The term 'Platinum Metallic Electrode Type: PM-55' refers to a specific model of electrode used in scientific and laboratory settings. It is most commonly associated with Karl Fischer (KF) titrators, instruments used to determine the water content of samples. Characteristics and applications Platinum construction: As a metallic electrode, the PM-55 features platinum, a chemically inert and non-reactive metal. This makes it ideal for use in sensitive electrochemical applications like titration. Karl Fischer titration: The electrode is compatible with KF titrators, including common brands like Labindia, Spectralab, Veego, and Analab DBK. In this application, the PM-55 electrode acts as a sensor to detect the endpoint of the titration, a crucial step in accurately measuring a sample's water content. Connectivity options: The electrode is available with different connection types, such as BNC or banana pin, to ensure compatibility with a wide range of laboratory equipment. Manufacturers and suppliersOne specific manufacturer and supplier for the PM-55 electrode is Shree Vissnu Scientific Company, based in Coimbatore, India, which markets the electrode under the brand name Deepvision. Not to be confused with welding electrodesIt is important to note that a 'PM-55' is also a product designation for certain types of cast iron welding electrodes, such as those with a Nickel-Iron core. However, given the 'Platinum Metallic Electrode' descriptor in the query, the context is clearly for a laboratory-grade scientific instrument, not a welding product.