Apera Instruments LabSen 841 User manual

LabSen®841 Strong Base pH Electrode

User Manual

LabSen®electrochemical sensors are premium pH electrodes backed by proprietary sensor

technologies and components from Switzerland. LabSen 841®pH Electrode adopts a special H glass

membrane, ideal for strong base solutions, and solutions with high temperature.

This probe has following features:

Impact-resistant membrane (see the right picture), there is no danger of electrode

breakage during normal use.

Tested in high temperature and strong base conditions, the service life of the probe

is 5 times longer than normal electrodes (test condition: 60℃, 1M NaOH solution).

Blue gel inner solution, does not flow and will not cause a bubble.

Silver ion trap reference prevents the contamination of the junction when testing

samples containing sulfides and proteins.

1. Technical Data

Measuring Range

（2-14）pH

Electrolyte

3M KCL

Temperature Range

（0~100）℃

Soaking Solution

3M KCL

Shaft Material

Lead-free Glass

Electrode Dimension

（Φ12×120）mm

Membrane Shape

Cylindrical

Connector

BNC

Reference

Silver Ion Trap

Cable

Φ3×1m

Junction

Ceramic

2. Usage and Maintenance

2.1Measurement suggestions:

(a) The electrode can measure strong base solutions lighter than 1mol/L (pH=14), with good

repeatability and stability. Stirring is recommended while measuring to speed up stabilization.

(b) Rinse the probe with deionized or distilled water after each measurement and store it in 3M KCL

solution.

Users may use 1% HF solution (about 0.5mol/L) to soak the probe for 5-8 seconds, then soak in

3M KCL solution for more than 2 hours, and then rinse with deionized or distilled water to

recondition the probe.

2.2The 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.

2.3The electrode’s measuring tip should be soaked in the soaking bottle containing 3M KCL soaking

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 solution for long.

3. Limited Warranty

We warrant this electrode to be free from defects in material and workmanship and agree 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 from

the delivery.

This limited warranty does not cover any damages due to:

Transportation, storage, improper use, failure to follow the product instructions or to perform any

preventive maintenance, modifications, combination or use with any products, materials, processes,

systems or other matter not provided or authorized in writing by us, unauthorized repair, normal wear

and tear, or external causes such as accidents, abuse, or other actions or events beyond our

reasonable control.

APERA INSTRUMENTS, LLC

Address: 6656 Busch Blvd, Columbus, OH 43229 Phone: 1-614-285-3080

Website: www.aperainst.com Email: info@aperainst.com

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