12 years instrument development manufacturer.

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Shenzhen Wanyi Technology Co., Ltd. comes here today with the great news that we have successfully developed Negative oxygen ion detector, radiation detector, nuclear radiation sensor probe, online water quality monitoring system, water quality monitoring sensor, gas detector, outdoor air quality monitoring system.It is a kind of new product made by state-of-the-art technologies. Continuous innovation ability is the fundamental guarantee of product quality. Shenzhen Wanyi Technology Co., Ltd. will keep focusing on customers' needs and keep up with the industry trends so as to develop Negative oxygen ion sensor that better satisfy customers. Our wish is to cover a wide range of global markets and win wider recognition from customers all over the world.

Warranty:1 yearCustomized support:OEM, ODM, OBM
Place of Origin:ShenzhenBrand Name:ONETEST
Product number:ONETEST-501S-||Measuring object:Air negative (oxygen) ion
Measuring principle:Flat Capacitance ElectrodeIon collection:68X69.5mm
Sampling device:25X10mmPolarization voltage:5V
Mobility:0.15,0.4,0.6cm²/V.sec can be customizedMeasuring range:10-19990 Pcs/cm³ 100-199900 Pcs/cm³Two gears
power supply:DC5VData output:USB (molbus-RTU protocol)

Product Description

      ONETEST-501S-II Air Negative (Oxygen) Ion Sensor is an economical anion sensor developed by Wanyi Technology for the measurement of anion concentration in indoor and outdoor ambient air. It is especially suitable for the measurement of material anions in the home improvement market and indoor air anion measurement. , Internet of Things integration and other fields, such as indoor air, negative ion coatings, plates, fabrics and other materials released negative ion concentration.

     The ONETEST-501S-II air negative (oxygen) ion sensor adopts the universal flat-plate capacitance electrode measurement principle, which has the characteristics of good oxidation resistance and rapid response. At the same time, the standard parts imported from Germany and the intelligent sampling fan are sampled, and the single-chip system is controlled, so that the instrument can get good stability and consistency! It is suitable for the measurement of negative ions in the environment and the assessment of ambient air quality! It is a good measurement tool for intelligent IoT monitoring, equipment integration, home decoration, green building materials, negative ion products, etc.!

Technical index

Measuring object Air negative (oxygen) ion Measuring principle Flat Capacitance Electrode
Ion collection 68X69.5mm Sampling device 25X10mm
Polarization voltage 5V Ion mobility 0.15,0.4,0.6cm²/V.sec can be customized
Measuring range

10-19990 Pcs/cm³ 

100-199900 Pcs/cm³

Two gears

power supply DC5v
Data output USB (molbus-RTU protocol) size Length 170 * height 44 * width 105 (mm)


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Packaging & Shipping

 Negative oxygen ion sensorNegative oxygen ion sensor

Company Information

     Shenzhen Kainafu Technology Co., Ltd. is a high-tech and environmentally friendly technology enterprise integrating R&D, sales, after-sales and technical consulting. Composed of 16 senior engineers with many years of market application experience and maintenance experience, Shenzhen Canafor Technology Co., Ltd. has passed ISO9001 and ISO14001 system certification, and has a number of patents such as water quality monitoring cloud platform software and system design.

Negative oxygen ion sensorNegative oxygen ion sensorNegative oxygen ion sensor


Our Services

* Standardized workshop and calibration process
* Professional quality inspection of 4-12 employees
* Fast delivery, free technical assistance
* Warranty 1 year


 What price can I get?

 We usually quote within 12 hours after receiving your inquiry. If you are very anxious to get the price, please let us know in your email so that we can contact and communicate in time.

 How can I get samples to check the quality of your products?

 fter confirming the price, you can request samples to check the quality of our products. As long as you can afford the express freight, we will provide you with samples.

What is your business scope?

 We mainly produce and sell air quality and water quality instruments, such as water quality sensors, water quality online monitoring equipment, air anion detectors, radiation detectors, gas detectors and some of our agents. Welcome to consult

What is your delivery time and warranty period?

Within 5-7 working days after payment is confirmed, customized products need to be discussed in detail, and the warranty period is one year



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Have a professional after-sales team to respond to you 24 hours a day. We are committed to producing the best quality products at the most competitive prices. Therefore, we sincerely invite all interested companies to contact us for more information.

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