_:nab46b5cb9bc24b09bd4d6aa78ae694b7xb0
<http://schema.org/description>
"The interval can be adjusted from 30 seconds up to 3 minutes. In addition to precision speed control, a limiter will also assure that the maximum speed will never be exceeded (Speedsafe)."
<https://www.ereinc.com/products/auto-reverse-magnetic-stirrers-with-tachometer>