Description
The Met One Instruments NPM 3 particulate monitor is a forward light scatter laser nephelometer which automatically measures real-time airborne TSP, PM10, or PM2.5 particulate concentration levels. The NPM 3 features improved reliability and lower maintenance. Each unit uses a serial cable that allows the device to connect to a laptop, data logger, or CCS+ Comet Cloud Modem, where the real-time data is accessible for display, logging, review, and reporting instantly or at a later time. The monitor contains a 5-mW diode laser operating at 670nm wavelength.
A protective optical housing fully encapsulates the laser beam and optics system within the device. Data from the NPM 3 can be managed using the supplied copy of Met One’s user-friendly, Windows-based, Comet™ communications terminal software. Comet allows the user to view real-time data and log data to a data file on a computer in .csv format.
The NPM 3 is calibrated using 0.6μm NIST traceable polyspheres. These provide a critical and consistent baseline calibration. To correlate this calibration to real-world, non-spherical particulates, a Calibration Factor (K-Factor) is established by means of comparison to a collocated, trusted, and proven reference source (i.e., a BAM 1020) to ensure both accuracy and correlation. The initial K Factor is established at the originating site. If the local particulate source changes, the K Factor may require readjustment. The unit is supplied with a TSP head, Comet software, mounting bracket, and hose clamp.
Key Features
- TSP, PM10, PM2.5 and PM1 measurements (TSP comes standard, the others are options)
- Particulate concentration by forward light scatter laser nephelometer
- 0 to 100mg/m3 (100,000ug/m3) measurement range
- Rapid deployment
- CCS+ Comet Cloud Plus compatible
- Cloud data available on any smart device
- Cost effective for network integration
- Ideal for neighborhood monitoring, smart city and IoT applications
- .0001 measurement sensitivity
- 2.0 liter per minute flow rate
- Automatic zero calibration
- Built-in heated inlet
- 4-20mA and 0 to 10 VDC analogue output
- 11 to 40 VDC at 1.5 amp maximum power consumption
- 350mA power consumption (heater off) and 1.1 amp with heater on at 15 VDC
- RS485 and RS232 communications
- Relay contact for alarm output
- Wall, pole or tripod mounted
- 0 to 50 deg C operating temperature
- Can be powered by mains, battery or solar panels
Applications
- Building Automation
- Environmental Clean Up Sites
- Air Pollution Level Monitoring
- Dust Level Warning Systems
- Military Applications
- Surface Emissions Modeling
- HVAC Control
- Industrial Hygiene
