tester in measuring, otherwise it would be inaccurate readings. 5. Before mesuring, keep the switch in " off " position. notes: this tester is a kind of high impedance tester, pay attention to avoid being affected by the damp when use and storage, or it may cause wrong reading and works unstable when testing, at tis time, you can use hair dryer to dy it or put in in the sun for several hours. specification: model: kt-401 lcd display: max reading 1999 measuring range: 1 x 104 --- 1999 x 104 (ions / cc) resolution: 1 x 104 (ions / cc) power source: 1.5v x 2lr44 button battery size: 8 x 3 x 1cm/3.15 x 1.18 x 0.39inch package includes: 1 x kt-401 air ions tester 4 x lr44 button battery details pictures:
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