Air Negative Ion Detector Manufacturer Introduces the ONETEST-502XP-Ⅱ for Small Particle Ion Measurement

As a specialized air negative ion detector manufacturer, ONETEST has released the ONETEST-502XP-Ⅱ air negative ion tester, a field-ready instrument engineered to measure the small particle positive and negative ions that occur naturally in ambient air, as well as the high concentration negative ions generated by negative ion generators and finished anion products. Instead of leaving operators with a raw count alone, the instrument converts every reading into a clear 1–6 air freshness grade, so buyers, testing laboratories and production lines can judge air quality with a single, repeatable measurement.

Why small particle ion measurement matters

Most consumer-grade detectors only respond to large, easy-to-catch ions. Ecological small particle ions — the fraction with a mobility around 0.6 cm²/V·s — are the ones that actually reflect how air behaves in a real room, an office, a vehicle cabin or a factory workshop. By resolving this smaller particle range, the ONETEST-502XP-Ⅱ gives negative ion generator manufacturers, air purifier brands and third-party inspection bodies a verification tool that matches what end users genuinely feel and what certification schemes actually ask for.

Core design advantages

• Coaxial cylinder capacitance sensor — stable sampling airflow, uniform ion distribution measurement and strong anti-interference ability in the same compact chamber.
• Dual-polarity measurement — positive and negative ions are both captured, with simple gear switching between modes.
• Three-in-one environmental readout — ion concentration, temperature and relative humidity are displayed together.
• Oxidized aluminium housing — a special oxidation process delivers strong environmental adaptability for outdoor and workshop use.
• LED display with mean and maximum values — the 10-second average and the peak reading are shown simultaneously for fast, confident judgement.
• Long-duration field power — a built-in 8000 mAh battery pack plus a DC12V adapter supports all-day outdoor measurement.
• Optional RS232 output — connect to a data management platform or the ion.onetestinc.com cloud monitoring service for remote supervision and data transmission anytime, anywhere.

Technical specifications

Air freshness grading built into every reading

Air freshness is often judged by suspended particle counts, but negative oxygen ion concentration is a more direct and more professional indicator. When ambient negative oxygen ions reach roughly 1000–1500 ions/cm³, the air is considered clean. The ONETEST-502XP-Ⅱ therefore reports a freshness grade on the following scale:

Typical applications

• Quality control and outgoing inspection for negative ion generator and air purifier manufacturers
• R&D verification of anion release performance in home appliances, textiles and decorative materials
• Indoor air quality assessment for offices, schools, hospitals, hotels and vehicle cabins
• Environmental monitoring in parks, forests, scenic areas and ecological research projects
• Third-party testing laboratories and certification preparation work

Packaging, delivery and supply

Each set is delivered in a protective portable case containing the host machine, charger, cleaning cotton swab, instruction manual, calibration report, ground wire, qualification certificate and warranty card; a tripod is available as an option. Product packaging uses an aluminium case with an outer carton for shipment. Minimum order quantity is 1 piece, payment terms are T/T, supply ability is 500 pieces per month and delivery takes 5–15 working days.

Working with the manufacturer

ONETEST supplies the ONETEST-502XP-Ⅱ worldwide to distributors, instrumentation traders, OEM brands and testing institutions. Buyers searching for a dependable Air negative ion detector manufacturer can request the full specification sheet, calibration report samples, CE / CMA / CNAS documentation and OEM branding options directly from the factory, together with volume pricing for multi-unit orders.