Hardgrove Grindability Index Mechanical to Digital Counter Retrofit Kit

This kit upgrades the older style HGI machines to the new style counters.  The old style had a mechanical counter that is no longer available.  This retrofit is the entire counter box assembly that includes the digital counter a solid state relay and a proximity sensor.  It is a drop in replacement that is placed on the existing mechanical counter mounting holes.  Wiring and adjustment instructions are included.