ST-47 Groundhog Vehicle Static Ground Proving Unit

-Self-proving technology based on Scully’s original patented design
-Can operate in conjunction with your Scully Overfill Prevention System (ST-35® or ST-15) or as an independent ground verification unit
-Immediately shuts down the loading operation if proper static grounding is not detected

https://scully.com/product/st-47-groundhog-static-grounding-monitor/