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SR20D-AP24橫河傳感器

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產(chǎn)品名稱：SR20D-AP24橫河傳感器產(chǎn)品型號(hào)：SR20D-AP24 生產(chǎn)廠商：橫河YOKOGAWA 產(chǎn)品數(shù)量：不限產(chǎn)品單價(jià)：電議

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SR20D-AP24橫河傳感器

SM21/SR20/SC21工業(yè)電極

SR20

SR20 Single Reference Electrodes (non-flow)

The selection of the correct type of junction of a reference electrode depends on the process conditions under which this electrode has to function. The following junction types are available: 1. Ceramic junction.

2. Glass sleeve capillary element.

3. P.T.F.E. junction.

The purpose of the junction is to maintain contact between the reference system in the electrode and the process liquid. When selecting the correct junction consideration has to be given to ensure that the process liquid does not penetrate into the electrode causing poisoning and a consequential unstable liquid junction potential.

With the first two types of junction listed above the KCI solution flows slowly into the process. The flow rate is dependent on the over-pressure in the electrode and on the process temperature. The electrolyte flow rate increases with increasing temperature.

For use in very dirty liquids a glass sleeve capillary element is preferred because of its larger flow surface. The sleeve can be easily cleaned by first moving the ground ring upwards and then wiping the ground faces. Non-flowing reference electrodes with a porous P.T.F.E. junction can also be used in many dirty liquid applications. The dirt resistant properties of P.T.F.E. will prevent complete fouling of the diaphragm.

A non-flow type reference electrode can be used for processes that don’t contain components that poison the reference system. The gel-type electrodes have a large area of porous PTFE junction for optimal resistance against electrode pollution. The SR20-AP26 electrode is the optimal choice for processes that cannot stａnd contamination with KCl. The SR20-AC22 electrode has a flexible PTFE tube. Therefore this electrode can be applied in processes with frequent temperature- and pressure fluctuations.

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