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\r                        型號(hào)<\/span><\/span>\r                    <\/p>\r                <\/td>\r                

\r                        JH-CY<\/span><\/span>\r                    <\/p>\r                <\/td>\r            <\/tr>\r            

\r                        讀數(shù)方式<\/span><\/span>\r                    <\/p>\r                <\/td>\r                

\r                        刻度直讀<\/span><\/span>\r                    <\/p>\r                <\/td>\r            <\/tr>\r            

\r                        測(cè)量范圍<\/span><\/span>\r                    <\/p>\r                <\/td>\r                

\r                        0～25、50、100、200、300、400、600、800、1000（mg/l）共九個(gè)量程<\/span><\/span>\r                    <\/p>\r                <\/td>\r            <\/tr>\r            

\r                        測(cè)定樣品數(shù)<\/span><\/span>\r                    <\/p>\r                <\/td>\r                

\r                        8個(gè)<\/span><\/span>\r                    <\/p>\r                <\/td>\r            <\/tr>\r            

\r                        培養(yǎng)溫度<\/span><\/span>\r                    <\/p>\r                <\/td>\r                

\r                        20℃±1℃<\/span><\/span>\r                    <\/p>\r                <\/td>\r            <\/tr>\r            

\r                        測(cè)試精度<\/span><\/span>\r                    <\/p>\r                <\/td>\r                

\r                        符合部頒關(guān)于水質(zhì)BOD<\/span>5<\/span>精度測(cè)試標(biāo)準(zhǔn)（葡萄糖—谷標(biāo)液BOD<\/span>5<\/span>=180~230mg/l）<\/span><\/span>\r                    <\/p>\r                <\/td>\r            <\/tr>\r            

\r                        電源<\/span><\/span>\r                    <\/p>\r                <\/td>\r                

\r                        DC12V   500mA（已配轉(zhuǎn)換器）<\/span>\r                    <\/p>\r                <\/td>\r            <\/tr>\r        <\/tbody>\r    <\/table>\r
\r<\/strong>\r<\/p>\r

\r    JH-CY型直讀式BOD5測(cè)定儀測(cè)試原理<\/strong>     \r<\/p>\r

\r        BOD（生物化學(xué)需氧量）是環(huán)境水質(zhì)標(biāo)準(zhǔn)和污、廢水排放標(biāo)準(zhǔn)中的控制項(xiàng)目，是衡量有機(jī)物對(duì)水質(zhì)污染質(zhì)量指標(biāo)之一。目前BOD測(cè)定方法，主要是用化學(xué)稀釋法，其方法繁鎖，工作量大，高倍數(shù)稀釋時(shí)往往會(huì)引起較大誤差。直讀BOD5測(cè)定裝置的測(cè)定原理是把水樣或經(jīng)過(guò)預(yù)處理的水樣注入培養(yǎng)瓶?jī)?nèi)，同時(shí)放入二氧化碳吸收劑（NaOH），然后將培養(yǎng)瓶密封置于20±1℃的恒溫箱內(nèi)，在一定攪拌速度下對(duì)培養(yǎng)瓶?jī)?nèi)試樣進(jìn)行培養(yǎng)。由于好氣微生物的反應(yīng)，將消耗水中的氧氣，呼出二氧化碳，如果我們及時(shí)地用NaOH吸收生成的二氧化碳，培養(yǎng)瓶?jī)?nèi)上部空間的氧氣不斷地供給試樣中微生物的需氧量，這就造成了氣體氧分壓的下降，用差壓計(jì)測(cè)出氧分壓的下降量就可以測(cè)出水樣的BOD值。<\/span>     \r<\/p>\r    \r

\r    低價(jià)bod測(cè)定儀/國(guó)標(biāo)直讀bod測(cè)定儀<\/strong><\/span>     \r<\/p>\r

\r                    <\/span>\r<\/p>\r

\r    另有數(shù)顯式BOD5測(cè)定儀<\/strong><\/span>\r<\/p>\r

\r    \r<\/p>\r

\r    BOD快速測(cè)定儀<\/strong><\/span>\r<\/p>\r

\r    
\r<\/strong><\/span>\r<\/p>