... or NPN) 4/6/8 digits display. 6 digits Multimeter for Height/Position/Length/Counting Features: 1, Various wave form pulse input ... available;widely used in line of machinery,food,package,etc for measuring not only height,location,length,counting,etc.,but also ... :6 digits display,sensor power supply 12V/24V/30mA available.For 8 digits display ,please indicate when ordering.5, RS232 or ...