Glass-lined pH Probes

Long-lasting and low-maintenance

pH probe type 03

The pH sensor type 03 accurately measures pH in applications where conventional glass probes are unstable, drift and have a short service life. The Pfaudler Heavy-Duty Design allows it to be installed in-line directly in the product flow. The wear-resistant, smooth glass-lined layer uses the product flow to keep the surface of the sensor clean while resisting any potential product build up that may occur. The pH probe is available in different lengths (as rod probe) and also as a ring probe.


Find more probes in the Pfaudler Product Selection Guide

Technical data – Product overview

Type pH 03 N/K/ Rod & Ring
Measuring range Linear: 0 to +10 pH *
Application: -2 to +14 pH **
Operating temp. 0 to +140 °C ****
Operating pressure -1 to +9 bar ****
Ex. protection II 1/2 G EEx ia IIB T6 or
II 2G EEx ia IIC T6
Dimensions (mm) Rod-probe:
L = 300 – 3,200 ***
DN = 50 – 200 ***
DN50 / DN80 ***
Product benefits – Heavy-Duty Design
– Highly resistant glass layer
– Low-maintenance
– No ageing / No drift
– Extremely long service life

* Depends on temperature
** Depends on alkali error
*** Other dimensions on request
**** Higher pressure/temperature on request