Apera Instruments LabSen 821 User manual

LabSen 821 Food pH Electrode
User Manual
LabSen electrochemical sensors are premium pH electrodes with manufacturing technology
and key components imported from Switzerland. LabSen 821 food pH electrode is ideal for
protein-containing dairy products, beverages, and liquid food.
This probe has following features:
l Impact-resistant membrane (see the right picture)，there is no danger of
electrode breakage during normal use.
l Protelyte reference solution does not react with protein; 3 ceramic pores
reduce the possibility that the junction could be blocked.
l Blue gel inner solution, does not flow and will not cause a bubble.
l Long life reference system, and silver ion trap reference prevent the
contamination of the junction when testing samples containing sulfides and
proteins, which helps to improve the stability and service life of the electrode.
1. Technical Data
Measuring Range
（0-14）pH
Electrolyte
Protelyte
Temperature Range
（-5~100）℃
Soaking Solution
Protelyte
Shaft Material
Lead-free Glass
Electrode Dimension
（Φ12×120）mm
Membrane Shape
Half Ball
Connector
BNC
Reference
Silver Ion Trap
Cable
Φ3×1m
Junction
Ceramic x 3
2. Usage and Maintenance
2.1 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.
2.2 After a period of usage, the reference solution will run 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.
2.3 The connector of the electrode should keep 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.
2.4 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 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 solution for long.
2.5 After 1-year of use, we recommend replacing the electrode for best accuracy.
APERA INSTRUMENTS, LLC
Address: 6656 Busch Blvd, Columbus, OH 43229 Phone: [phone]
Website: www.aperainst.com Email: [email protected]

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, LLC, any
malfunctioned or damaged product attributable to responsibility of APERA INSTRUMENTS,
LLC 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.