Indicator electrodes and reference electrodes combined into 1 are referred to as composite electrodes.

At our company we have glass-reference composite electrodes, silver reference composite electrodes, and platinum reference composite electrodes.
They are all functionally similar, but they should have the following features and points of caution.

【Features】
Because a maximum of 3 electrodes will fit into the electrode holders, when conducting various titrations on the same sample the electrodes may not fit in place.
In such cases it is convenient to use composite electrodes.

【Important point】
・When an electrode is damaged it is replaced 1 individual electrode at a time, but composite electrodes are replaced 2 at a time.
・In measurement of non-aqueous neutralization values, etc. the liquid may enter into a composite electrode so please avoid using composite electrodes.
・The sleeve of composite electrodes cannot be washed (excluding GR-511B).