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The Airy Technology P231 is very small fixed mount particle counter that measures 0.5 µm and 5.0 µm particles with a flow rate of 1.0 CFM. The P231 ingrates with any MODBUS based building management system. The P231 measures particles from 0.5 µm and 5.0 µm with a flow rate of 1.0 CFM (28.3 LPM). The P231 is ideal for cleanroom continuous monitoring and ISO Cleanroom Certification.
Technical Specifications - Airy P231
| Particle Channel Sizes | 0.5 µm and 5.0 µm |
| Counting Efficiency | 50% at 0.5 μm; 100% for particles > 0.75 μm (per JIS) |
| Concentration Limit | 500,000 particles / ft3 at 5% coincidence loss |
| Light Source | Long Life Laser Diode |
| Zero Count Level | <1 count / 5 minutes (per JIS B9921) |
| Size Resolution | <15% at 0.7 μm (per ISO 21501-4) |
| Flow Rate | 1.0 CFM (28.3 LPM) |
| Flow Control | Critical orifice |
| Vacuum Requirements | External vacuum >15” (38.1 cm) of Hg |
| Calibration | NIST traceable |
| Sample Probe/Tubing | Isokinetic sampling probe |
| Communication Interface | Modbus™ RTU or Modbus™ ASCII outputs (specified upon order) |
| Power | 9-30 VDC |
| Dimensions (L x W x H) | 1.8” x 3.7“ x 1.5” (4.5 cm x 9.3 cm x 3.8 cm) does not include probes |
| Weight | 0.62 lb (0.28 kg) |
| Standards | ISO 21501-4 and JIS B9921 |
| Warranty | 2 year limited warranty |
| Operating Conditions | 5° to 35°C 20% to 95%RH non-condensing |
| Storage Conditions | -20° to 50°C Up to 98%RH non-condensing |
| Included Accessories | Isokinetic sampling probe and user manual |
| Optional Accessories | Purge filter, data cable, vacuum and sample tubing |
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