Airy Technology®
Remote Particle Counters
R2301P Remote Airborne
Particle Counter
0.3 – 25.0 µm @ 0.1 CFM
The Airy Technology® R2301P Remote Airborne Particle Counter is designed for continuous monitoring in cleanrooms and other controlled environments. With four particle size channels ranging from 0.3 up to 25.0 μm, these instruments deliver targeted contamination detection with realtime data collection and configurable alarms for immediate incident reporting and local visual alerts.
The compact, angled enclosures enable installation in tight locations while minimizing disruption to unidirectional airflow. These sensors are equipped with an internal vacuum source and HEPA filtered exhaust
Built for scalability and long-term reliability, these models utilize durable laser diodes backed by a lifetime warranty and deliver exceptional zero-count performance. The R2000 Series sensors allow for efficient particle counting with specifications that exceed the ISO 21501-4 and JIS B9921 calibration standards.
With seamless connectivity, remote diagnostics, and a standardized architecture, they offer simplified integration and
| Model | R2301P | R2501P |
| 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 |
| 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 / 6ft3). No fault count subtraction. | |
| Calibration | NIST traceable | |
| Vacuum Source | Internal vacuum pump with HEPA filter | |
| Airflow | Internally monitored | |
| Number of Channels | 4 Channels | |
| Alarm | User configurable alarm light | |
| Communication Modes | MODBUS™ RTU, ASCII (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) | 3.5” x 1.8” x 5.6” (8.9 cm x 4.6 cm x 14.2 cm) including probes and connectors | |
| Weight | 1.94 lb. (0.88 kg) | |
| Accessories | Wiring Connector, Operating and User Manual on USB flash drive | |
| Optional Accessories | Power Supply, Remote Mounting Bracket, Isokinetic Probe, Filter Assembly, Sample & Vacuum Tubing | |
| Sample Time | 1 second to 99 hours | |
| Power | 9 - 24 VDC (< 1.5 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 and Lifetime Warranties available) | |
 |  |  |  |
Carrying Case |
Wireless 802.11 b/g with Output Antenna |
Battery 55Wh |
External 55h Battery Charger |
 |  |  |  |
Temperature and Humidity Probe |
Filter |
Filter Assembly |
RS-485/232 |
 |  |  |  |
Isoprobe Threaded (Ni Plated Al) |
Isoprobe Threaded (Stainless) |
Isoprobe Barbed (Stainless) |
Inlet Fitting Barbed |
 | 
/> |  |  |
External Thermal Printer |
Thermal Printer Paper |
Thermal Printer Paper |
Power Supply |
 |  |  |  |
Power Supply Connector |
Power Supply Connector |
Power Supply Connector |
Power Supply Connector |
 |  |  |  |
Tubing (per foot) |
Tubing (per foot) |
IMS Software & User Manual (USB Key) |
USB Cable |
 | | ||
R2000 Series |
R2000 Series |