Remote Airborne Particle Counters 7301 and 7501



Ideal for use in research, industrial health and safety, indoor air quality, and cleanroom applications.



• 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® 7301 and 7501 Remote Particle Counters measure 0.3 or 0.5 to 25.0 μm with a flow rate of 0.1 CFM (2.83 LPM). Easy to configure, this instrument displays up to 6 user-selectable size channels as well as temperature and relative humidity. View data and generate ISO 14644-1, EU GMP Annex 1 or FS 209E reports on screen or via printer, USB key, real time through its versatile output options or export to Particles Plus® Instrument Management Software.
Particles Plus® counters can be controlled and monitored remotely via web browser. The instruments’ mass concentration mode approximates density in μg/m3 and allows fordensity and refractive index corrections to ensure accuracy.

The 7301 and 7501 can be used as stand-alone battery operated instruments or they can be easily integrated into a building automation and cleanroom management system via Ethernet, USB, or (optional) Wireless 802.11 b/g, RS485 or RS232.

All Particles Plus® counters meet ISO 21501-4 and JIS B9921. The 7301 and 7501 ensure compliance with an on-board pulse height analyzer.

Datasheet 7301/7501

Features and Benefits

• 7301: Measures 0.3 μm to 25 μm
• 7501: Measures 0.5 μm to 25 μm
• 0.1 CFM (2.83 LPM) flow rate
• Long life laser diode technology
• Measures up to 6 channels of simultaneous data
• Approximates mas concentration in μg/m3 with density/refractive index corections
• Large easy-to-use icon driven colour 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 alows user to save 32 character notations to a sample record
• Easy configuration and transferable from instrument to instrument
• Connect using Ethernet, USB or (optional) Wireles 802.11b/g, RS485 or RS232
• Static or dynamic IP address (DHCP)
• Remote diagnostics allows for remote service investigation through the internet
• Displays user-definable reports for ISO 14644-1, EU GMP Annex 1 and FS 209E
• Internal audible alarm
• 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 facitilty monitoring system
• Light weight stainles steel enclosure
• 2 year limited waranty. Extended waranties available


Model 7301                                                                             7501
Size Range 0.3 to 25.0 μm                                                             0.5 to 25.0 μm
Factory calibrated at 0.3, 0.5, 1.0, 2.5, 5.0, 10.0 μm variable binning Factory calibrated at 0.5, 0.7, 1.0, 2.5, 5.0, 10.0 μm variable binning
Counting Efficiency 50% @ 0.3 μm; 100% for particles >0.45 μm per JIS     50% @ 0.5 μm; 100% for particles >0.75 μm per JIS
Concentration Limits 15,000,000 particles/ft3 @ 10% coincidence (per ISO 21501-4),

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

Flow rates 0.1 CFM (2.83 LPM)
Battery Run Time >10 hours
Light Source Long life laser diode
Zero Count <1 count / 60 minutes (<1 particles / 6 ft3)
Count Modes Real-Time Meter and graph, 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
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 built-in alarm
Battery Removable Li-ion
Battery 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, low battery, sensor failure, environmental sensors and flow
Standards ISO 21501-4 and JIS B9921
Calibration Recommended minimum once per year
External Surface Stainless steel
Dimensions (L x W x H) 5.22” x 3.81” x 9.42” (14.0 cm x 9.7 cm x 23.9 cm) includes barb fitings
Weight 4 lb (1.8 kg)
Accessories Operating manual on USB flash drive, isokinetic probe, temperature relative humidity sensor, purge filter, battery, data download software, USB cable, power supply & cable
Optional Accessories Printed manual, spare battery, external battery charger, external printer and isokinetic probes
Buffer Memory 45,000 sample records (rotating buffer) including particle count data, environmental data, locations and 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