Apera Instruments LabSen 211 User manual

LabSen 211 Routine pH Electrode
User Manual
LabSen electrochemical sensors are premium pH electrode with manufacturing technology and key
components imported from Switzerland. LabSen 211 routine pH electrode is suitable for routine use,
especially suitable for high-precision pH measurement of scientific research and quality control.
This probe has following features:
Impact-resist membrane (see the right picture), there is no danger of electrode
breakage during normal use.
Blue gel inner solution, does not flow and will not cause bubble.
Long life reference system, has better stability and service life.
1 Technical Data
Measuring Range
(0-14) pH
Electrolyte
3M KCl
Temperature Range
(-5~100)°C
Soaking Solution
3M KCl
Shaft Material
Lead-free Glass
Electrode Dimension
(Ø12×120) mm
Membrane Shape
Half Ball
Connector
BNC
Reference
Long Life
Cable
Ø3×1m
Junction
Ceramic
2 Usage and Maintenance
2.1 Connect BNC plug to the input on the pH meter.
2.2 When measuring, please unscrew the sleeve 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.
2.3 Prior to measurement, remove the rubber plug to maintain pressure of the reference solution,
keep consistent flow rate of reference solution and stable potentials of junction.
2.4 After a period of usage, the reference solution will running low. Whenever the level falls to 1/2
height of the electrode, add 3M KCL solution to the refilling hole by using syringe or pipette.
2.5 The connector of the electrode should be kept clean and dry. If being 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.
Before pulling out or putting back the electrode, make
sure to fully loosen the blue cap on the storage sleeve so
that the electrode can move in and out smoothly.

2.6 The electrode’s measuring tip should be soaked in the storage sleeve containing 3M KCL
storage solution to keep the membrane hydrated and junction unblocked. Clean the sleeve and
replace the storage solution if the storage solution gets turbid or mildewed. The electrode should
never be soaked in purified water or buffer solution for long.
2.7 Please avoid measuring dehydrated medium like strong acid or alkaline solution, absolute ethyl
alcohol and concentrated sulfric acid. In case of measuring such solution, please try to reduce
the immersion time and clean it carefully after use.
2.8 After 1-year of use, we recommend replacing the electrode for best accuracy.
3 Limited Warranty
We warrant this electrode to be free from defects in material and workmanship and agrees to repair
or replace free of charge, at option of APERA INSTRUMENTS (Europe) GmbH, any malfunctioned
or damaged product attributable to responsibility of APERA INSTRUMENTS for a period of six
months. Warranty period is the time limit to provide free service for the products purchased by
customers, not the service life of the tester or electrodes.
This limited warranty does not cover any damages due to:
I. transportation;
II. storage;
III. improper use;
IV. failure to follow the product instructions or to perform any preventive maintenance;
V. modifications;
VI. combination or use with any products, materials, processes, systems or other matter not
provided or authorized in writing by us;
VII. unauthorized repair;
VIII. normal wear and tear; or
IX. external causes such as accidents, abuse, or other actions or events beyond our reasonable
control.
APERA INSTRUMENTS (Europe) GmbH
Wilhelm-Muthmann-Str. 15
42329 Wuppertal Germany
Tel.: [phone]
Email: [email protected]
www.aperainst.de