LabSen
®
553 Professional Spear pH/Temp. Electrode
User Manual
Backed by proprietary Swiss sensor technology and materials, the LabSen 553 Professional Spear
Combination pH Spear Electrode is designed for testing soil directly.
•
Long-Life Reference System – composed of a glass tube, AgCl and a reference silver wire. The
top end of the slim glass tube is stuffed with cotton, which prevents the reaction between AgCl
and electrolyte when temperature changes. It improves the stability of reference electrode and
prolong the service life of the electrode.
•
Polymer Electrolyte – The solid polymer electrolyte makes the electrode hard to be
contaminated and maintenance-free.
•
Built-in Temperature Sensor
•
Special Glass Membrane – The LabSen 553 pH electrode adopts a spear sensor tip, which is
ideal for directly testing semi-solid/solid samples like soil.
1. Technical Data
Measuring Range
（
0-14
）
pH
Electrolyte
3M KCl
Temperature Range
（
0~60
）
℃
Soaking Solution
3M KCl
Shaft Material
PVC Plastic
Electrode Dimension
Electrode
（
Φ15×90
）
mm
Measuring Tip
（
Φ6×25
）
mm
Membrane Shape
Conical
Reference
Long Life
Connector
BNC+RCA
Junction
Single Pore
Cable
Φ3×1m
2. Usage and Maintenance
2.1
After long time exposure in air, Polymer electrolyte will cause shrinkage. It will not happen in
measurement status. The electrode must be soaked in 3M KCl solution for storage.
2.2
The transparent polymer gel electrolyte will inflate and ooze out a bit when it’s soaked in KCL
solution. This will not affect the measurement of the electrode, and it will happen more frequently
with newer electrodes. This is actually a “self-clean” function especially when the junction gets
contaminated. Just wipe off the inflated gel with clean tissue and continue to use the electrode as
normal.
2.3
The electrode’s measuring tip should be soaked in the soaking bottle containing storage solution to
keep the membrane hydrated and junction unblocked. When measuring, please unscrew the bottle cap,
pull out the electrode and rinse it with deionized or distilled water. After using, please put the electrode
back into the bottle and screw tight the cap. Clean the bottle and replace the storage solution if the
storage solution gets turbid and mildewed. The electrode should NEVER be soaked in purified water
or buffer solutions for long.
2.4
The connector of the electrode should be kept clean and dry. If contaminated, please clean it with
medical cotton and absolute alcohol and blow dry to prevent the short circuit of the electrode and slow
reaction of electrode.
