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Air Ion Counter Tester NKMH-103 (Bi-polar/Ultra wide range)
P/N: NKMH-103
US$996.44
FREE Shipping · No extra customs charges (local taxes excluded)
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In stock. Ship in 3 days
Technical Supervisor & Quality Assurance
Masaharu Nemoto · Ion Trading (Universal Plan Co., Ltd.)
✓Made in Japan. With 30+ years verifying our products, I personally check the performance and technical details shown on this page.
2-Year Warranty
We repair the product or replace it with a new one. All products are covered for two years.
Delivery by DHL/FedEx
US/SG 1-3 · Asia 1-5 · EU 2-5 · AU/NZ 2-5 · Others 2-6 days (just FYI)
Product Summary
- This ion counter measures positive/negative ions simultaneously.
- There are very few products which measure both ions simultaneously in this price range.
- It has an ultra wide measurement range of 100-19,990,000 (pcs/cc).
- It is good for R/D & Product Promotion.
- This lightweight counter weighs approx. 770g, so it is easy to carry around and great for outdoor use.
- It is easy to operate because no complicated setting is required before measurement.
- It outputs DC analog voltage, which allows you to remotely monitor the ion count.
| Accuracy | Low to mid |
| Measurement range | 10 - 19,990,000 (pcs/cc) |
| Detectable ion | Positive/Negative small air ions (measures simultaneously) |
| Measurement method | Parallel flat plates method |
| Runs on | Dry battery or AC |
| Weight | approx. 770g |
| PC connectable | No |
| Applications | High-performance ion generators, Ion dryer etc. *Not good for low density ions. |
| The NKMH-103 is not good for low density ions. The NT-C101A is available to measure ions in the range of 0-10,000 (pcs/cc). |
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Usable worldwide!
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Play time: 0:34/No sound with subtitles
Customer Reviews
Reviewed on 2025-03-15
I use it every day, as it makes good product development possible.
Reason(s) why I purchased from you: A 2-year warranty.
Detailed review: It is doing as well as I expected. I use it every day, as it makes good product development possible. I thought it would be even better if there were a yearly calibration
Detailed review: It is doing as well as I expected. I use it every day, as it makes good product development possible. I thought it would be even better if there were a yearly calibration
Reviewed on 2016-08-26
I can use it to develop new products.
Reason(s) why I purchased from you: I compared prices with others.
I am happy because: I can use it to develop new products which emit negative ions. I have not got used to using this product yet. I hope I will be able to make use of it.
I am happy because: I can use it to develop new products which emit negative ions. I have not got used to using this product yet. I hope I will be able to make use of it.
Reviewed on 2017-12-27
I received the product earlier than expected as you kindly shipped it the day I ordered. Thank you.
I am happy because: I started to promote a negative ion generator named Waterfall Breeze Ion Medic. We considered purchasing an ion counter because we wanted to measure ion counts around the demo unit, which is installed in our shop, and to show the
Reviewed on 2018-07-17
This product is easier to use and it displays readings more clearly than the counter I used to use.
Reason(s) why I purchased from you: Your price is good.
I am happy because: I do maintenance work for ion/plasma/environmental equipment as I work in the industry. I measure ions after the maintenance work. This product is easier to use and it
I am happy because: I do maintenance work for ion/plasma/environmental equipment as I work in the industry. I measure ions after the maintenance work. This product is easier to use and it
Reviewed on 2014-01-24
It is very easy to operate. This small and lightweight device is good for outdoor use.
It is very easy to operate. This small and lightweight device is good for outdoor use. You offered great service. Thank you for recommending this product which meets my requirements when I contacted you.
Reviewed on 2024-01-27
Your prompt shipment allowed me to use it right away.
Reason(s) why I purchased from you: You offer prompt shipment.
Detailed review: You offer prompt shipment. I wanted to use it ASAP. (Thank you for including a sample air purifier. I was so glad.)
Detailed review: You offer prompt shipment. I wanted to use it ASAP. (Thank you for including a sample air purifier. I was so glad.)
Customer Reviews
Air Ion Counter Tester NKMH-103 (Bi-polar/Ultra wide range)
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- Product Summary
- Demonstration Video
- How to Use
- Measures Positive/Negative Ions Simultaneously, Wide Range, Good for R/D & Product Promotion
- Lightweight and Compact Body, Runs on a Battery or AC
- DC Analog Output
- Photos of Actual Measurements
- Package Contents
- Part Names & View of the NKMH-103
- Q & A
- Specifications
How to Use
No complicated setting is required. You just turn on the ion counter, select the measurement range and place the measuerment sample close to the air intake part. It takes only 30 seconds to start to measure ions. The image below shows 1800/800 (pcs/cc) of negative/positive ions are detected.
Measurement range: You can manually select the measurement range from 199,900/1,999,900/19,990,000 (pcs/cc). For more details, please see the instruction manual.
Zero adjustment: No zero adjustment is required. The counter is automatically calibrated.
Measures Positive/Negative Ions Simultaneously, Wide Range, Good for R/D & Product Promotion
✔ Measures Positive/Negative Ions Simultaneously
The NKMH-103 is an affordable ion counter yet measures positive/negative ions simultaneously.
Unlike other ion counters in this price range, you do not need to switch to the positive <-> negative ion measurement mode. This model simultaneously measures both ions and displays the ion counts on the LCD display.
✔ Measures up to 19,990,000 (pcs/cc), Ultra Wide Range
The NKMH-103 measures 100-19,990,000 (pcs/cc). There are very few ion counters which can measure over 10,000,000 (pcs/cc).
This ion counter is good for measurement of 2,000-300,000 (pcs/cc) ions emitted from negative ion products up to over 10,000,000 (pcs/cc) ions generated by high-performance ion generators.
| The NKMH-103 is not good for low density ions. The NT-C101A is available to measure ions in the range of 0-10,000 (pcs/cc). |
✔ Good for R/D & Product Promotion
It is good for R/D & product promotion as it clearly shows the ion count.
Lightweight and Compact Body, Runs on a Battery or AC
✔ Lightweight and Compact Body
This product weighs 770g (including the battery), so it is easy to carry around. Ion tester good for outdoor use!
✔ Runs on a Battery or AC
This ion counter runs on x 006P dry battery or 100-240VAC/50-60Hz via the AC adapter. You can use it in most countries.
DC Analog Output
You can use the cable, which is included in the package, to connect a DC voltage meter or digital multimeter to the ion counter. DC voltage, which is in proportion to the ion count *1 *2, is extracted from the counter. This allows you to remotely monitor the ion count. You do not need to stay close to the counter during the measurement!
*1 1mV/1digit
*2 +/-1V is outputted when the reading is +/-1000.
For more details: Q & A How can I use the DC analog output jack?
Photos of Actual Measurements
* The readings shown on the LCD display are not exact measurement results.
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Package Contents
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Part Names & View of the NKMH-103
| Front side panel |
| Left side panel |
| Right side panel |
| Back side panel |
| View of the NKMH-103 |
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Q & A
| Q & A: Ion counter |
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(1) How long do I have to wait after I turn on the counter? You have to wait 30 seconds. No complicated setting or calibration is required before measurement.(2) Do I have to perform zero adjustment before measurement? No, you do not. The counter is automatically calibrated.(3) What is the ideal distance between the detector and the sample? There is not an ideal distance. However, the ion count detected by the counter can be lower than it actually is when the sample is too far away from the counter. 10mm +/- will be fine. Please be sure that the sample never makes contact with the detector.(4) Can I select a measurement range for positive ions and another range for negative ions? You cannot select different measurement ranges for positive and negative ions. They are simultaneously measured within the same range.(5) Do I have to wait 30 seconds after I change the measurement range? We suggest you should do so because it provides more accurate measurement.(6) Can I store the ion data in the counter? No, you cannot.(7) Can I measure ion densities in water? No, you can't. This ion counter is for air ions.(8) What is the lowest ion density this counter can measure? It is 100 (pcs/cc).(9) Do I need to adjust or calibrate the detector? No, you do not need to.(10) Does this counter require grounding? We suggest you should ground it because it provides more accurate measurement.(11) I cannot find a measurement tolerance in the specs. Why? This is because there is no official standard to measure air ions and the tolerance. Measurement tolerances can be found in specs of products supplied by other companies but they can be theoretically calculated values.(12) Do you have a users manual written in other languages? We only have English and Japanese versions.(13) Can I transfer the DC output signals to my PC? No, you cannot. It can cause failure of both the PC/counter. You can use the cable to connect a DC voltage meter or digital mulitmeter to the counter. (14) How can I use the DC analog output jack?
You can connect a DC voltage meter or digital multimeter to the ion counter by using the cable, which is included in the package.e.g.   (15) Can I use this ion counter in my country? I think the voltage and AC plug are different from Japan. You can use the NKMH-103 in most countries as it works with AC100-240V and comes with the AC plug adaptors for the countries.   |
| Q & A: Maintenance work |
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(1) Does the ion counter require calibration? If it does, how often does it need to be calibrated? It depends on your usage and ambient conditions but we suggest it should be calibrated once a year. We can calibrate your counter. You can feel free to contact us.(2) How much/long will it cost/take for calibration work? It will cost 225USD+/- depending on the exchange rate and will take a week or two. We will contact you to give you a quote if the counter needs calibration work.(3) Can I clean up the detector by myself? If I can, how can I do that? Yes, you can. |
| Q & A: Others |
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(1) Does this counter come with a warranty? We offer 2 years warranty.(2) Can I return the counter? We accept returns within 8 days of delivery.(3) Do you offer a rental service? No, we do not. |
Specifications
| P/N: NKMH-103 | |
| Product name | Air Ion Counter Tester NKMH-103 (Bi-polar/Ultra wide range) |
| Detectable ion | Positive/Negative small air ions |
| Measurement method | Parallel flat plates method |
| Mobility | 1.0 (cm2/Vs) |
| Air flow rate | 1000 (cm3/s) |
| Dimensions | W180xH40xD95 (mm) (projections not included) |
| Weight | Approx. 770g (battery included) |
| Internal power supply |
1x 006P 9V dry battery * (runs approx. 3 hours continuously)
*alkali recommended |
| External power supply | AC adaptor 100-240VAC (50/60Hz) |
| Display | 3.5 digit LCD |
| Measurement range |
100-19,990,000 (pcs/cc).
102 range: 100-199,900(pcs/cc) 103 range: 1,000-1,999,000(pcs/cc) 104 range: 10,000-19,990,000(pcs/cc) |
| Minimum detectable ion density | 100 (pcs/cc) |
| DC analog output | ±1999mV (1mV/1digit) |
| Operating temperature range | -10C - 40C (14F - 104F) |
| Operating humidity range | 70% R.H. or below (no condensation) |
| Storage temperature range | -20C - 70C (-4F - 158F) |
| Storage humidity range | 70% R.H. or below (no condensation) |
| Interface | DC analog output |
| Manufactured by | Hokuto Electronics,inc. |
| Made in |
Japan 
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| Categories of Air Ion Counter Tester |
 General Purpose
 Highly Accurate
 For Ores
 PC Connectable
 Wide Range
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Back to Air Ion Counter Tester top
| Related categories of Air Ion Counter Tester NKMH-103 (Bi-polar/Ultra wide range) |
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Ion Trading
Universal Plan Co., Ltd.
107 Tachikawa-Lumiere, 3-5-1, Ichiban-cho, Tachikawa-city, Tokyo, 190-0033, Japan
Phone: +81-42-848-5311 Fax: +81-42-848-5148
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| Copyright (C) Universal Plan Co., Ltd. 1993-2026 Japanese Corporate Number: 1012802002452 (National Tax Agency Japan) |