5301-AQM1 and 5301-AQM2 Remote
Air Quality and Environmental Monitor
Indoor Air Quality Monitors

Models 5301-AQM1 and 5301-AQM2
(CO2, Temp, RH, and TVOC)
The Particles Plus® 5301-AQM1 and 5301-AQM2 Remote Particle Counters measure particles from 0.3 to 25.0 μm at a flow rate of 0.1 CFM (2.83 LPM). These user-friendly instruments display up to six particle size channels, temperature, relative humidity, and CO2 (AQM1) or CO2 + TVOC (AQM2).
Designed for research, industrial hygiene, indoor air quality, and cleanroom applications, the 5000 Series offers exceptional versatility. From the cleanest labs to the dirtiest worksites, confidently monitor any environment thanks to the industry’s highest particle concentration limits.
One of the key advantages of the 5000 Series as a remote particle counter is its built-in touchscreen display. It provides real-time visual feedback for technicians working in critical areas, enabling immediate identification of elevated particle counts. Adjustable audible alarms offer an additional layer of awareness in critical environments.
Data can be managed directly on the device or through the free Particles Plus® software. Export raw data in .CSV format or generate compliant reports (ISO 14644-1, EU GMP Annex 1, or FS 209E). Remote diagnostics are also available from anywhere with an internet connection. The 5000 Series can function as a fully portable, battery-operated solution or be easily integrated into building automation and cleanroom management systems with multiple communication options.
• Stores up to 45,000 sample records, 1,000 sample locations and 50 recipes |
• Long life laser diode technology for reliable performance |
• Approximates mass concentration in μg/m³ with density and refractive index corrections |
• User selectable PM sizes from 0.3 to 10 μm including TPM of up to 25.0 μm |
• Large, intuitive color touch screen display with an easy-to-use icon-driven interface |
• Temperature and relative humidity probe included |
• Resolve issues quickly from any location with internet-enabled remote diagnostics |
• Annotation function allows user to save 32 character notations to a live sample record |
• Common interface ensures ease of use across all products |
• Connect using Ethernet, USB, Wi-Fi (optional), RS 485 or RS232 |
• Displays user-definable reports for ISO 14644-1, EU GMP Annex 1 and FS 209E |
• Built-in visual and audible alarms with comprehensive alarm management |
• Complies with ISO 21501-4 and JIS B9921 standards |
• Easy to clean, lightweight stainless steel enclosure with minimal particle traps |
• Versatile mounting options |
• 2 year Limited Warranty (Extended and Lifetime warranties available) |
Model | 5301-AQM1 and 5301-AQM2 |
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 rates / Accuracy | 0.1 CFM (2.83 LPM) / ± 3% or 1.2 LPM ± 3% |
Concentration Limits | 15,000,000 particles/ft3 @ 10% coincidence (per ISO 21501-4), |
30,000,000 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 |
Counting Efficiency | 50% @ 0.3 μm; 100% for particles >0.45 μm per JIS |
Zero Count | <1 count / 60 minutes (<1 particles / 6 ft3). No fault count subtraction. No appreciable drift. |
Count Modes | Particles/second, Real-Time Meter, cumulative/differential count/m³ and count/ft³, and mass concentration (PM) |
Count Alarms | 1 to 9,999,999 counts |
Calibration | NIST traceable |
Display | 4.3″ (10.9 cm) WQVGA (480×272) color touch screen |
Optional Printer | External thermal printer available |
Vacuum Source | Internal pump with automatic flow control |
Filtered Exhaust | Internal HEPA filter |
Number of Channels | 6 |
Custom Size Channels | Calibration for custom size channels available |
Audible Alarm | Adjustable built-in alarm |
Communication Modes | Ethernet, USB, Wireless 802.11 b/g (Optional), RS485 or RS232 |
Environmental Sensors (AQM1) | 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) ±1ºF (0.5ºC), 15-90% ±2% RH |
Environmental Sensors (AQM2) | 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 |
Alarm | Alarms for particle counts (any size channel), sensor failure, environmental sensors, and flow rate |
Standards | ISO 21501-4 and JIS B9921 |
Instrument Calibration | Recommended minimum once per year. Gases, temperature and humidity sensors field calibratable. |
External Surface | Stainless steel |
Dimensions (L x W x H) | 5.22 x 3.81 x 9.42 in (13.3 x 9.7 x 23.9 cm) includes barb fittings |
Weight | 4 lb (1.8 kg) |
Accessories | User manual + Instrument Management Software (IMS) on USB flash drive, isokinetic probe, temperature relative humidity sensor, purge filter, USB cable, and power supply |
Optional Accessories | Printed manual, carrying case, external printer, barbed fittings, and sample tubing |
Data Storage | 45,000 sample records (rotating buffer) including particle count data, environmental data, locations, annotations, and times. Scrollable on screen or printout.times. Scrollable on screen or printout |
Sample Time | 1 second to 99 hours |
Power | 110 to 240 VAC 50/60 Hz universal in-line power supply |
Operating Conditions | 41-104ºF (5-40ºC) / 20% to 95% non-condensing |
Storage Conditions | 32-122ºF (0-50ºC) / Up to 98% non-condensing |
Warranty | 2 Year Limited Warranty (Extended and Lifetime Warranties available) |
1- Validated by independent analysis see paper available at www.particlesplus.com/aac2022_paper

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Filter 0.1 CFM (2.83 LPM) Part Number: AS-99002 | Temperature and Humidity Probe Part Number: EE-80014A | Remote Mounting Bracket Part Number: AS-99001 | Wireless 802.11 b/g with Output Antenna Part Number: EE-80092 |
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Isoprobe Threaded (Ni Plated Al) 0.1 CFM (2.83 LPM) Part Number: PS-12041 | Isoprobe Threaded (Stainless) 0.1 CFM (2.03 LPM) Part Number: PS-12070 | Isoprobe Barbed (Stainless) 0.1 CFM (2.83 LPM) Part Number: PS-12022 | Inlet Fitting Barbed 1/8 (Stainless) Part Number: PS-12005 |
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Tubing (per foot) 3/8" OD (1/4" ID) Part Number: AS-99019 | Tubing (per foot) 1/4" OD (1/8" ID) Part Number: AS-99018 | Tubing (per foot) 3/8" OD (1/4" ID) Bev-A-Line XX Part Number: AS-99037 | Tubing (per foot) 1/4" OD (1/8" ID) Bev-A-Line XX Part Number: AS-99036 |
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USB Cable 6ft (1.8m) Part Number: AS-99022 | Power Supply 15V ~2A 100-240 VAC Part Number: EE-80127 | Power Supply Connector UK, Malaysia & Singapore Part Number. EE-80130 | Power Supply Connector China & Australia Part Number: EE-80131 |
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Power Supply Connector Europe & Korea Part Number: EE-80129 | Power Supply Connector USA, Japan, Philippines, Taiwan Part Number: EE-80128 | 5000-AQM Series User Manual (Printed) Part Number: MN-24004P | 5000-AQM Series Validation Manual Part Number: MN-24006 |
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IMS Software & User Manual (USB Key) Part Number: MN-24004 |