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Remote Airborne Particle Counters 2301 and 2501

Particle counters provide a range of particle size measurement from 0.3 or 0.5 to 25.0 μm at a flow rate of 0.1 CFM (2.83 LPM).

Article: 2301

Article: 2501

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Description

The 2301 and 2501 particle counters provide a range of particle size measurement from 0.3 or 0.5 to 25.0 μm at a flow rate of 0.1 CFM (2.83 LPM). These sensors allow for efficient particle counting with specifications that exceed the ISO 21501-4 and JIS B9921 calibration standards.
These sensors have 4 fixed particle size channels and are equipped with an integral critical orifice and flow sensor to provide a stable flow rate from an external vacuum source. Integration into a building automation or facility monitoring system is easy via isolated RS-485 Modbus communication.

Datasheet 2301/2501

Features and Benefits

• 2301: Measures 0.3 μm to 25 μm
• 2501: Measures 0.5 μm to 25 μm
• 0.1 CFM (2.83 LPM) flow rate
• Long life laser diode technology
• Measures up to 4 channels of simultaneous data
• Accurate in high particle concentration environments
• Internal critical orifice
• 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
• Alarm light
• LED Indicators
• Seamless integration into a facility monitoring system
• Lightweight stainless steel enclosure
• 2 year warranty. Extended warranties available.

Specifications

Model 2301 2501
Size Range 0.3 µm to 25 µm 0.5 µm to 25 µm
Size Channels Factory calibrated at 0.3, 0.5, 1.0, and 5.0 µm Factory calibrated at 0.5, 1.0, 2.5, and 5.0 µm
Number of Channels 4 channels 4 channels
Counting Efficiency 50% @ 0.3µm; 100% for particles > 0.45 µm per JIS 50% @ 0.5µm; 100% for particles > 0.75 µm per JIS
Flow Rate 0.1 CFM (2.83 LPM)
Concentration Limits 10,000,000 particles/ft3 @ 10% coincidence (per ISO 21501-4),

20,000,000 particles/ft3 @ 10% coincidence (as tested and validated1)
Light Source Long life laser diode
Zero Count < 1 count / 60 minutes (< 1 particles /6 ft3)
Calibration NIST traceable
Vacuum Requirements External vacuum > 15” (38.1cm) of Hg
Airflow Internally monitored
Alarm User configurable alarm light
Communication Modes MODBUS™ RTU or ASCII outputs (over isolated RS-485)
Standards ISO 21501-4 and JIS B9921
Instrument Calibration Recommended minimum once per year
External Surface Stainless steel
Dimensions (L x W x H) 3.59” x 1.83” x 5.01” (9.1 cm x 4.6 cm x 12.7 cm) including probes and connectors
Weight 1.65 lb. (0.75 kg)
Accessories Wiring Connector, operating manual on USB flash drive
Optional Accessories Power Supply, Remote Mounting Bracket, Stainless Steel Barbed Isoprobe (0.1 CFM/2.83 LPM), Purge Filter Assembly, and Sample & Vacuum Tubing
Sample Time 1 second to 18 hours
Power 9 – 24 VDC (< 2.5 watts)
Operating Conditions 41° to 104°F (5° to 40°C) / 20% to 95% non-condensing
Storage Conditions 32° to 122°F (0° to 50°C) / Up to 98% non-condensing
Warranty 2 year limited warranty. Extended warranties available.

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