Glass-lined pH Probes

Long-lasting and low-maintenance

pH probe type 18

The pH sensor type 18 changes the nature of pH measurement by eliminating the need for internal electrolyte solutions and reference junctions. This design virtually eliminates the problems caused by ageing and pollution of the reference sensor. The probes design and the rugged Pfaudler Glasteel™ surface allows them to be directly installed into the process (product flow), thus detecting the pH immediately and directly, without a protective cage.


Find more probes in the Pfaudler Product Selection Guide

Technical data – Product overview

Type pH 18
Measuring range +3 to +12 pH *
Operating temp. 0 to +140 °C **
Operating pressure -1 to +15 bar **
Ex. protection
Dimensions (mm) L = 144
D = 18
Process fittings:
DN25 / DN30
Product benefits – Heavy-Duty Design
– Highly resistant glass layer
– Maintenance-free
– No diaphragm
– No ageing / No drift
– No electrolyte required

* Depends on temperature
** Higher pressure/temperature on request