
The GAIA A20 sensor is a custom-designed sensor box with the following requirements:
- Two redundant PM2.5 sensors (PMS 5003)
- GPS/Beidu GNSS + Integrated GPS Antenna
- Temperature and Humidity sensor (DHT11)
- Internal data storage, allowing up to 4 weeks continuous monitoring (with a duty cycle of 30 samples every 5 minutes).
- USB connection to retrieve the data storage
- No Wifi required (for autonomous monitoring)
- Battery powered - expect to run for at least 3 days without solar harvesting.
- Battery charing via Solar panel or USB connector, allowing forever off-grid operation, provided there are a few sunny day every week.
- Lightweight (can be hand-carried, for example attached to a handbag)
Specification Sheet
- Specification & User Manual: gaia-a20-spec-v1.6.pdf

GAIA A20 package content:

Included in the package are:
- 1 GAIA A20 station
- USB Power supply
- USB Data cabled (0.5 meters)
- 2 mounting hooks
- Solar Panel (6V/1A, eg 6W)
- Solar Panel mounting mechanical parts
- 5 meter waterproof power cable
- General mounting tools (straps and screws)
- Screw driver (for opening the A20 station and inserting the battery)
Optionally included in the package are:
- 18650 3400mA/h battery (allowing 5/7 days operation without solar harvesting)
- 18650 battery charger (with USB connector)
Solar Panel Mounting
The solar panel comes with a 5 meters (16 feet) water proof power cable (can be extended to 10 meters).

Note that it is recommended to keep the GAIA station away from direct rain
Pricing
GAIA A20 Solar
GAIA A20 with 2x PMS5003, 1x GPS, 1x Solar Panel, 1x5 meters power cable, USB cable and USB charger.
$280.00
Extra 3400 mAh battery
One 3400 mAh 18650 LiPo battery
$10.00
2 x Extra 3400 mAh batteries
Two 3400 mAh 18650 LiPo battery + battery charger
$18.00
Extra 5 meters power cable
One extra 5 meters (16 feet) water proof power cable
$5.00