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Precision Air Quality Monitoring Low-Cost Sensors




Air Quality has become an integral part of any conversation when it comes to providing a healthy standard of living. With the increasing demand for knowing what particulate matter is in the air, partly due to COVID-19, increasing annual wildfires, and changing climate, Met One Instruments, Inc. offers an affordable product lineup that provides precision data. Equipped with this particulate data, one can make appropriate remediation decisions. As a world leader in reference monitoring samplers, you can count on Met One’s near-reference devices to provide the highest reliability and quality in localized data.



Met One Instruments offers a line of monitors and particle counters that sample ambient air for air quality indicators not restricted to federal, state, or local regulations. These supplemental monitors provide localized data to fill in regulatory monitoring gaps. Data supplied by NSIM monitors can be used to identify and track specific particulate sources, such as dust, smoke, or exhaust emissions that may be impacting the air quality in a particular area. Sense and respond with confidence with Met One’s Non-Regulatory Supplemental & Informational Monitors (NSIM).



Met One Instruments, Inc.’s optical mass monitors are low-cost, high-value portable devices used in applications where indicative-level accuracy and precision are acceptable and where external power is not always available. These instruments may be used to supplement government-operated, criteria-grade air quality monitoring networks to provide additional monitoring locations.  This can include places that cannot easily accommodate a fixed air quality monitoring station or one that does not currently exist, such as to support California AB 617. These instruments may also deploy as stand-alone devices for fenceline or emergency deployment monitoring applications.


The NSIM optical mass monitors offered by Met One Instruments, Inc. include:




Our criteria-approved air monitoring products sell worldwide. With this success came the development of Met One’s smaller, lower-cost air monitors. These are widely used as local area and industrial monitors. An essential requirement for these instruments is measurement stability—measurements made without temperature or long-term drift. Today’s measurement will reflect the same results as collected months before in a similar environment. When used with our CCS+ Comet Cloud Modem, remotely located instruments will provide data to your smartphone or computer within minutes.



Non-Regulatory Supplemental & Informational Monitors Products:

  • E-BAM - Met One Instruments

    E-BAM Portable Environmental Beta-Attenuation Mass Monitor

    The Met One Instruments E-BAM is in a class of its own as a portable, real-time beta gauge comparable to U.S. EPA methods for PM2.5 and PM10 particulate measurements. The E-BAM has been built to satisfy users, regulators, and those from...

  • E-Sampler Dual Ambient Monitor/Sampler

    Our E-SAMPLER is the most feature-packed light-scatter Aerosol Monitor available. Whatever your monitoring needs, the E-sampler will provide accurate, dependable and relevant data.

  • BC-1060 - Met One Instruments

    BC 1060 Portable Black Carbon Monitor

    Our BC-1060 portable black carbon monitor measures and reports black carbon concentrations, with user-selectable time resolution down to one minute, at both UV (370 nm) and IR (880 nm) illumination wavelengths. The combination of portability and dual-wavelength illumination permits rapid,...

  • AQ EAGLE Air Quality Monitoring System

    Met One Instruments, Inc. AQ EAGLE is a system utilizing our ES-405 Particulate Profiler. The ES-405 continuously samples ambient air and reports particulate mass concentrations simultaneously and in real-time for PM10, PM4, PM2.5, and PM1. Our ES-405 is ideal for...

  • ES-405

    ES-405 Simultaneous Particulate Profiler

    The ES-405 is a near reference air quality sensor designed to provide accurate real-time measurements of PM10, PM4, PM2.5, and PM1 particulate concentrations simultaneously. It reports these four key particulate concentrations in both indoor and outdoor environments. The rugged weatherproof...

  • ES-412

    NEW ES-412 Portable Simultaneous Particulate Profiler

    Introducing the newest addition to Met One Instruments, Inc. line of Localized Particulate Monitors, the ES-412 Portable Simultaneous Particulate Profiler. As a Near-FEM (Federal Equivalent Method) product, the ES-412 provides the quality and day-to-day stability consistent with EPA quality objectives....

  • C-12 Portable Carbon Monitor

      Carbon monitoring on a granular scale has never been more affordable, opening up an array of opportunities that were previously economically out of reach for many applications.   Introducing the GROUNDBREAKING Met One Instruments, Inc. C-12 Portable Carbon Monitor....

  • The ES-642 Remote Dust Monitor

    Remote Dust Monitor ES-642

    Met One Instruments’ ES-642 Remote Dust Monitor is an industrial air-quality sensor designed to provide real time particle concentration measurements in both indoor and outdoor environments. Our ES-642 measures particulate concentration using a highly sensitive forward scatter laser nephelometer, which...

  • Model 212 Ambient Particulate Profiler

    Ambient profiling of aerosol particulates has been simplified by the Met One Instruments, Inc. Model 212 Ambient Particulate Profiler. The 212 sizes and counts particles in eight digital bins and reports the information on command. Each of the eight channels...

  • Aerocet 831 Handheld Particle Counter - Met One Instruments

    Aerocet 831 Handheld Aerosol Mass Monitor

    The Aerocet 831 is a completely portable, full–featured, battery operated, handheld mass monitor. This device simultaneously provides five critical mass ranges (PM1, PM2.5, PM4, PM10 & TSP) in one minute from start up. Survey the environment with the easy to...

  • NPM 2 Network Particulate Monitor - Met One Instruments

    NPM 3 Network Particulate Monitor

    The Met One Instruments, Inc. NPM 3 is a forward light scatter laser nephelometer particulate monitor 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...

  • PARTAC Tactical Particulate Profiler

    Met One’s PARTAC Tactical Particulate Profiler (P/N 102686) is a robust size-selective particulate sampler used as an NBC agent alarm trigger, an ambient monitor for public and workplaces, and as a ground-truth reference for the verification of standoff particulate detectors....

  • AIO 2 Sonic Weather Sensor - Met One Instruments

    Weather Sensor AIO 2 Sonic

    The AIO 2 Sonic Weather Sensor is a complete, high performance weather sensor using Met One Instruments’ proven 2D sonic technology. This technology provides reference grade accuracy without moving parts and includes a built-in compass used for automatic magnetic north...

  • CCS COMET Cloud Service - Met One Instruments

    CCS COMET Cloud+ Service

    Met One Instruments’ COMET Cloud Plus+ (CCS) is a cellular modem and cloud data service package which is directly compatible with a variety of air quality and meteorological sensors. The CCS modem is available for 4G LTE Domestic and GSM/...

  • 905 Portable Tripod

    The model 905 Tripod is a lightweight, collapsible aluminum and stainless steel tripod designed for rapid deployment and retrieval. It can be easily transported and erected by a single person. The tripod is intended to support a complement of weather...

  • Swift 6.0 Air Flow Meter

    The Swift 6.0 is a multi-function Air Flow Meter specifically designed for accurate low rate measurements. The device’s easy-to-read display shows flow rate, flow temperature, and ambient pressure. Flow measurements are traceable to our NIST standard and certification is provided...

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