Product Code: HI1271 The Hanna Instruments HI1271 is a replacement pH electrode designed for Hanna's compact Checker and pocket pH meters. It is compatible with the HI98103 Pocket Checker. The electrode can be replaced quickly by unscrewing the old probe and installing the new one. The HI1271 has a slim 8 mm polypropylene body and a small 3 mm spherical sensing tip, allowing it to reach into test tubes and other narrow sample vessels. It uses a single Ag/AgCl reference, an open junction and viscolene electrolyte. Genuine Hanna Instruments replacement electrode Designed for Hanna Checker pH meters 0–13 pH measurement range Single-junction Ag/AgCl reference Viscolene electrolyte Open junction 3 mm spherical sensing tip Slim 8 mm polypropylene body Screw-cap connection No cable required No built-in temperature sensor Suitable for general-purpose and field applicationspH Calibration, pH Storage Solution, pH Cleaning Solution, and Coductivity Solutions are all sold separately.