The HI-3214 is an electrode designed for use with the swimming pool monitors. The electrode is constructed with a specially designed fibre salt-bridge making each particularly resistant to clogging in pools.
The electrode can also be used in agriculture or disinfection applications.
The HI3214B uses a BNC connector. This type of connector is universal in that it can be used on any pH meter that has the female BNC probe input. Other type of connectors include DIN, screw type, T-type, and 3.5mm to name a few. These types of connectors tend to be proprietary for a particular type of meter and are not interchangeable.