2501 Remote Airborne Particle Counter
Particles Plus Remote Particle Counters
Model 2501
0.5 – 25.0 µm @ 0.1 CFM
The 2501 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.
| 2301: Measures 0.3 μm to 25.0 μm |
| 2501: 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 |
| 2 year warranty. Extended warranties available. |
| Model | 2501 |
|---|---|
| Size Range | 0.5 to 25.0 μm |
| Size Channels | Factory calibrated at 0.5, 1.0, 2.5, 5.0 μm |
| Number of Channels | 4 |
| Counting Efficiency | 50% @ 0.5 μm; 100% for particles > 0.75 μm per JIS |
| Flow Rate | 0.1 CFM (2.83 LPM) |
| Concentration Limits | 15,000,000 Particles/ft3 @ 10% coincidence loss |
| Light Source | Long life laser diode |
| Zero Count | < 1 count / 60 minutes (< 1 particles /6ft3). 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) | 3.59” x 1.83” x 5.01” (9.1 cm x 4.7 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. |
