Sulfur dioxide (SO₂) is a gaseous air pollutant produced mainly by burning fossil fuels and by industrial processes such as smelting and refining. LoRaWAN SO₂ sensors measure its concentration in ambient air, usually reporting in parts per million (ppm) or micrograms per cubic meter (µg/m³).
A typical device pairs an electrochemical or metal-oxide gas cell with a LoRaWAN radio. It samples on a set interval, packs the reading into a small uplink payload, and sends it to a gateway and onward to a network server, where a codec decodes the value. Low power draw lets many units run for long stretches on batteries or solar.
These sensors support ambient air-quality monitoring, industrial perimeter and stack-area surveillance, and compliance reporting. When comparing options, weigh:
- Measurement range and accuracy
- Sensor type, expected drift and calibration needs
- Battery life and power source
- Enclosure (IP) rating for outdoor exposure
- Supported frequency plans and available payload decoder
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Frequently asked questions
What does a LoRaWAN SO₂ sensor measure?
It measures the concentration of sulfur dioxide (SO₂) gas in ambient air, typically reported in parts per million (ppm) or micrograms per cubic meter (µg/m³). SO₂ is a pollutant linked to fossil-fuel combustion and industrial emissions.
How do LoRaWAN SO₂ sensors transmit data?
They sample the gas concentration, encode the value in a compact uplink payload, and send it over LoRaWAN to a gateway and network server. Because LoRaWAN is low-power, many units run for long periods on batteries or solar.
What should I compare when choosing an SO₂ sensor?
Check the measurement range and accuracy, sensor type and drift/calibration needs, battery life, IP enclosure rating for outdoor use, supported frequency plans (such as EU868 or US915), and whether a payload decoder is provided.