2501P Remote Airborne Particle Counter

Particles Plus Remote Particle Counters

Model 2501P

0.5 – 25.0 µm @ 0.1 CFM

The 2501P particle counter provides a range of particle size measurement from 0.3 to 25.0 μm at 0.1 CFM (2.83 LPM) flow. These sensors allow for efficient particle counting with high accuracy and resolution that meet or exceed ISO 21501-4 and JIS B9921 for the calibration of a particle counter.

These units are equipped with an internal pump and manifold and do not require an external vacuum source. Integration into a building automation or facility monitoring system is easy via standard MODBUS RS-485 communication.

Measures 0.5 um to 25.0 um
0.1 CFM (2.83 LPM) flow rate
Long life laser diode technology
Measures up to 4 channels of simultaneous data
Particle concentrations up to 15,000,000 Particles/ft3 @ 10% coincidence loss
Internal vacuum pump
Internal HEPA filter
Connect using Modbus RTU/ASCII over isolated RS-485
Complies with ISO 21501-4 and JIS B9921 standards
Easy to clean and wipe down with minimal particle traps
Versatile mounting options
User configurable alarm light
LED Indicators
Seamless integration into a facility monitoring system
Lightweight stainless steel enclosure
2 year warranty. Extended warranties available.
Model2501P
Size Range0.5 to 25.0 um
Size ChannelsFactory calibrated at 0.5, 1.0, 2.5, 5.0 um
Number of Channels4
Counting Efficiency50% @ 0.5 um; 100% for particles > 0.75 um per JIS
Flow Rate0.1 CFM (2.83 LPM)
Concentration Limits15,000,000 Particles/ft3 @ 10% coincidence loss
Light SourceLong life laser diode
Zero Count< 1 count / 60 minutes (< 1 particles / 6/ft3)
CalibrationNIST traceable
Vacuum SourceInternal Vacuum Pump
AirflowInternally monitored
Filtered ExhaustInternal HEPA filter
AlarmUser configurable alarm light
Communication ModesMODBUS™ RTU or ASCII outputs (over isolated RS-485)
StandardsISO 21501-4 and JIS B9921
Instrument CalibrationRecommended minimum once per year
External SurfaceStainless steel
Dimensions (L x W x H)3.59” x 1.83” x 5.66” (9.1 cm x 4.6 cm x 14.3 cm) including probes and connectors
Weight1.94 lb. (0.88 kg)
AccessoriesWiring Connector, operating manual on USB flash drive
Optional AccessoriesPower Supply, Remote Mounting Bracket, Stainless Steel Barbed Isoprobe (0.1 CFM/2.83 LPM), Purge Filter Assembly, and Sample & Vacuum Tubing
Sample Time1 second to 18 hours
Power9 - 24 VDC (< 2.5 watts)
Operating Conditions41° to 104°F (5° to 40°C) / 20% to 95% non-condensing
Storage Conditions32° to 122°F (0° to 50°C) / Up to 98% non-condensing
Warranty2 year limited warranty. Extended warranties available.