Indoor horizontal PM2.5 card with background

Who it’s for

Facility managers, building managers, and indoor air quality specialists ask “can I monitor PM2.5 across many rooms in a compact layout where the severity is still instantly visible?” The horizontal background variant combines space efficiency with the full-card color signal.

What it does

A sensor reporting pm2.5 = 18 µg/m³ displays the reading in a horizontal card whose entire background fills with the severity color: light green for Good (0–35 µg/m³), orange for Moderate (35–75 µg/m³), and red for High (above 75 µg/m³).

• Full-card background color makes PM2.5 severity readable across a room without reading the number
• Horizontal layout fits more rooms per row on a multi-zone air quality dashboard
• Shows one sensor’s reading per widget; tile multiple widgets to monitor all rooms at a glance

How to set up

Data keys

Key	Role	Type	Description
pm2.5	Main value	Timeseries	PM2.5 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 PM2.5, 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
0–35	Good	Light Green
35–75	Moderate	Orange
75+	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 needed.

Tips

• A row of horizontal background cards, one per room, lets the facilities manager immediately identify which spaces have elevated PM2.5 during a building-wide event — such as a diesel generator test or a widespread candle-burning occasion — without scanning individual readings.
• Use consistent severity colors across all indoor air quality widgets: light green is safe, red needs action.
• For health and safety sign-off after activities that generate fine particles (soldering, spray painting, 3D printing), the colored row provides an instant multi-room clearance check before workers are allowed back in.