Models 5301-AQM1 and 5301-AQM2 Indoor Air Quality Monitors

Part Number: RM-5301AQM Brand: Particles Plus, Inc

Model 5301-AQM1 Air Quality Monitor

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The Particles Plus® 5301-AQM1 and 5301-AQM2 Remote Air Quality Monitor measures and displays particle mass concentrations for PM1, PM2.5, PM5 and PM10 including temperature, relative humidity, CO2 and TVOC in the 5301-AQM2.

This wall-mounted instrument is the most versatile remote air quality monitor available for fixed installations.

The advanced power management and the industry’s first sleep mode, allows for long intervals between samples over extended and unattended operations.

The AQM Series can easily integrate into a building automation and facility monitoring system via Ethernet, USB or optional Wireless 802.11 b/g, RS485 or RS232.

The 5301-AQM1 and 5301-AQM2 report and display 6 user-selectable particle size channels, as well as Carbon Dioxide: CO2, temperature, and relative humidity.

The instrument monitors PM1, PM 2.5, PM5, PM 10 and any other PM size value the user specifies with an easy-to-use Channel Management control panel.

The instrument also monitors flow, sensor status, date of last calibration, serial number, laser on-time, and date of manufacture for easy maintenance and warranty management.

The remote monitor operates using a long-life internal 0.1 CFM pump.

View data and generate environmental reports real-time on screen, via printer or USB key, through the versatile output options, or export to Particles Plus® Instrument Management Software during monitoring system or network failure.

Particles Plus® instruments can be controlled and monitored remotely via web browser from any PC, tablet or smartphone supporting up to 20 concurrent user sessions.

The 5301-AQM1 and 5301-AQM2 particle counter stores 45,000 time-stamped particle count and environmental data records for redundant protection in the event of a monitoring system or network failure.

The AQM Series mass concentration mode approximates density in μg/m³ and PM - particle matter allowing for density and refractive index corrections to ensure accuracy.

All Particles Plus® counters meet ISO 21501-4 and JIS B9921.

These instruments ensure compliance with an on-board pulse height analyzer.
  • Measures 0.3 μm to 25 μm
  • 0.1 CFM - 2.83 LPM Flow Rate
  • Large Easy-to-use Icon Driven Color Touch Screen Display
  • Approximates Mass Concentration in μg/m3 and Indicates Simultaneous PM Values
  • User-selectable, Adjustable Particle Channel Sizes
  • 5301-AQM1 Measures CO2, Temperature, and Humidity. The 5301-AQM2 includes TVOC.
  • Stores Up to 45,000 Sample Records
  • Connect Using Ethernet, USB or Optional Wireless 802.11 b/g, RS485 or RS232
  • Static or Dynamic IP Address - DHCP Connects to a Local Network or the Internet
  • Seamless Integration Into a Facility Monitoring System with MODBUS RTU, ASCII or TCP
  • Internet of Things JSON Output Allows for Cloud Based Data Storage and Retrieval
  • Included Software Permits Remote Operations, Data Management, Diagnostics and More
  • Displays and Externally Prints Information with Optional Printer
  • Internal Audible Alarm with User Selectable Thresholds for All Environmental Parameters
  • Easy Configuration and Transferable from Instrument to Instrument
  • User Friendly Field Calibration with Single or Dual Point Offsets for All Sensors
  • Remote Diagnostics Allows for Remote Service Investigation Through the Internet
  • Long Life Laser Diode Technology
  • Lightweight Stainless Steel Enclosure
  • 2 Year Limited Warranty, Extended Warranties Available


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 variable binning

Flow Rate / Accuracy

  • 0.1 CFM (2.83 LPM) / ± 3 %

Aerosol Concentration Range

  • 0.01 to 20,000 μg/m³

Light Source

  • Long life laser diode


  • .00003 μg/m³

Zero Stability

  • No appreciable drift

Count Modes

  • Real-Time Meter and graph, cumulative/differential count/m³ and count/ft³, and mass concentration - PM

Log Interval

  • Minimum 1 second with no hold time, Max. 99 hours


  • NIST traceable


  • 4.3” (10.9 cm) WQVGA (480x272) color touch screen


  • Optional
  • External thermal printer available

Internal Vacuum Pump

  • Internal pump with automatic flow control

Filtered Exhaust

  • Internal HEPA filter

Number of Channels

  • 6 Calibration for custom size channels available

Custom Size Channels

  • Calibration for custom size channels available

Audible Alarm

  • Adjustable built-in alarm

Communication Modes

  • Ethernet
  • USB
  • Optional Wireless 802.11 b/g
  • RS-485 or RS-232

Environmental Sensors for 5301-AQM

  • Includes NDIR CO₂ (0-5000 ppm, resolution 1 ppm, accuracy ± 1 % FS, Response rate 20 seconds), temperature and relative humidity probe 32º to 122ºF (0º to 50ºC) ± 1° F (0.5ºC), 15-90 % ± 2 % RH

Environmental Sensors for 5302-AQM

  • Includes all sensors in the 5301-AQM1 and TVOC PID (standard on the 5301-AQM2), 0-50 ppm / minimum detection level 5 ppb, accuracy ± 1.5 %, Response rate < 3 seconds


  • Alarms on counts for all particle sizes, low battery, sensor failure, environmental sensors and flow


  • ISO 21501-4 and JIS B9921

Instrument Calibration

  • Recommended minimum once per year
  • Gases, temperature and humidity sensors field calibratable

External Surface

  • Stainless Steel


  • L x W x H
  • 5.22” x 2.25” x 9.13”
  • 13.3 cm x 5.7 cm x 23.2 cm
  • Includes barb fittings


  • 4 lb
  • 1.8 kg


  • Operating Manual and IMS Software on USB flash drive
  • Isokinetic probe
  • Temperature relative humidity sensor
  • Purge filter
  • Battery
  • USB cable
  • Power supply

Optional Accessories

  • Calibration cap for gas sensor
  • Carrying case
  • External printer
  • Isokinetic probes
  • Barb fittings
  • Spare battery
  • External battery charger
  • Printed manual
  • IMS-RT monitoring system

Data Storage

  • 45,000 sample records (rotating buffer) includes particle count data, environmental data, locations, times and annotations, scrollable on screen or printout

Sample Time

  • 1 second to 99 hours


  • 110 to 240 Vac 50/60 Hz universal in-line power supply

Operating Conditions

  • 41º to 104ºF (5º to 40ºC) / 20 % to 95 % non-condensing

Storage Conditions

  • 32º to 122ºF (0º to 50ºC) / Up to 98 % non-condensing


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