Hanna. At the cost of a few rolls of pH litmus paper, you can now have the industries latest electronic pH tester. Checker® supplies you with fast and accurate readings on a large LCD, and unlike other pH testers its electrode can be changed and any pH electrode of different shape or size can be used. The extended Checker® family now includes standard gel-filled electrodes with built-in BNC or screw-type connectors. Comes complete with electrode, 2 x 1.4V batteries and instructions. Features: * Range: 0.00 to 14.00 pH * Resolution 0.01pH * Accuracy (@ 20 1/4C/68 1/4F): +/-0.2 pH * Typical EMC Deviation: +/-0.1 pH * Calibration: Manual 2 points through trimmers * Battery Type/Life: 2 x 1.4V / 3000 hours approx. continuous use * Environment: 32 to 122 1/4F (0 to 50 1/4C); RH 95% * Dimensions: 2.6" x 2" x 1" (66 x 50 x 25mm) * Weight: 2.5 oz. (70 g.)