As buyers worldwide audit indoor air quality, one specification is moving from the laboratory into procurement checklists: ion balance. Leading atmosphere ion monitor providers are now expected to deliver instruments that separate positive and negative ion concentrations in real time, not a single vague total. The ONETEST-520 series dual-channel air ion detector from Wanyi Technology answers that requirement with two fully independent acquisition channels, a 4.3-inch color touch screen, and a coaxial cylinder electrode sensor engineered for stable sampling airflow and strong electromagnetic anti-interference performance.
PM2.5, temperature and humidity have dominated air quality discussions for a decade, yet the most dynamic indicator of environmental vitality is the concentration and balance of air ions. Positive and negative ions determine how "fresh" an environment really feels. Traditional single-channel detectors report an ambiguous aggregate; the ONETEST-520 captures the precise concentrations of both polarities simultaneously and independently, so users obtain the true ionic equilibrium state (n+/n- ratio), the instantaneous polarity change trend, and environmental insight that single-channel data simply cannot provide.
The instrument uses independent dual acquisition channels with high-performance condensing collectors, so positive and negative ion measurement never interferes with each other, even in complex electromagnetic environments. A one-piece formed metal housing and matching circuit design deliver outstanding electromagnetic shielding and physical durability, from the laboratory bench to the field site.
| Parameter | ONETEST-520 | ONETEST-520-A | ONETEST-520-B |
|---|---|---|---|
| Negative ion range | 0-1999x103 ion/cm3 (auto range) | 0-1999x104 ion/cm3 | 0-1999x105 ion/cm3 |
| Positive ion range | 0-1999x103 ion/cm3 (auto range) | 0-1999x104 ion/cm3 | 0-1999x105 ion/cm3 |
| Temperature | -40 to 80 ℃ | ||
| Humidity | 0-100 %RH | ||
| Atmospheric pressure | 300-1100 hPa | ||
| Data logging | Yes, 60,000 data sets | ||
| Zero adjustment | Manual and automatic (XP mode) | ||
| Display | 4.3-inch color touch screen, adjustable backlight | ||
| Output | RS232, configurable address, baud rate and data interval | ||
| Power | AC 220V / DC 12V 1A plus built-in 18650 battery pack (3C certified) | ||
| Weight | 2.210 kg (base + sampling tube) | ||
| Minimum order quantity | 1 piece |
|---|---|
| Payment terms | T/T |
| Supply ability | 300 pieces per month |
| Delivery time | 5-15 working days |
| Packaging | Plastic box inner packaging, carton transport packaging |
| Brand / model | ONETEST / ONETEST-520, Shenzhen, China |
For distributors, environmental laboratories, cleanroom contractors and air treatment manufacturers, the decisive question is not only what an instrument measures but how consistently it does so over years of service. The ONETEST-520 combines dual-channel accuracy, JIS-draft aligned methodology, RS232 integration for PLC and wireless transmission, and the support of a dedicated PC analysis suite. Buyers sourcing through established atmosphere ion monitor providers can request a single-unit sample, verify performance against their own reference conditions, and scale to monthly volumes with 5-15 working day lead times.