The EXO series is the successor of the popular 6-series from YSI.  The EXO3 sonde has ports for 5 sensors (or 4 with a central wiper). It is rated to a depth of 250 meters.

Dutch market only
Please be informed that we – as a reseller – are only allowed to sell/deliver Xylem/YSI and Xylem/SonTek products to the Dutch market.