Senseca
PMSenseCR Particle Matter Transmitter
Overview
Cleanrooms and controlled environments depend on continuous visibility of particle concentration. The PMSenseCR counts and classifies airborne particles by size using the laser scattering principle, supporting cleanroom monitoring as described in ISO 14644 standards.
Five channels cover > 0.3 µm, > 0.5 µm, > 1 µm, > 2.5 µm and > 5 µm. It runs continuously by default for real-time monitoring, and cyclic intervals can be set to extend sensor life. Integration is via RS485 with Modbus-RTU or ASCII protocol. Versions with two 0/4…20 mA analog outputs are available, and an optional CO2 sensor adds another air quality parameter.
Key Features
- Laser scattering principle: counts and classifies particles by size
- Output in particles per cubic meter for five size thresholds
- Continuous operation by default, or user-configurable cyclic intervals
- Particle counts averaged over 10 seconds, 60 seconds or 15 minutes
- Versions with two 0/4…20 mA outputs, each assignable independently
- Optional CO2 sensor (PMBsenseCR versions): double wavelength NDIR, 0…5000 ppm
- Maintenance-free, with fast response and long operating life
Specifications
Particulate matter
| Measuring principle | Laser scattering |
| Measured pollutants | Particles/m³ at > 0.3, > 0.5, > 1, > 2.5 and > 5 µm |
| Measuring range | < 3.3 x 10⁹ pcs/m³ (linearity is lost above this) |
| Particle size detection range | Ø 0.3…10 µm |
| Lowest detectable concentration | 350 particles/m³ |
| Detection efficiency (ISO 21501-4) | 50% ± 30% @ 0.3 µm; 100% ± 20% @ 0.5 µm |
| False count | < 3 over 15 minutes |
| Repeatability | < 3% (> 0.3 and > 0.5 µm); < 5% (> 1 µm); < 10% (> 2.5 µm); < 15% (> 5 µm) |
| Sensor warm-up time | 15 s |
| Sensor lifetime | > 10,000 hours continuous (1 meas./s); about 5 years in 5-minute cyclic mode |
CO2 (PMBsenseCR versions only)
| Measuring principle | Double wavelength NDIR |
| Measuring range | 0…5000 ppm |
| Accuracy | ±(50 ppm + 3% of measurement) @ 25 °C and 1013 hPa |
| Response time | < 120 s (air speed = 2 m/s) |
| Long-term stability | 5% of measurement / 5 years |
| Temperature drift | 1 ppm/°C |
General
| Output | RS485 with Modbus-RTU or ASCII proprietary protocol |
| Analog output (PM[B]senseCR-A only) | 2 x 0/4…20 mA (RLmax = 500 Ω); on request 2 x 0…10 V (RLmin = 10 kΩ) |
| Power supply | 7…30 Vdc (15…30 Vdc for 0…10 V analog outputs) |
| Power consumption | 25 mA @ 24 Vdc during measurement; 4 mA in stand-by (cyclic mode only), excluding analog outputs |
| Connection | M12 8-pole circular connector |
| Operating conditions | -20…+70 °C / 0…95 %RH / 500…1500 hPa |
| Housing material | Polycarbonate |
| Protection degree | IP 53, with rain-proof and UV resistant inlet air filter |
| Dimensions | 120 x 94 x 71 mm (excluding M12 connector) |
| Weight | 330 g |
| Accessories | Fixing bracket with U-bolt |
Ordering codes
PMsenseCR-M: PM only, RS485 Modbus-RTU
PMsenseCR-A: PM only, RS485 Modbus-RTU + 2 analog outputs
PMBsenseCR-M: PM + CO2, RS485 Modbus-RTU
PMBsenseCR-A: PM + CO2, RS485 Modbus-RTU + 2 analog outputs
