Oakton Waterproof pHTestr 10
Replaceable double junction electrode. Use Testr® body many times over, which saves you money. It features Automatic Temperature Compensation (ATC), push-button three-point calibration, microprocessor-based, auto buffer recognition, hold function, auto-off, error messages and it is certifiable to IP67 standards. The pH range is 1.0 to 15.0 pH.