Airy Technology®
Remote Particle Counters
R2501 Remote Particle Counter
0.5 – 25.0 µm @ 0.1 CFM
The R2501 particle counter provides a range of particle size measurement from 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.
| Measures 0.5 μm to 25.0 μm |
| 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 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 |
| User configurable alarm light |
| LED Indicators |
| Seamless integration into a facility monitoring system |
| Lightweight stainless steel enclosure |
| 1 year limited warranty. Extended warranties available. |
| Size Range | 0.5 μm to 25.0 μm |
| Size Channels | Factory calibrated at 0.5, 1.0, 2.5, and 5.0 μm |
| Number of Channels | 4 channels |
| Counting Efficiency | 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). No fault count subtraction. |
| 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) | 1.83” x 3.59” x 5.01” (4.6 x 9.1 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), 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 | 1 year limited warranty. Extended warranties available. |
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Part Number: AS-99015 | Part Number: EE-80092 | Rechargeable & Removable Part Number: EE-80003A | (For EE-80003A) Part Number: AS-99005A |
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Part Number: EE-80014A | 0.1 CFM (2.83 LPM) Part Number: AS-99002 | 0.1 CFM (2.83 LPM) Part Number: AS-99002A | Connector (5 POS) Part Number: EE-79015A |
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0.1 CFM (2.83 LPM) Part Number: PS-12041 | 0.1 CFM (2.03 LPM) Part Number: PS-12070 | 0.1 CFM (2.83 LPM) Part Number: PS-12022 | 1/8 (Stainless) Part Number: PS-12005 |
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Includes 2 Rolls of Paper Part Number: AS-99011 | Single Roll Part Number: AS-99012 | Cleanroom Paper (10 Pack) Part Number: AS-99013 | 15V ~2A 100-240 VAC Part Number: EE-80127 |
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USA, Japan, Philippines, Taiwan Part Number: EE-80128 | Europe & Korea Part Number: EE-80129 | UK, Malaysia & Singapore Part Number. EE-80130 | China & Australia Part Number: EE-80131 |
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3/8" OD (1/4" ID) Part Number: AS-99019 | 3/8" OD (1/4" ID) Bev-A-Line XX Part Number: AS-99037 | Part Number: MN-24001 | 6ft (1.8m) Part Number: AS-99022 |
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User Manual (Printed) Part Number: MN-24001P | Validation Manual Part Number: MN-24002 |