Air Quality
General Description
The ALTA Wireless - Air Quality Sensor measures particulate matter (PM) concentrations in the air.
Key Features
Measurement Sensitivity:
PM1: 0.3 to 1.0 um
PM2.5: 1.0 to 2.5 um
PM10: 2.5 to 10 um
Effective Range: 0 to 500ug/m^3
Maximum Range: 0 to 500ug/m^3
Counting Efficiency: 50% @ 0.3 um, 98% @ >= 0.5 um
Principles of Operation
The ALTA Wireless Air Quality Sensor measures the particulate matter (PM) based on a user-configurable time interval or Heartbeat. The sensor works by turning on a small fan at the beginning of a measurement cycle to bring in a volume of ambient air and measure the PM content of that sample. The sensor measures PM content using a laser that scatters based on the number and size of particles suspended in the air. This measurement is then sent to the gateway, making the data available in iMonnit, or another approved data service.
It is important to keep the air ports of the sensor clear to ensure proper readings. Remember to:
Install the meter with the air ports pointing down to prevent accumulation of dust and moisture.
Ensure that the air ports are open to the ambient air without any obstructions within 25 mm (1 inch).
Features of Monnit ALTA Sensors
Wireless range of 2,000+ feet through 18+ walls1
Frequency-Hopping Spread Spectrum (FHSS)
Best-in-class interference immunity
Best-in-class power management for longer battery life2
Encrypt-RF® Security (Diffie-Hellman Key Exchange + Advanced Encryption Standard (AES)-128 Cipher Block Chaining (CBC) for sensor data messages)
Sensor logs 2000 to 4000 readings if the gateway connection is lost (non-volatile flash, persists through power cycling):
10-minute Heartbeats = ~ 22 days
2-hour Heartbeats = ~ 266 days
Automatic over-the-air updates to sensor firmware (future-proof)
Free iMonnit Basic Online Wireless Sensor Monitoring and Notification System to configure sensors, view data, and send alerts via SMS text, email, and voice call
1 Actual range may vary depending on the environment and gateway.
2 Battery life is determined by the sensor reporting frequency and other variables. Other power options are also available
