Extech PH220-S  

Extech PH220-S: Waterproof Palm pH Meter with Temperature

Compact size pH meter with stick pH electrode

Extech PH220-S pH Meter, Palm pH with Stick Electrode. Unit is completely waterproof when electrode is connected to the meter. Microprocessor provides for Automatic Buffer recognition. Memory stores 25 readings. Includes stick pH electrode, protective holster, pH buffers and 9V battery.