Simple volatile organic compounds chart card with background

Who it’s for

Indoor air quality managers, building managers, and health and safety officers ask “how has VOC concentration trended here recently?” The simple chart with background combines compact trend visualization with a full-card color signal readable from a distance.

What it does

A sensor reporting voc = 320 ppb renders a time-series trend chart on a card whose background color reflects the current severity: green for Good (0–500 ppb), orange for Moderate (500–1000 ppb), and red for Hazardous (above 1000 ppb).

• Full-card background color communicates current severity at a glance from a distance
• Trend chart of VOC concentration over the selected dashboard time window
• Shows one sensor’s data per widget; add multiple widgets to compare trends and current status across rooms

How to set up

Data keys

Key	Role	Type	Description
voc	Chart series	Timeseries	VOC concentration in ppb; change the key name to match your device’s telemetry key
Latest	Latest value	Timeseries	The headline figure above the chart. Its own color ranges are where the band colors are edited

The widget ships with a simulated function datasource key labeled VOCs, 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
0–500	Good	Green
500–1000	Moderate	Orange
1000+	Hazardous	Red

How to customize

• To change the time window — adjust the dashboard time filter to show the last hour, day, or week of VOC readings.
• To change the severity thresholds — edit the color ranges on the Latest data key to match your organization’s indoor air quality policy.
• To change the background colors — edit the color of each range on the Latest data key.

Tips

• On a wall display, the colored background signals the current VOC severity from across the room while the embedded chart shows whether post-cleaning levels are declining toward the Good band or still rising.
• Use consistent severity colors across all indoor air quality widgets so facilities staff can interpret a red background anywhere on the dashboard without reading the label.
• VOC levels that cycle between Moderate and Good throughout the day — rather than remaining steadily in the Good band — indicate a chronic low-level source such as poorly ventilated storage of cleaning products or adhesives that requires source removal rather than just ventilation.