Ship type floating design, P67 waterproof grade;Easy operation with 4 keys, comfortable holding, accurate ORP/temperature measurement with one hand;Wide range of applications: can meet the laboratory and field measurement needs;Self-replaceable flat platinum ORP electrode; Quick response; Accurate measurement;Can be cast water quality measurement (automatic locking function);Maintenance is simple, the battery and electrode can be easily replaced without any tools;Backlit screen, multi-line display, easy to read;Electrode performance state self-diagnostic display;Automatic shutdown after 20 minutes without key action.