Ambient Air Monitors
Particles Plus® Model 11000
Ambient Air Monitor
The Particles Plus® 11000 Ambient Air Quality Monitor is engineered for high-resolution, real-time measurement of ambient particulate matter in outdoor environments. Housed in a NEMA 4 weatherproof enclosure, the 11000 series measures particle sizes from 0.3 to 25.0 μm across 30 discrete size channels at a flow rate of 1.2 LPM. Designed for demanding outdoor applications such as roadside monitoring, urban air studies, industrial fence-line monitoring, and environmental research, the 11000 combines rugged durability with industry-leading sensitivity and resolution.
As the first real-time optical particle counter to offer 30 accurate size channels at higher concentrations, the 11000 records size-specific particle data into a 65,000-record non-volatile memory that is critical for applications requiring research-grade particle sizing.
Data can be simultaneously communicated to a remote monitoring system, logged locally, exported as .CSV, and analyzed via the free Particles Plus® software. The system includes remote diagnostics and multiple communication protocols for seamless integration into smart city infrastructure, environmental monitoring networks, and public health initiatives. Whether deployed as a standalone unit or as part of a distributed sensor array, the 11000 delivers best-in-class performance for ultrafine and coarse particle monitoring.
| Airborne Pollution and Environmental Research |
| Perimeter or Fence-line Monitoring for Construction, Remediation or Hazardous Waste Sites |
| Mine and Quarry Fence-line Monitoring for dust control operations |
| City Wide or Community Air Pollution Monitoring |
| Roadside Emissions Monitoring |
| Medical Facilities Property Monitoring |
| Power Line Wild-Fire Monitoring |
| Environmental Disasters |
| Monitor for 24 hours a day, 7 days a week, 365 days a year |
| • Measures up to 30 particle size channels simultaneously |
| • Approximates mass concentration in μg/m³ with density and refractive index corrections |
| • User selectable PM sizes from 0.3 μm to 10 μm including TPM of up to 25.0 μm |
| • Long-life laser diode technology for reliable performance |
| • Inlet sample humidty and enclosure temperature regulation for precise particle sizing |
| • Stores up to 65,000 sample records, 1,000 locations, and 50 sampling recipes |
| • Resolve issues quickly from any location with internet-enabled remote diagnostics |
| • ULTRAGUARD® Fiberglass reinforced polyester NEMA 4 tamper-proof enclosure |
| • Optional pole or tripod mount options |
| • 2 Year Limited Warranty (Extended and Lifetime Warranties available) |
| Model | 11000 |
| Size Range | 0.3 to 25 μm |
| Size Channels | Factory calibrated at 0.3, 0.5, 1.0, 2.5, 5.0, 10.0 μm |
| Flow rates / Accuracy | 1.2 LPM ±3% |
| Concentration Limits | 27,000,000 particles/ft3 @ 10% coincidence (per ISO 21501-4), |
| 50,000,000 particles/ft3 @ 10% coincidence (as tested and validated1) | |
| Aerosol Concentration Range | 0.01 to 20,000 μg/m³ |
| Light Source | Long life laser diode |
| Resolution | 0.00003 μg/m3 |
| Zero Stability | No appreciable drift |
| Count Modes | Particles/second, Real-Time Meter, cumulative/diff. (count/m³ and count/ft³) and mass concentration (PM) |
| Log Interval | Minimum 1 second with no hold time, maximum 99 hours |
| Calibration | NIST traceable |
| Vacuum Source | Internal pump with automatic flow control |
| Number of Channels | Up to 30 channels |
| Custom Size Channels | Calibration for custom size channels available |
| Communication Modes | ModBus over RS485 or USB direct (USB to IMS-9K software utility) |
| Optional Communication Modes | Wi-Fi, LoRaWAN and Ethernet |
| Environmental Sensor | Temperature and relative humidity probe: -4º to 122ºF (-20º to 50ºC) ±1ºF (0.5ºC), 0 -100% ± 2%RH |
| Alarm | Alarms for all particle values, environmental sensors, flow and sensor failure |
| Calibration | Particle sensor recommended once per year |
| User Calibration | Field Calibration of Temperature and Humidity possible with included utility software |
| External Surface | ULTRAGUARD® Fiberglass reinforced polyester - compression molded SMC box and Cover |
| Enclosure | Temperature controlled ventilation blower and heated backplate for environmental extremes |
| Dimensions (L x W x H) | 5.5 x 8.4 x 21 in (13.9 x 21.3 x 53.3 cm) includes barb fittings |
| Weight | 6.7 lbs. (3.0 kg) |
| Accessories | Quick start guide, operating manual on USB flash drive, mounting feet |
| Optional Accessories | Printed manual, data cable, pole mounting hardware kit |
| Data Storage | Internal 65,000 sample records (rotating buffer) including particle count data and environmental data |
| Sample Time | 1 second to 99 hours |
| Power | 110 to 240 VAC 50/60 Hz universal in-line power supply |
| Operating Conditions | -4º to 122ºF (-20º to 50ºC) / 20% to 95% non-condensing |
| Warranty | 2 year Limited Warranty (Extended and Lifetime warranties available) |
