DIGITAL PH METER

Digital ph meter (portable) battery operated with combination ph electrode. Digital ph meter 3 ? digit LCD display with combination ph electrode (table model) AC/Battery operated.Digital ph meter with 3 ? digit LED display, only ph dislay auto temperature compensations, ph electrode & RTD probe (table model) Deluxe ph meter 3 ? digit LED display with auto temperature compensations, combination ph electrode & RTD probe (table model).