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4.6
Manually adjust temperature
In MTC mode, long press
key to enter temperature regulation mode. Press
or
key
to adjust temperature value. Press and hold the key for fast adjustment. Press
key to confirm
and return to measurement mode.
5
pH measurement
5.1
pH Electrode Information
The meter comes with a LabSen 211 pH combination electrode and MP500 temperature probe,
which enables the automatic temperature compensation. The LabSen pH electrodes are made with
proprietary sensor technologies and premium materials from Switzerland. LabSen 211 pH electrode
is designed for high-precision lab and field pH measurement of general water solutions. The
electrode is compatible with TRIS buffers.
For testing pH of special samples such as viscous (sticky), strong acidic or alkaline solutions,
solutions at high or low temperature (>50˚C or <10˚C), solid samples, turbid solutions, low ion-
concentration solutions & etc…specialized pH electrodes are necessary in order to achieve reliable
results. Regular pH electrodes in these special applications usually would generate inaccurate and
unstable measurements, and may be damaged by the samples, or even be non-applicable for
testing at all.
Please refer to Section 10 for ideal pH electrodes to use for other specific applications.
5.1.1 Features of LabSen 211 pH Electrode
⚫
Built with LabSen S-type hemispherical glass membrane, featuring low resistance (fast response)
and high firmness
⚫
No more air bubbles inside the glass membrane thanks to the Swiss blue gel electrolyte.
⚫
The long-life reference system significantly increases measuring stability and extends service life.
5.1.2 Technical Specifications of the LabSen211 pH Electrode
Measuring Range
0-14 pH
Junction
Ceramic
Temperature Range
23 to 212 ˚F (-5 to 100
°C)
Reference Solution
3M KCL
Membrane Types
S
Soaking Solution
3M KCL
Body Material
Lead-free Glass
Membrane Resistance
<150 MΩ
Reference
Long Life
Electrode Dimension
(Φ12×120) mm
Connector and cable
length
BNC/1m
