A Thermometer widget is a simple status indicator that displays a thermometer which indicates a certain temperature level. The temperature level within the thermometer is a visual representation of a single metric value. This type of widget is ideal for tracking progress toward a goal. Like the Gauge and Cylinder widgets, this type of widget is designed to display the value of a single metric.
In the image below, the thermometer level represents the number of units sold.
A Thermometer widget is usually combined with an interactive selector so you can choose an attribute element for which to display a metric value in the thermometer. For example, you can select the year 2008 from a selector or report to update the widget with a related metric value.