The Milwaukee MA991B/1 is a lab grade single junction, gel filled glass replacement pH Probe for any Milwaukee BNC connector meter  This electrode is designed for the education market, is easy-to-clean and great for students to learn with.  The MA991B/1 has a glass body, high impedance, low maintenance (no refilling required) and is designed for fast accurate response.  It comes with a 1 meter (3') cable, BNC connector and can withstand temperatures to -5 to 70°C (23 to 158°F) (meter(s) sold separately).

The probe connects quickly and tightly with a BNC connector. No worries of slipping off.