8301-AQM1 and 8301-AQM2 Handheld
Air Quality and Environmental Monitor
Indoor Air Quality Monitors

Models 8301-AQM1 and
8301-AQM2
(CO2, Temp, RH, and TVOC)
The Particles Plus® 8301-AQM1 and 8301-AQM2 Handheld Particle Counters were designed for cleanroom monitoring, indoor air quality, industrial hygiene, research, and health & safety applications. Their patented, feature-rich design enables dynamic environmental monitoring and versatile data reporting across multiple industries.
The 8301-AQMs measure particles from 0.3 to 25 μm in six user-selectable channels at a flow rate of 0.1 CFM (2.83 LPM). They offer data reporting in standard cleanroom formats or by mass concentration in μg/m³, with optional density and refractive index corrections. These user-friendly instruments display up to six particle size channels, temperature, relative humidity, and CO2 (AQM1) or CO2 + TVOC (AQM2).
With unique features like Particles/Second and the Real-Time Meter, the 8000 Series enables efficient, on-the-go particle investigations across nearly any environment. The instruments can also operate as remote particle counters, leveraging intelligent battery and power conservation modes to achieve up to 100 hours of battery life.
The Particles Plus® standardized hardware and firmware simplify maintenance and reduce the total cost of ownership. Combined with extensive remote diagnostics and a lifetime warranty, the 8301-AQMs ensure industry-leading performance and long-term value.
• Stores up to 45,000 sample records, 1,000 sample locations and 50 recipes |
• Approximates mass concentration in μg/m³ with density and refractive index corrections |
• Large, intuitive color touch screen display with an easy-to-use icon-driven interface |
• 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 |
• Over 10 hours continuous sampling on a single charge |
• Integrated handle for one-handed operation |
• 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 and wipe down with minimal particle traps |
• Equipped with a standard 1/4”–20 female mount for tripod compatibility |
• Lightweight high-impact injection molded plastic enclosure |
• 2 year Limited Warranty (Extended and Lifetime warranties available) |
Model | 8301-AQM1 and 8301-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) |
Aerosol Concentration Range | 0.01 to 20,000 μg/m³ |
Light Source | Long life laser diode |
Resolution | 0.00003 μg/m3 |
Zero Stability | No appreciable drift |
Count Modes | Particles/second, Real-Time Meter, cumulative/differential count/m³ and count/ft³, and mass concentration |
Log Interval | Minimum 1 second with no hold time, maximum 99 hours |
Calibration | NIST traceable |
Display | 4.3″ (10.9 cm) WQVGA (480×272) color touch screen |
Printer | (Optional) 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 integrated alarm |
Communication Modes | Ethernet, USB, RS485, RS232, and optional 802.11b/g wireless |
Environmental Sensors 8301-AQM1 | Includes NDIR-CO2 sensor (0-5000 ppm ±1%, resolution 1 ppm, response rate 20 seconds), temperature (32-122°F, ±1°F / 0-50°C, ±0.5°C) and relative humidity probe (15–90% RH, ±2%) |
Environmental Sensors 8301-AQM2 | Includes all sensors in the 8301-AQM1 and PID-TVOC sensor (5 ppb - 50 ppm ±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 | Lightweight high-impact injection molded plastic enclosure |
Dimensions (L x W x H) | 6.33 x 4.25 x 12.26 in (16.1 x 10.8 x 31.1 cm) includes handle and does not include probes |
Weight | 2.5 lb (1.1 kg) |
Accessories | User manual + Instrument Management Software (IMS) on USB flash drive, isokinetic probe, temperature relative humidity sensor, purge filter, battery, USB cable, and power supply |
Optional Accessories | Printed manual, case, spare battery, external battery charger, external printer, barbed fitting, and 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) |
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Handheld Carrying Case Part Number: AS-99015 | Wireless 802.11 b/g with Output Antenna Part Number: EE-80092 | Battery 55Wh Rechargeable & Removable Part Number: EE-80003A | External 55h Battery Charger (For EE-80003A) Part Number: AS-99005A |
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Temperature and Humidity Probe Part Number: EE-80014A | Filter 0.1 CFM (2.83 LPM) Part Number: AS-99002 | Filter Assembly 0.1 CFM (2.83 LPM) Part Number: AS-99002A | RS-485/232 Connector (5 POS) Part Number: EE-79015A |
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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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External Thermal Printer Includes 2 Rolls of Paper Part Number: AS-99011 | Thermal Printer Paper Single Roll Part Number: AS-99012 | USB Cable 6ft (1.8m) Part Number: AS-99022 | Power Supply 15V ~2A 100-240 VAC Part Number: EE-80127 |
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Power Supply Connector USA, Japan, Philippines, Taiwan Part Number: EE-80128 | Power Supply Connector Europe & Korea Part Number: EE-80129 | Power Supply Connector UK, Malaysia & Singapore Part Number. EE-80130 | Power Supply Connector China & Australia Part Number: EE-80131 |
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Tubing (per foot) 3/8" OD (1/4" ID) Part Number: AS-99019 | Tubing (per foot) 3/8" OD (1/4" ID) Bev-A-Line XX Part Number: AS-99037 | IMS Software & User Manual (USB Key) Part Number: MN-24001 | 8000-AQM Series Validation Manual Part Number: MN-24002 |
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8000-AQM Series User Manual (Printed) Part Number: MN-24001P |