Apera Instruments, AI3151, LabSen 241-3SP Micro pH Electrode for Micro-Volume Solutions Containing ProteinsFeatures:Proprietary pH sensor technology and premium materials from SwitzerlandLow-resistance LabSen® micro cylindrical glass membrane, suitable for micro-volume pH measurement (>30 microliters)Protelyte electrolyte made for protein-containing solutions such as serum and microbiological samples.The stainless steel protective shaft ensures the durability of the slim glass tubeLong-Life Reference System, improving the stability of the reference and extends the electrode's service lifeWith the micro container (sold separately), it can test as low as 15 microliters.LabSen 241-3SP Glass Micro pH Electrode is designed for micro-volume samples (≥30 microliters) containing proteins such as serum and microbiological samples. Unique Glass Membrane - LabSen 241-3SP pH electrode adopts a micro cylindrical sensor tip (top end ø3mm, stainless steel ø4mm), making micro-sample pH testing easier than ever, and can be tested in high-temperature samples (up to 212°F. The stainless steel protective shaft 4mm) ensures the durability of the slim glass tube.Protelyte electrolyte - A specialized oily reference solution made for protein solutions and viscous samples.Long-Life Reference System - composed of a glass tube, AgCl, and a reference silver wire. The top end of the slim glass tube is stuffed with cotton, which prevents the reaction between AgCl and electrolyte when the temperature changes. It improves the stability of the reference system and extends the electrode's service life.The electrode uses a BNC connector, compatible with any pH meters that use BNC connectors. No temperature sensor is built-in. Users need to have a separate temperature probe to enable ATC or manually input temperature to achieve temperature compensation.