Horizontal ozone (O3) card

Who it’s for

Environmental health officers, air quality managers, and smart city operators ask “can I compare ozone across several stations without losing the severity colors?” The horizontal layout is designed for dashboards where vertical space is limited and multiple readings must share a narrow column.

What it does

A monitoring station reporting ozone = 65 µg/m³ displays the color-coded reading in a wide, low-height card: green for Good (0–50 µg/m³), light green for Moderate (50–100 µg/m³), orange for Elevated (100–130 µg/m³), dark orange for High (130–240 µg/m³), and red for Hazardous (above 240 µg/m³). The horizontal format lets you stack many sensors in a narrow sidebar without scrolling.

• Live O₃ reading in µg/m³ with color coding across five severity bands
• Compact horizontal layout fits more sensors in a narrow column than a square card
• Shows one sensor’s reading per widget; stack multiple widgets to display a full station network in a single sidebar

How to set up

Data keys

Key	Role	Type	Description
ozone	Main value	Timeseries	Ozone 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 Ozone, 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	Level	Color
0–50	Good	Green
50–100	Moderate	Light Green
100–130	Elevated	Orange
130–240	High	Dark Orange
240+	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 ppb.

Tips

• Stack horizontal O₃ cards in a sidebar next to a regional map so operators can see which urban and suburban stations are elevated at the same time, since ozone often peaks at locations downwind of city centers.
• Include both urban traffic stations and rural background stations in the list to help operators distinguish local photochemical production from transported regional ozone.
• For compliance reporting, pair this card with an O₃ chart card so inspectors see both the current reading and the daily trend without switching views.