I am having a hard time finding a good and widely recognizable icon for Sensors. The icon needs to look good at small sizes (16x16 px.) A thermometer icon, while it is widely recognizable, probably would not work because this icon represents temperature, voltage, current, and power sensors.

closed as off-topic by tohster, JonW Jun 24 '15 at 15:48

This question appears to be off-topic. The users who voted to close gave this specific reason:

  • "Questions requesting Icon Suggestions are off topic. While the subject of icons is on topic, there's very little value in soliciting suggestions for a specific icon in a specific context. See this meta post for more information about this topic." – tohster, JonW
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The closest you can get to a universal symbol for "sensor" might be a large dot/point and some waves moving away from it. Example

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