YSI INCORPORATED (YELLOW SPRINGS INSTRUMENT CO.) CONDUCTANCE-RESISTANCE METER VSI MODEL 34

YSI INCORPORATED (YELLOW SPRINGS INSTRUMENT CO.) CONDUCTANCE-RESISTANCE METER VSI MODEL 34 S/N: 93J09228 120V 60HZ 8W HAS DUAL SENSE DRIVE PORTS AND 1 GUARD DRIVE PORT DUAL RECORDER PORTS AND A 3200 SERIES TEMP PROBE JACK