Monnit ALTA Wireless Air Quality PM Sensor
Measures particulate matter PM₁, PM₂.₅ and PM₁₀ with wireless logging.
Manufacturer: Monnit Corporation
Original Product Family Details
Monnit ALTA / gateways documentation →
Wireless range, power source, frequency region, gateways and calibration options vary by exact part number.
Manufacturer SKU and safety check
Manufacturer’s example US 900 MHz line-powered ALTA PM sensor MNS2-9-W2-AQ-P25A-LPO monitors PM1, PM2.5, and PM10. This product photograph represents a specific housing; alternative supply and frequencies differ.
Original Monnit SKU information, datasheets and order options →
ALTA PM — wireless telemetry versus optical inlet maintenance
The Monnit ALTA wireless air quality particle monitor measures PM1, PM2.5 and PM10 with region- and power-specific housing versions. The maker’s pictured MNS2-9-W2-AQ-P25A-LPO is a US-band, line-powered example rather than a universal SKU. Choose a local radio/gateway configuration, reporting interval and sample location independent of optical particle calibration. Cloud link loss should not be treated as zero PM; maintain a plan for inlet contamination and sensor diagnostics.
ALTA PM — laser-scattering dust sampling and particle-size bins
| Parameter | Manufacturer fact | Selection/QA significance |
|---|---|---|
| Particle measurement method | A small internal fan draws ambient air across a laser light-scattering optical chamber | Dust intake, cleaning and humidity can dominate the installed-system accuracy. |
| Reported channels | PM1, PM2.5 and PM10 displayed as distinct particulate channels | These values refer to aerodynamic particle size classes; PM1 is not PM1 ppm gas and PM2.5 is not CO₂. |
| Reported size bins | Manufacturer guide lists PM1 0.3–1 µm, PM2.5 1–2.5 µm and PM10 2.5–10 µm in classification explanation | These sizes do NOT specify a concentration range in µg/m³, and cumulative PM1/PM2.5/PM10 channels should not be added as independent mass fractions without data-model confirmation. |
| Threshold controls | Separate PM1.0, PM2.5 and PM10 thresholds, optional full data display in iMonnit | Ensure selected app view does not hide PM1/PM10 under PM2.5-only default. |
| Connectivity and diagnostics | Device cycles inlet fan at measurement start and sends data through gateway | Radio loss, blocked intake or dirty optics must trigger maintenance and not be interpreted as zero particle concentration. |
Radio, calibration and safety boundary
Check exact radio region, gateway compatibility, the delivered maker part number, firmware and calibration revision. A radio/cloud alert is not an independently certified hazardous-area instrument or hardwired emergency alarm, unless the exact installed system and approval evidence explicitly demonstrate it.
Official Monnit sources: Monnit ALTA air quality PM configuration and methodology.