The HI763063 is a two-ring probe for use with the HI9930) and HI99301 Portable EC Meters.
— EC and resistivity probe for HI98197 - HI763123
4-Ring Conductivity Probe, DIN Connector - HI76302W —
The HI763063 is a two-ring probe for use with the HI9930) and HI99301 Portable EC Meters.