YSI PH10A PH Meter,0.00 to 14.00pH EcoSense PH Meter,0.00 to 14.00pH pH Meter, pH Range 0.00 to 14.00, Waterproof IP67, Automatic Temperature Compensation Auto 0.0 Degrees to 100.0 Degrees C or 32.0 Degrees to 212 Degrees F, Displayed Temperature Range 0.0 Degrees to 100 Degrees C, Display Digital, Auto Power Off No, Memory 50 Data Sets, Temperatur...