The Milwaukee MA923D/1 Amplified pH/ORP/Temp replacement probe for Milwaukee Mi106 pH/ORP/temp meter. The MA923D/1 has a rugged body (Epoxy) designed to take hits, comes with a 1 meter (3') cable and DIN connector (meter(s) sold separately).
The probe connects quickly and tightly with a DIN connector. No worries of slipping off.