Many different application conditions require the use of appropriate, specifically designed pH sensors. For your application, you can select the electrode with the optimal pH glass and diaphragm.

pH glasses

SCHOTT electrodes are manufactured with various pH glasses. These have been optimised for your application and offer a high degree of measuring accuracy and reliability. Select the pH glass for your application:

pH glasses
N-Glass	for general applications across the whole pH range
A-Glass	with short response time in drinking water, service water and waste water; for general application and in media with low ion content
L-Glass	for low temperatures and general applications
H-Glass	for high temperatures, in acid and alkaline range, even with high sodium-ion concentrations
S-Glass	in hot alkaline media with good reproducibility and short response time

An important factor for a reliable and reproducible pH measurement is the selection of an electrode with a suitable diaphragm:

Diaphragm
Platinum Diaphragm	Diaphragm[?] universal, shows its strengths especially with solutions containing solids and at extreme pH values and temperatures. It is ideal for titrations and very insensitive to stirring
Ceramic Diaphragm	robust for general applications, low electrolyte outflow rate
Ground joint diaphragm	preferred for liquids with high solids contents, easy to clean
Fibre diaphragm	for robust, low-maintenance electrodes. Preferred for general applications and field measurements
KPG annular gap diaphragm	on minimum-maintenance electrodes, with symmetric annular gap, insensitive to soiling