(Deutsch) Glass-lined Probes

For highest process standards

Redox probe type rH

The rH sensor type accurately measures the redox value in applications where conventional probes are unstable and feature 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 redox potential is measured between a rhodium electrode embedded in the enamel and a pH enamel reference electrode. The magnitude of the potential occurring at the reference electrode depends on the pH value of the product. Thus, a redox voltage is obtained which is not dependent on the pH value.

The rH probes are available in rod design with different lengths.


Find more probes in the Pfaudler Product Selection Guide

Technical data – Product overview

Type rH
Measuring range -1,200 to +1,500 mV
Operating temp. 0 to +140 °C **
Operating pressure -1 to +40 bar **
Ex. protection II 1/2 G EEx ia IIB T6 or
II 2G EEx ia IIC T6
Dimensions (mm) L = 300 – 3,200 *
DN = 50 – 200 *
Product benefits – Heavy-Duty Design
– Highly restistant glass layer
– Maintenance-free
– No diaphragm
– No electrolyte required
– CIP/SIP-compliant
– Self-cleaning

* Other dimensions on request
** Higher pressure/temperature on request