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Actual negative and positive ion measurements featured in literature and media

Home > Theory > Actual negative and positive ion measurements featured in literature and media
Here is a summary of actual negative and positive ion measurements featured in literature and media.
Please note:
  1. The unit is pcs/cc.
  2. "-" shows no data.
  3. 1,000 or more is shown in bold.

1. Health science of negative ions / Noboru Yamanoi

Measurement location Negative ion Positive ion
Mountain 700+ -
Shinjuku Kabukicho, Tokyo (Outside) - 157
Fountain (Shinjuku, Tokyo) 780 -
Business district (Windy weather) 380 -
Inside office - 550+
10m away from the basin of a waterfall 4730 -
Forest 1800 -

2. Secrets of negative ions / Akiko Sugahara

Measurement location Negative ion Positive ion
Forest 2000 1000
Inside office 0 500
Windy office (window opened) 380 -
10m away from a waterfall (Sunny weather, Humidity 40-60%) 2800 -
Busy street (Sunny weather, Humidity 40-60%) 1800 2700
Industrial district (Sunny weather, Humidity 40-60%) 500 2000
Room of an apartment (Sunny weather, Humidity 40-60%) 1500 2200
Room made of wood (Sunny weather, Humidity 40-60%) 2100 1400
Beside a window during a lightning storm 3000+ +
Karaoke room 5 5
Game arcade 30 40
Riverside (Tokyo) 270 120
Park (Windy weather) 1000 500

3. Splendid tourmaline healthy life / Ryuzo Nagai

Measurement location Negative ion Positive ion
Forest 1000 -
Around the basin of a waterfall 1500 -

4. Travel in the sky / The negative ion research association

Measurement location Negative ion Positive ion
Nihonbashi, Tokyo (Outside) 68 175
Office in Tokyo (Daytime average) 34 270
30F office room in Tokyo 28 140
10F room of an apartment in Tokyo 96 135
Mountain in Nagano 115 140
Room in an Ibaragi farming district (Daytime average) 215 230
Tochigi Nasu plateau 692 670
Offshore in the Pacific Ocean 830 495

5. Negative ions save our planet / Noboru Horiguchi

Measurement location Negative ion Positive ion
10m away from a waterfall 12000 1800
Riverside forest 2800 1700
Busy roadway 1800 2700
Industrial district 500 2000
RC building 1500 2200
Building which has mud walls and/or is made of wood 2100 1400

6. Ion revolution in the body / Noboru Yamanoi

Measurement location Negative ion Positive ion
On a lawn 109 -
Under a tree 207 -
Room equipped with a TV, VCR, audio equipment and air conditioner - 56
Kitchen - 130
Blow off point of an ion air purifier 80000 -
Room equipped with an air conditioner which electronically emits negative ions (center of the 26.4m2 room) 2000-5000 -
 
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