RADIOMETER ABL90 FLEX - Construction of the Ph and Electrolyte Sensors; Diagram; Parts and Description

ABL90 FLEX reference manual 5. Sensors and optical system
5-17
Construction of the pH and electrolyte sensors
The pH and electrolyte sensors are of solid-state design with a H
+
, K
+,
Na
+
and
Ca
2+
sensitive PVC membrane. The Cl
–
sensor is of solid-state design with a Cl
–
sensitive epoxy membrane.
The pH sensor is used as an example:
3
1
4
1
2
3
4
Item Part Description
1 Membrane Ion-selective membrane that is in direct
contact with the sample or calibration
solution and that is sensitive to a specific ion,
e.g. the H
+
ions.
2 Solid-state
contact
The point of electrical and ionic contact with
the membrane.
3 Electrical contact The point of electrical contact between the
sensor and the analyzer.
4 Electrode base The structural platform on which the
electrode is formed.
Diagram
Parts and
description