Horizontal sulfur dioxide (SO2) card

Who it’s for

Environmental health officers, air quality managers, and industrial site managers ask “what is the SO₂ level at this station right now?” They need a compact, space-efficient card that fits into multi-station overview dashboards without dominating the layout.

What it does

A sensor reporting sulfur = 65 µg/m³ displays the reading in a horizontal card whose label and value sit side by side, color-coded by severity: green for Good (0–100 µg/m³), light green for Moderate (100–200 µg/m³), orange for Elevated (200–350 µg/m³), dark orange for High (350–500 µg/m³), and red for Hazardous (above 500 µg/m³).

• Horizontal layout fits more stations per row on a multi-station air quality dashboard
• Live SO₂ reading in µg/m³ with automatic color coding across five severity bands
• Shows one sensor’s reading per widget; tile multiple widgets to monitor all stations at a glance

How to set up

Data keys

Key	Role	Type	Description
sulfur	Main value	Timeseries	Sulfur dioxide concentration in µg/m³; change the key name to match your device’s telemetry key

The widget ships with a simulated function datasource key labeled Sulfur dioxide, so it draws random values until you point the datasource at a device and rename the key.

To point it at your own device: open the dashboard in edit mode, open the widget’s Datasources, pick the entity or entity alias, and replace the function key with the key your device reports.

Value ranges

Range (µg/m³)	Level	Color
0–100	Good	Green
100–200	Moderate	Light Green
200–350	Elevated	Orange
350–500	High	Dark Orange
500+	Hazardous	Red

How to customize

• To change the severity thresholds — edit Icon color ranges and Value color ranges; set the same boundaries in both so the icon and the number always agree.
• To change the band colors — edit the color of each range in Icon color ranges and Value color ranges.
• To rename the units label — change the Units field in the widget settings if your sensor reports in ppm.

Tips

• Use the horizontal layout to fit more monitoring stations per row when building a city-wide or industrial-zone overview; pair with the standard card for stations in high-priority areas where a larger display is warranted.
• SO₂ is a direct marker of combustion emissions; placing horizontal cards for SO₂, NO₂, and CO side by side on the same row makes it easy to confirm that all three combustion-related pollutants are responding to the same source event.
• For regulatory reporting, archive hourly averages from each station; most national frameworks specify compliance limits in terms of 1-hour mean concentrations.