- 產(chǎn)品描述
burkert電導率儀8222 寶德電導率儀8222、burkert電導率儀8222、寶德電導率儀8222、burkert 8222電導率儀、寶德 8222。電導(G)是電阻(R)的倒數(shù)。因此當兩個電極(通常為鉑電極或鉑黑電極)插入溶液中,可以測出兩電極間的電阻R。根據(jù)歐姆定律,溫度一定時,這個電阻值與電極間距L(cm)正比,與電極的截面積A(cm2)反比,即R =ρ×(L/A)。
burkert電導率儀8222 寶德電導率儀8222簡介:
Two technology of conductivity probes are available:
• probes based on 2-electrode principle are suited for measurements in clean solutions.Contaminations affect the measurement.
• probes based on 4-electrode principle exclude polarization phenomena and are not
sensitive to contamination. The engineered design guarantees an excellent inearity over a wide conductivity range of more than 6 decades.
注意事項:
導體的電導(G)可表示成下式:G =1/R=(1/ρ)×(A/L)=K×(1/J) ;其中,K=1/ρ稱為電導率,J =L/A稱為電極常數(shù);電解質(zhì)溶液電導率指相距1cm的兩平行電極間充以1cm3溶液時所具有的電導。由上式可見,當已知電極常數(shù)(J),并測出溶液電阻(R)或電導(G)時,即可求出電導率。
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