Insight into the "Vitality" of Air: A Dual Channel Air Ion Detector Sets a New Benchmark

For years the air quality conversation has revolved around PM2.5, temperature and humidity, while the most dynamic element in the air has been largely overlooked: air ions. Their concentration and balance decide whether an environment feels fresh and alive or stale and heavy. Shenzhen Wanyi Technology has now released the ONETEST-520 series, a dual channel air ion detector engineered to decode that hidden signal. It is not only about concentration, but about balance.

Why "Dual Channel" Changes Everything

Traditional single-ion instruments return one vague combined figure. The ONETEST-520 captures the precise concentrations of positive and negative ions simultaneously, independently and in real time, which means users can obtain:

• True ionic equilibrium — the n+/n− ratio as two separate, trustworthy readings
• Real-time polarity trends — instant visibility of how polarity shifts over time
• Interference-free sampling — independent dual acquisition channels and high-performance condensing collectors mean the two measurements never contaminate each other, even in complex electromagnetic environments

Core Features at a Glance

1. Coaxial cylinder electrode sensor — stable sampling airflow, uniform ion distribution measurement and strong anti-interference ability; accurate measurement of small natural ions as well as high-concentration negative ions produced by ion generators.
2. Rugged one-piece metal housing — outstanding electromagnetic shielding and physical durability, from the laboratory bench to the field site.
3. 4.3-inch colour touch screen — draws dual-channel concentration curves in real time, with one-click data export for reports and deeper analysis.
4. Long endurance — built-in 18650 lithium battery pack (3C certified) plus AC 220V / DC 12V 1A adapter for tens of hours of continuous outdoor monitoring.
5. Multi-parameter correlation — positive and negative ions measured together with atmospheric pressure, temperature and humidity, plus ECO freshness grading (levels 1–6) and the FCL forest air ion assessment model.
6. 60,000 data set logging and dedicated PC software for export, analysis and report generation; optional ion.onetestinc.com cloud platform and APP monitoring for remote transmission anytime, anywhere.
7. RS232 output with configurable address, baud rate and data interval for PLC or wireless transmission and remote measurement and control.
8. Standards-oriented design — aligned with the international JIS draft together with national, group and enterprise measurement standards.
9. Bilingual, one-click operation — built-in Chinese and English menus, simultaneous average and maximum value display, manual and automatic zeroing (XP online mode).

Technical Specifications

An ion evaluation model is built in: a value greater than 0.5 indicates clean air, while a value below 0.5 indicates polluted air.

Where the ONETEST-520 Is Deployed

• Scientific research and environmental monitoring — assessment of negative oxygen ion resources in forests, waterfalls and coastal areas.
• Atmospheric electricity — research on ion changes in atmospheric electric fields and special meteorological phenomena such as lightning and sandstorms.
• Industrial quality and electrostatic control — precise calibration of ionisation balance in cleanrooms, safeguarding yield in semiconductor and pharmaceutical production.
• Equipment verification — performance validation and periodic calibration of ion fans and static eliminators.
• Healthy buildings and consumer goods — diagnosis of "sick building" symptoms, quantification of indoor ion environments and authoritative evaluation of air purifiers and plasma generators.
• Precision agriculture and smart buildings — ion ecological regulation research and active indoor environment control systems.

Availability and Service

The ONETEST-520 series ships from Shenzhen with a minimum order quantity of one piece, T/T payment terms, a supply ability of 300 pieces per month and delivery within 5–15 working days.

About Shenzhen Wanyi Technology Co., Ltd.

Founded in 2011 in Guangming District, Shenzhen, Wanyi Technology believes that understanding the environment leads to a healthy new life. With 70%–80% of output exported, the company designs and manufactures air ion instruments for research institutes and industrial quality teams.