COM3400W Atmospheric Ion Monitor
| Origin | Japan |
|---|---|
| Manufacturer Type | Authorized Distributor |
| Origin Category | Imported |
| Model | COM3400W |
| Pricing | Available Upon Request |
Overview
The COM3400W Atmospheric Ion Monitor is a precision-engineered instrument designed for quantitative measurement of unipolar and bipolar air ions in ambient environments. It operates on the principle of aspiration condenser-type ion collection, implementing the JIS B 9929 standard methodology—Japan’s nationally recognized protocol for atmospheric ion density determination. Its coaxial dual-cylinder electrode architecture ensures high electrostatic field uniformity and minimizes space charge distortion, enabling accurate discrimination and simultaneous quantification of both positive and negative ions across a wide dynamic range. Unlike single-polarity or diffusion-based sensors, the COM3400W incorporates adjustable ion mobility selection (0.16–5.0 cm²/V·s), allowing users to isolate and characterize small-ion populations—those with mobility >1.0 cm²/V·s—critical for evaluating natural air quality, indoor environmental hygiene, and biogenic ion effects in controlled settings such as cleanrooms, hospitals, and forest therapy zones.
Key Features
- Coaxial dual-cylinder collector design compliant with JIS B 9929 for trace-level ion detection and high reproducibility
- Simultaneous real-time measurement and display of both positive and negative ion concentrations
- Four selectable measurement ranges: ±0–8,000, ±0–50,000, ±0–500,000, and ±0–5,000,000 ions/cm³
- Adjustable ion mobility threshold (0.16–5.0 cm²/V·s) to differentiate small, intermediate, and large ion fractions
- Integrated environmental sensors: temperature (0–50.0 °C, ±1.0 °C accuracy) and relative humidity (5–95 %RH, ±5 %RH accuracy)
- LCD display with 16-character dual-line interface and backlight for low-light operation
- Onboard data storage supporting up to 900 measurement records with timestamping
- Analog output (dual-channel, 0–1 V) and digital communication via RS-232C or Ethernet (LAN) interface
Sample Compatibility & Compliance
The COM3400W is optimized for continuous or spot sampling of ambient air in both indoor and outdoor environments. Its aspiration flow path accommodates particulate-laden air without sensor fouling, provided inlet filters are maintained per operational guidelines. The instrument meets electromagnetic compatibility (EMC) requirements per IEC 61326-1 for laboratory and field use. While not certified for regulatory emissions reporting, its measurement traceability aligns with ISO/IEC 17025–accredited calibration practices when used with NIST-traceable ion generators. Data integrity supports GLP-compliant documentation workflows when paired with validated software logging.
Software & Data Management
The system ships with proprietary Windows-compatible analysis software (English-language version) that enables real-time visualization, time-series plotting, statistical summary (mean, SD, min/max), and export to CSV or Excel formats. The software supports configurable averaging intervals (1–600 s), mobility-filtered data segmentation, and overlay of concurrent temperature/humidity trends. Audit trails—including user login, parameter changes, and data export events—are logged internally and exportable for internal QA review. While not FDA 21 CFR Part 11–validated out-of-the-box, the software architecture permits integration into validated IT environments through documented configuration control and electronic signature add-ons.
Applications
- Environmental health studies assessing ion balance in urban, rural, and forested microclimates
- Indoor air quality (IAQ) assessment in healthcare facilities, schools, and office buildings
- Validation of ion-generating devices (e.g., HVAC-integrated ionizers, medical air purifiers)
- Research on atmospheric electricity, thunderstorm precursor monitoring, and aerosol–ion interaction dynamics
- Occupational hygiene evaluations where charged particle exposure may influence respiratory deposition efficiency
- Calibration reference for lower-cost ion counters requiring periodic cross-validation
FAQ
What ion mobility range does the COM3400W support, and why is mobility adjustment important?
The instrument allows continuous mobility tuning from 0.16 to 5.0 cm²/V·s. This enables selective detection of small ions—highly mobile species (<2 nm diameter) associated with natural air freshness—while excluding slower, cluster-ion interferences common in polluted or humid environments.
Does the COM3400W require routine calibration, and what standards are recommended?
Yes. Annual calibration against a certified radioactive ion source (e.g., ²⁴¹Am-based calibrator) or electrometer-traceable ion generator is recommended. Calibration certificates should reference ISO/IEC 17025–accredited laboratories.
Can the device operate unattended for long-term monitoring?
Yes—when powered continuously and connected to a host PC or data logger via RS-232C or LAN, it supports scheduled measurements and automated file archiving. Internal memory serves as backup during network interruption.
Is the analog output compatible with SCADA or building management systems (BMS)?
Yes. The dual 0–1 V outputs (positive/negative ion channels) are galvanically isolated and scalable to match standard 4–20 mA or 0–10 V BMS inputs using external signal conditioners.
What maintenance is required to ensure measurement stability?
Bi-weekly cleaning of the collector cylinder electrodes with isopropyl alcohol and lint-free swabs; quarterly verification of aspiration flow rate (±5 % of nominal 1.0 L/min); annual replacement of the inlet particulate filter (optional accessory).
