USD $2.05
Super simple - it's a ball in a tube that plugs into the Grove system to detect tilt.
Just like a normally-open switch, but it's a rolling ball in a tube. Orient it in the plane of motion you want to detect, and it will close when tipped over.
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Warning: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.
Please visit www.P65Warnings.ca.gov for more information. This item was manufactured prior to August 31, 2018.