Handheld Airborne Particle Counters 8303 and 8503

0.1 CFM (2.83 LPM)

Article: 8303

Article: 8503



  • Industry’s highest concentration of 15,000,000 particles/ft3 @ 10% coincidence loss
  • Ideal for use in research, industrial health and safety, indoor air quality, and cleanroom applications
  • Up to 10 hours continuous operation on a fully charged battery
  • Industry’s first Sleep Mode and Power Conservation Mode with Intelligent Battery
  • The most comprehensive internal self-diagnostics of any handheld particle counter
  • Real-Time Meter detects particle contamination sources with visual and audible indication
  • Internet of Things (loT) communication allows for network or cloud-based data options

The Particles Plus® 8303 and 8503 Handheld Particle Counters measure 0.3 to 25.0 μm with a flow rate of 0.1 CFM (2.83 LPM).

Easy to configure, this instrument displays up to 3 user-selectable size channels as well as (optional) temperature and relative humidity. View data and generate ISO 14644-1, EU GMP Annex 1 or FS 209E reports. Export to Particles Plus® data-software. The 8303 also has a mass concentration mode that approximates density in μg/m3.

All Particles Plus® counters meet ISO 21501-4 and JIS B9921. The 8303 and 8503 ensure compliance with an on-board pulse height analyzer.

Datasheet 8303/8503

Features and Benefits

  • 8303 Measures 0.3 μm to 25.0 μm
  • 8305 Measures 0.5 μm to 25.0 μm
  • 0.1 CFM (2.83 LPM) flow rate
  • Long life laser diode technology
  • Measures up to 3 channels of simultaneous data
  • Approximates mass concentration in μg/m3 with density and refractive index corrections
  • Integrated handle for one-handed operation
  • Large easy-to-use icon driven color touch screen display
  • Temperature and relative humidity probe included
  • Stores up to 45,000 sample records, 1,000 sample locations and 50 recipes
  • Annotation function allows user to save 32 character notations to a sample record
  • Remote diagnostics allows for remote service investigation through the Internet
  • Easy configuration and transferable from instrument to instrument
  • Connect using Ethernet, USB or (optional) Wireless 802.11 b/g, RS 485 or RS232
  • Displays user-definable reports for ISO 14644-1, EU GMP Annex 1 and FS 209E
  • Internal audible alarm with comprehensive alarm management
  • User-selectable channel sizes
  • Complies with ISO 21501-4 and JIS B9921 standards
  • Easy to clean and wipe down with minimal particle traps
  • Seamless integration into a facility monitoring system
  • Lightweight high-impact injection molded plastic enclosure
  • 2 year limited warranty. Extended warranties available.


Model 8303 8503
Size Range 0.3 to 25 μm 0.5 to 25 μm
Size Channels Factory calibrated at 0.3, 0.5, 5.0 μm Factory calibrated at 0.5, 1.0, 5.0 μm
Flow rates 0.1 CFM (2.83 LPM)
Concentration Limits 15,000,000 particles/ft3 @ 10% coincidence (per ISO 21501-4),

30,000,000 particles/ft3 @ 10% coincidence (as tested and validated1)

Battery Run Time >10 hours continuous operation
Light Source Long life laser diode
Counting Efficiency 50% @ 0.3 μm; 100% for particles >0.45 μm per JIS
Zero Count <1 count / 60 minutes (<1 particles / 6 ft³)
Count Modes Real-Time Meter and graph, cumulative/differential count/m³and 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
Printer (Optional) External thermal printer available
Vacuum Source Internal pump with automatic flow control
Filtered Exhaust Internal HEPA filter
Number of Channels 3
Custom Size Channels Calibration for custom size channels available
Audible Alarm Adjustable built-in alarm
Battery Removable Li-ion (Recharge time: 4 hours within instrument, <2 hours with external battery charger)
Reports ISO 14644-1, EU GMP Annex 1, FS 209E
Recipes 50 user-configurable recipes
Communication Modes Ethernet and USB. (Optional) Wireless 802.11 b/g, RS485 or RS232
Environmental Sensor Includes temperature 32º to 122ºF (0º to 50ºC) ±1ºF (0.5ºC) and relative humidity probe 15-90% ±2%
Alarm Alarms on counts for all particle sizes, sensor failure, environmental sensors and flow
Standards ISO 21501-4 and JIS B9921
Calibration Recommended minimum once per year
External Surface High impact injection molded plastic
Dimensions (L x W x H) 5.12” x 4.25” x 12.26” (13.0 cm x 10.8 cm x 31.1 cm) includes handle and does not include probes
Weight 2.2 lb (1.0 kg)
Accessories Operating manual and IMS software on USB flash drive, isokinetic probe, temperature relative humidity sensor, purge filter, battery, data download software, USB cable, power supply and cable
Optional Accessories Printed manual, carrying case, spare battery, external battery charger, external printer and isokinetic probes, barbed fittings, IMS-RT monitoring system
Buffer Memory 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 Locations Up to 1,000 locations 20 characters long
Sample Time 1 second to 99 hours
Power 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
Warranty 2 Years. Extended warranties available.