Description
LabSen 221 pH electrode for viscous and low-concentration solutions is a specialised laboratory sensor engineered for reliable pH measurement in challenging sample matrices. Featuring a LabSen S-type hemispherical glass membrane with low resistance, the electrode delivers fully stabilised readings within 15 to 30 seconds while offering markedly higher mechanical robustness than conventional glass bulbs. A movable sleeve junction allows the electrolyte outflow rate to be adjusted to match the ionic strength of the sample, improving performance in viscous media and low-ion solutions and facilitating easy cleaning. The long-life reference system is compatible with TRIS buffers, and the lead-free special-glass shaft measures Ø12 × 130 mm. Equipped with a BNC connector and 1 m cable, it works with standard pH meters; no built-in temperature sensor is included, so ATC requires a separate probe or manual temperature entry. Measuring range is 0–14 pH with 3 M KCl reference electrolyte and recommended operating temperature of –5 to 100 °C. This electrode from manufacturer APERA Instruments is well suited to titration and demanding biotech or chemical applications.
This article is part of pH electrodes & sensors, in pH & electrochemistry.
Key features
- Pack size: 1 pc
- Product type: pH electrode
- Measuring range: 0–14 pH
- Dimensions: Ø12 × 130 mm
- Junction: Movable sleeve
- Reference electrolyte: 3 M KCl
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Questions about LabSen 221 pH electrode for viscous and low-concentration solutions
What is this article?
LabSen 221 pH electrode for viscous and low-concentration solutions is the article on this page. Luminix Health distributes APERA Instruments for laboratory use. It sits in pH electrodes & sensors, inside pH & electrochemistry, in Lab instruments.
A pH electrode is a glass membrane and a reference. It is a consumable: the glass ages, the junction clogs, and the reading drifts. A refillable electrode and a gel electrode differ in how they are maintained. The connector has to match the meter. The electrode, not the meter, is usually what is wrong.
A pH meter is a voltmeter on a glass electrode. The voltage tracks hydrogen-ion activity, and the electrode is converted to pH only after it is adjusted with buffers of known value. Conductivity measures how well a solution carries a current, which for dilute salts tracks concentration. Dissolved oxygen and titration are further electrodes on the same idea: a sensor, a standard, and a reading that is only as fresh as the calibration. Buffer values and chemical identity sit on PubChem. Accreditation of the calibration laboratory is the field of BELAC and EURAMET.
Which category should I open next?
The category is pH & electrochemistry. The sub-category is pH electrodes & sensors. The catalogue is Lab instruments.
Shelves beside this one are pH meters, Conductivity meters & cells, Dissolved oxygen & multiparameter meters, Titrators & electrochemistry systems and pH & electrochemistry accessories.
What should I check before I order?
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The seven catalogues are Labware, Lab chemicals, Lab instruments, Lab consumables, Chromatography equipment, Lab safety equipment and Life Science & Microbiology.