title: Using single Time Series per Device containing multiple sensors in Azure Timeseries Insights
body: <p>We are using Azure TimeSeries Insights to store time series from various sensors from our devices.
  In order to faciliate querying of multiple related sensors at once i only use the deviceId (from IoT Hub) as a TimeSeries Id.
  This works for my backend queries and i can use the filter expression to filter by sensor id.</p>
  <p>The only downside i discovered was that i am losing support for TSI Explorer because my value property in a time series contains values from multiple sensors. Display as a single graph makes no sense.</p>
  <p>I thought maybe i can use the TSI Model to create fields which filter by sensor id so i get the same experience in TSI Explorer as if i would use a time series per device and sensor. But i didn't figure out how to do so.</p>
  <p>So my questions are:</p>
  <ul>
  <li>Does the approach of merging multiple sensors of a device in a single time series have any downsides (besides the apparently lost TSI Explorer support) ?</li>
  <li>Is there a way to model the Time Series to get back TSI Explorer support back again?</li>
  </ul>