Horizontal radon level card with background

Who it’s for

Building managers, property owners, and occupational health officers ask “can I monitor radon across many zones in a compact layout where the risk level is still instantly visible?” The horizontal background variant combines space efficiency with the full-card color signal.

What it does

A sensor reporting radon = 45 Bq/m³ displays the reading in a horizontal card whose entire background fills with the risk color: green for Safe (0–100 Bq/m³), orange for Elevated (100–200 Bq/m³), and red for High (above 200 Bq/m³).

• Full-card background color makes radon risk readable across a room without reading the number
• Horizontal layout fits more sensors per row on a building management dashboard
• Shows one sensor’s reading per widget; tile multiple widgets to monitor all zones and floors at a glance

How to set up

Data keys

Key	Role	Type	Description
radon	Main value	Timeseries	Radon concentration in Bq/m³; change the key name to match your device’s telemetry key

The widget ships with a simulated function datasource key labeled Radon level, 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 (Bq/m³)	Level	Color
0–100	Safe	Green
100–200	Elevated	Orange
200+	High	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 background colors — edit the background color for each severity level in the widget settings.
• To rename the units label — change the Units field in the widget settings if your sensor reports in pCi/L.

Tips

• On a building management display, a row of horizontal background cards lets the facilities team see which floor or zone has elevated radon without scanning individual numbers.
• Use consistent severity colors across all indoor air quality widgets: green is safe, red needs action.
• For compliance reporting, pair this card with a radon chart card so inspectors see both the current reading and the historical trend without switching views.