There are four different types of pH-sensitive membrane glass in the InPro 3250 family. They are indicated by the 4th number in the product name. InPro 3250 uses Highly Alkali Resistant Glass For Tough Conditions (HA Glass) InPro 3251 uses Glass Suitable For Low Temperature (LoT Glass) InPro 3252 uses Hydrofluoric Acid Resistant Glass (HF Glass) InPro 3253 uses Steam Sterilizable Glass (A41 Glass) Each type is suited for different applications, and your METTLER TOLEDO sales representative can support you in deciding which
pH sensor is right for your application.