Description
LE621 is a galvanic dissolved oxygen sensor fitted with an NTC temperature sensor and a 1 m cable for laboratory dissolved oxygen measurement. The galvanic DO design works together with the integrated NTC element so that temperature information is available alongside oxygen readings on compatible instrumentation. The fixed 1 m cable length supports convenient placement between sample and meter on the bench without an excessively long lead. Supplied as a single piece, the sensor has a net weight of 0,099 kg and a matching gross weight of 0,099 kg, reflecting a compact laboratory probe format. This LE621 galvanic DO sensor from manufacturer Mettler-Toledo OnLine is intended for dissolved oxygen work where an NTC temperature sensor and a one-metre cable are required. Its straightforward galvanic construction and integrated temperature sensing make it suitable for routine laboratory DO setups that need a ready-to-connect probe with defined cable length and combined oxygen–temperature capability in a single unit.
This article is part of pH electrodes & sensors, in pH & electrochemistry.
Key features
- Pack size: 1 pc
- Type: Galvanic dissolved oxygen sensor
- Temperature sensor: NTC
- Cable length: 1 m
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Questions about DO sensor LE621
What is this article?
DO sensor LE621 is the article on this page. Luminix Health distributes Mettler-Toledo OnLine 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.
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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.
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