60120B - Mini pH Electrode (10x120mm) General purpose mini size pH electrode built with rugged, polycarbonate construction features glass pH sensing bulb surrounded by protective teeth for bulb protection against breakage
601500 - Standard pH Electrode (12 x 160mm) General purpose pH electrode built with rugged, polycarbonate construction features glass pH sensing bulb surrounded by protective teeth for bulb protection against breakage
6015WC - Waterproof pH Electrode with cable for Palm pH For use with PH220 Palm pH meter - rugged, polycarbonate construction with special 4-wire waterproof connector and 39" (1m) cable feature glass pH sensing bulb surrounded by protective teeth
6012WS - Waterproof Stick Type pH Electrode for Palm pH For use with PH220 Palm pH meter - rugged, polycarbonate construction with special 4-wire waterproof connector features glass pH sensing bulb surrounded by protective teeth