The wireless PM2.5 sensor measures PM1, PM2.5 and PM10 concentrations in the air and transmits the measurement to the monitoring panel. The PM2.5 sensor works by turning on a small fan at the beginning of a measurement cycle to bring in a volume of ambient air and measuring the particulate matter (PM) content of that sample volume. The sensor measures PM content using a laser that scatters based on the number and size of particles suspended in the air. It is important to keep the inlet ports of the sensor clear to ensure proper readings.
 
Measurement Sensitivity:  PM1: 0.3 to 1.0 um
                                        PM2.5: 1.0 to 2.5 um
                                        PM10: 2.5 to 10 um
Counting Efficiency: 50% @ 0.3 um, 98% @ >= 0.5 um
Effective Range: 0 to 500 ug/m^3
Maximum Range: 0 to 1000 ug/m^3
Maximum Consistency Error: +/- 10% @ 100 to 500 g/m^3
                                             +/- 10 ug/m^3 @ 0 to 100 ug/m^3
Response Time: ~10 Seconds
Active Current: ~180 mA @ 3.3 battery voltage, ~0.6 W overall
Operating Temperature: -10°C to 60°C
Operating Humidity Range: 0 to 99%
Mean Time to Failure: >= 3 Years
Battery Type: 2 Replaceable AA 1.5 V Batteries
Dimension: 4.375 in x 2.470 in x 1.12 in
Supply Voltage: 2.0 - 3.8 V (2 x AA 1.5V Batteries or Optional Power Supply)
Battery Life: At 1-hour heartbeat setting, included AA batteries will typically last 6-8 Years. **
Max Operating Temperature Using AA Alkaline: -18°C to 55°C (0°F to 130°F)
Optimal Battery Operating Temperature: +10°C to +50°C (+50°F to +122°F)
Enclosure Material: ABS
Operating Frequency:  
900 MHz Operating Frequency
Certifications: Complies with Part 15 of the FCC Rules. (FCC ID: ZTL-G2SC1)
                      Complies with Industry Canada standards. (IC: 9794A-G2SC1)
Device Range: Device Range Up to 1,200 ft. non-line-of-sight, wireless device range*
Security: Encrypt-RF® (Diffie-Hellman Key Exchange + AES-128 CBC)