MNS2-9-W2-AQ-P25A-LPO Monnit Alta Wireless Line Powered PM2.5 Particulate Matter Sensors

 Supported Applications

The Omega Alta wireless PM2.5 um meter measures Particulate Matter (PM) Concentration, specifically monitoring PM1, PM2.5, and PM10 levels in ambient air. The device draws in air via a small fan and utilizes laser scattering to determine particle number and size based on concentration. It is designed for enterprise IoT applications where long-range wireless communication and extended battery life are required.

The sensor transmits measurements directly to the iMonnit online monitoring system, which supports configuration, data viewing, and alerts via SMS and email. The series features over-the-air updates and enhanced power management capabilities.

Operating Conditions & Performance

The Alta-Particle series operates within specific temperature ranges dependent on the battery type selected:

• Commercial version (Alkaline Batteries): -18°C to 55°C (0°F to 130°F)
• Commercial version (Lithium Battery): -40°C to 85°C (-40°F to 185°F)
• Industrial version (Industrial Battery): -40°C to 85°C (-40°F to +185°F)

The device functions in ambient humidity from 0 to 99%. Storage temperature is rated for -40 to 80 C. The effective measurement range covers 0 to 500 ug/m^3, with a maximum range of 0 to 1000 ug/m^3.

Accuracy specifications are defined by concentration levels:

• +/- 10% @ 100 to 500 g/m^3
• +/- 10 ug/m^3 @ 0 to 100 ug/m^3

Response time is approximately ~10 Seconds, though this may vary with stability threshold settings and PM concentration. Higher concentrations allow the sensor to acquire stable readings more quickly.

Configuration Options

The series supports multiple wireless transmission frequencies depending on regional requirements:

• 900 MHz: Frequency-Hopping Spread Spectrum (FCC ID: ZTL-G2SC1 and IC: 9794A-G2SC1)
• 868 MHz and 433 MHz: Frequency-Agile Wireless

The device offers a wireless range of 1,200+ ft non-line-of-sight. Security is provided via Encrypt-RF® (256-bit key exchange and AES-128 CTR). Power supply requirements are 2.0–3.8 VDC (3.0–3.8 VDC using power supply), with a note that hardware cannot withstand negative voltage.

Physical dimensions for the unit are:

• Height: 2.256
• Length: 4.880
• Width: 4.134
• Weight: 3.7 ounces

The sensor includes integrated memory capable of storing up to 3200 sensor messages.

Key Product Differences

Variation within the series is primarily defined by battery chemistry and operating temperature envelopes:

• Commercial version with Alkaline Batteries: Limited to -18°C to 55°C (0°F to 130°F).
• Commercial version with Lithium Battery: Extended range of -40°C to 85°C (-40°F to 185°F).
• Industrial version with Industrial Battery: Matches the extended industrial temperature range of -40°C to 85°C (-40°F to +185°F).

The series is certified for FCC, CE, and Industry Canada. The 868 and 433 MHz products are tested and found to comply with EN 300 220-2 V3.1.1 (2017-02) and EN 60950.

Installation requires the intake slits to point down to prevent dust or moisture accumulation, ensuring no obstructions within 1 inch from the slits. The device must not be used in corrosive gas, volatile/flammable gas, dusty conditions, low/high-pressure environments, wet locations, places with salt water/oils/solvents, or areas with strong vibrations.