Indoor temperature gauge

Who it’s for

Facility managers, building managers, and smart home owners ask “where does the current temperature sit within the full expected range for this space?” A radial gauge communicates both the absolute value and its position within the comfort envelope in a single glance.

What it does

A sensor reporting temperature = 21°C positions a needle on a radial gauge spanning 0–40°C, with the arc divided into three highlight zones: blue for Cold (0–18°C), light green for Comfortable (18–24°C), and red for Hot (24–40°C).

• Radial gauge positions the needle within the full 0–40°C operating range for immediate context
• Color-coded arc zones show Cold, Comfortable, and Hot bands without requiring the viewer to read the scale
• Shows one sensor’s reading per widget; add multiple widgets to monitor different rooms or zones

How to set up

Data keys

Key	Role	Type	Description
temperature	Gauge value	Timeseries	Indoor temperature in °C; change the key name to match your device’s telemetry key

The widget ships with a simulated function datasource key labeled Temperature, 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 (°C)	Level	Color
0–18	Cold	Blue
18–24	Comfortable	Green
24–40	Hot	Red

How to customize

• To change the gauge range — open the widget settings and adjust the minimum and maximum values to match your expected temperature range.
• To change the comfort thresholds — adjust the arc zone boundaries in the widget settings.
• To change the zone colors — edit the color for each zone in the widget settings.

Tips

• A needle sitting in the blue zone with the HVAC in heating mode tells an operator immediately whether the system is working; a needle deep in the red zone alongside a Heat call confirms the space cannot keep up, pointing to insufficient heating capacity or excessive heat gains.
• The gauge’s analog format is intuitive for non-technical occupants on a lobby kiosk display — they understand “in the green zone” without needing to know that 21°C is the setpoint.
• For server rooms and cold storage, adjust the comfort zone boundaries to match the required operating range (for example, 18–27°C for a server room) so the gauge highlights any exceedance of the actual thermal envelope.