Remote Airborne Particle Counters, 5301 and 5501

0.1CFM (2.83 LPM)

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

Article: 5301

Article: 5501



  • 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
  • The most comprehensive internal self-diagnostics of any remote particle counter
  • Remote diagnostics allow for remote service investigation through the Internet
  • Supports MODBUS TCP, RTU and ASCII communication over Ethernet, or (optional) RS-485/RS-232
  • Internet of Things (loT) communication allows for network or cloud-based data options

The Particles Plus® 5301 and 5501 Remote Particle Counters measure 0.3 or 0.5 to 25.0 μm and are the most feature advanced remote particle counters available.
Integration is easy into a building automation and cleanroom management system via Ethernet, or (optional) Wireless 802.11 b/g, RS485 or RS232. Integrated web server displays instrument screen through any browser.
The 5301 and 5501 remote particle counters display and report 6 user-selectable particle size channels, as well as (optional) temperature and humidity, flow and sensor status, date of last calibration, serial number, laser on-time, and date of manufacture for easy maintenance and warranty management. Storing up to 45,000 time-stamped particle count
and environmental data records provides data redundancy on every instrument. Particles Plus® counters can be monitored remotely via web browser, or controlled and monitored using IMS Software.

All Particles Plus® counters meet ISO 21501-4 and JIS B9921. The 5301 and 5501 ensurecompliance with an on-board pulse height analyzer.

Data Sheet 5301/5501

Features and Benefits

• 5301: Measures 0.3 μm to 25 μm
• 5501: 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
• (Optional) Temperature and relative humidity probe
• 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
• Versatile mounting options
• 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 5301                                                                             5501
Size Range 0.3 to 25.0 μm                                                             0.5 to 25.0 μm
Size Channels 5301 Factory calibrated at 0.3, 0.5, 1.0, 2.5, 5.0, 10.0 μm variable binning
5501 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)
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 Requirements External vacuum >15” (38.1 cm) of Hg
Airflow Internally monitored
Number of Channels 6
Custom Size Channels Calibration for custom size channels available
Audible Alarm Adjustable built-in alarm
Reports ISO 14644-1, EU GMP Annex 1, FS 209E
Communication Modes Ethernet and USB (Optional) Wireless 802.11 b/g, RS485 or RS232.
Environmental Sensor (Optional) 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) 5.2” x 2.3” x 8.9” (13.3 cm x 5.8 cm x 22.6 cm) includes barb fittings
Weight 2.6 lb (1.18 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


2 Years. Extended warranties available.