The HI12963 features a general purpose (GP) glass ball tip, titanium body, and removable fiber junction with gel electrolyte. 
Glass formulation for general use
General purpose glass (GP) is a standard formulation of glass used for general applications. A GP glass-tipped pH electrode has a resistance of 100 megaohms at 25 ° C and is suitable for pH measurement of samples at room temperature. HI12963 is suitable for analyzing samples at temperatures between 0 and 80 ° C. 
Spherical tip
The ball tip is suitable for general use. Other types are also available such as conical tip for penetration and flat tip for surfaces. 
Titanium body
A titanium body has greater immunity to electrostatic and magnetic fields. It is also very resistant to corrosion, even in seawater. 
Extractable fiber junction
The fiber splice is often found in gel electrolyte electrodes. The advantage of this type of joint is that it can be removed from the probe and renewed. 
Quick DIN connector
HI12963 is equipped with a Quick DIN connector which makes it easy to connect and remove the probe. This type of connector is compatible only with some specific tools.