20升低溫恒溫槽供(gong)應是一種(zhong)(zhong)恒(heng)溫控制(zhi)裝置儀器(qi)。低(di)(di)溫恒(heng)溫水(shui)浴主要適用(yong)于各大中院(yuan)校、科(ke)研企事業單位的(de)實驗(yan)室(shi)和化驗(yan)室(shi)，對各種(zhong)(zhong)化學樣(yang)品(pin)，生物制(zhi)品(pin)，紡織樣(yang)品(pin)的(de)蒸餾、干燥(zao)、濃縮、溫漬及冷藏。低(di)(di)溫恒(heng)溫水(shui)浴內(nei)膽采(cai)用(yong)優質不銹鋼板(ban)焊接而成，外殼采(cai)用(yong)冷板(ban)噴塑(su)，提高(gao)了儀器(qi)的(de)防腐能力。溫度控制(zhi)采(cai)用(yong)智(zhi)能化數(shu)字顯(xian)示(shi)控制(zhi)，操作簡便、易懂(dong)，并帶有電(dian)子定時功能。

20升低溫恒溫槽本用(yong)于各種試(shi)驗環境，需要(yao)控溫范圍(wei)在常(chang)溫條件(jian)下使用(yong)的儀器，并配置雙(shuang)制(zhi)冷(leng)機，具有制(zhi)冷(leng)速度快、噪音低及恒(heng)溫精度高等優點，用(yong)途(tu)廣泛，是檢(jian)測(ce)和試(shi)驗單位*的設備(bei)。

低溫恒溫水浴實(shi)現(xian)(xian)高(gao)溫(wen)(wen)(wen)、高(gao)濕(shi)(shi)(shi)(shi)(shi)只(zhi)需要(yao)往箱體(ti)(ti)(ti)空(kong)氣(qi)(qi)(qi)中噴水蒸(zheng)汽(qi)或(huo)霧(wu)化的(de)(de)水珠，進行加濕(shi)(shi)(shi)(shi)(shi)。低(di)(di)溫(wen)(wen)(wen)低(di)(di)濕(shi)(shi)(shi)(shi)(shi)則相對(dui)(dui)(dui)(dui)難于控制(zhi)，因為此時(shi)的(de)(de)含濕(shi)(shi)(shi)(shi)(shi)量(liang)很(hen)低(di)(di)，有(you)時(shi)比大氣(qi)(qi)(qi)中的(de)(de)含濕(shi)(shi)(shi)(shi)(shi)量(liang)低(di)(di)很(hen)多(duo)，需要(yao)對(dui)(dui)(dui)(dui)箱體(ti)(ti)(ti)內(nei)流動(dong)的(de)(de)空(kong)氣(qi)(qi)(qi)除(chu)(chu)(chu)濕(shi)(shi)(shi)(shi)(shi)，使(shi)(shi)空(kong)氣(qi)(qi)(qi)變得(de)干燥。目前國內(nei)外絕大多(duo)數的(de)(de)溫(wen)(wen)(wen)濕(shi)(shi)(shi)(shi)(shi)度(du)(du)箱都采用(yong)制(zhi)冷除(chu)(chu)(chu)濕(shi)(shi)(shi)(shi)(shi)的(de)(de)原理，是(shi)在(zai)箱體(ti)(ti)(ti)的(de)(de)空(kong)氣(qi)(qi)(qi)預(yu)調室內(nei)加一組制(zhi)冷光(guang)(guang)(guang)(guang)管(guan)。當(dang)濕(shi)(shi)(shi)(shi)(shi)空(kong)氣(qi)(qi)(qi)經過(guo)冷管(guan)時(shi)，其相對(dui)(dui)(dui)(dui)濕(shi)(shi)(shi)(shi)(shi)度(du)(du)會(hui)達(da)(da)到(dao)(dao)(dao)100％RH，因空(kong)氣(qi)(qi)(qi)飽(bao)和(he)在(zai)光(guang)(guang)(guang)(guang)管(guan)上結(jie)露(lu)(lu)，使(shi)(shi)空(kong)氣(qi)(qi)(qi)變得(de)更(geng)干燥。這種除(chu)(chu)(chu)濕(shi)(shi)(shi)(shi)(shi)方(fang)式理論上可達(da)(da)到(dao)(dao)(dao)零度(du)(du)以下的(de)(de)露(lu)(lu)點(dian)溫(wen)(wen)(wen)度(du)(du)，但是(shi)當(dang)冷點(dian)表(biao)(biao)面(mian)溫(wen)(wen)(wen)度(du)(du)到(dao)(dao)(dao)達(da)(da)0℃時(shi)，光(guang)(guang)(guang)(guang)管(guan)表(biao)(biao)面(mian)結(jie)露(lu)(lu)的(de)(de)水滴會(hui)結(jie)冰，從(cong)而(er)影響光(guang)(guang)(guang)(guang)管(guan)表(biao)(biao)面(mian)的(de)(de)熱(re)交換，使(shi)(shi)除(chu)(chu)(chu)濕(shi)(shi)(shi)(shi)(shi)能力下降(jiang)。又因為箱體(ti)(ti)(ti)不可能密封，大氣(qi)(qi)(qi)中的(de)(de)濕(shi)(shi)(shi)(shi)(shi)空(kong)氣(qi)(qi)(qi)會(hui)滲入到(dao)(dao)(dao)箱體(ti)(ti)(ti)內(nei)，使(shi)(shi)露(lu)(lu)點(dian)溫(wen)(wen)(wen)度(du)(du)回升。另一方(fang)面(mian)，在(zai)光(guang)(guang)(guang)(guang)管(guan)間流動(dong)的(de)(de)濕(shi)(shi)(shi)(shi)(shi)空(kong)氣(qi)(qi)(qi)只(zhi)是(shi)在(zai)和(he)光(guang)(guang)(guang)(guang)管(guan)(冷點(dian))接觸(chu)的(de)(de)瞬間達(da)(da)到(dao)(dao)(dao)飽(bao)和(he)狀態而(er)析出水蒸(zheng)汽(qi)，因此這種除(chu)(chu)(chu)濕(shi)(shi)(shi)(shi)(shi)方(fang)法很(hen)難使(shi)(shi)箱體(ti)(ti)(ti)內(nei)的(de)(de)露(lu)(lu)點(dian)溫(wen)(wen)(wen)度(du)(du)在(zai)到(dao)(dao)(dao)0℃以下。實(shi)際(ji)所達(da)(da)到(dao)(dao)(dao)的(de)(de)低(di)(di)露(lu)(lu)點(dian)溫(wen)(wen)(wen)度(du)(du)為5～7℃。露(lu)(lu)點(dian)溫(wen)(wen)(wen)度(du)(du)5℃相當(dang)于含濕(shi)(shi)(shi)(shi)(shi)量(liang)為0.0055g/Kg，對(dui)(dui)(dui)(dui)應相對(dui)(dui)(dui)(dui)濕(shi)(shi)(shi)(shi)(shi)度(du)(du)20％RH的(de)(de)溫(wen)(wen)(wen)度(du)(du)為30℃。如果要(yao)求(qiu)溫(wen)(wen)(wen)度(du)(du) 20℃進相對(dui)(dui)(dui)(dui)濕(shi)(shi)(shi)(shi)(shi)度(du)(du)達(da)(da)到(dao)(dao)(dao)20％RH，此時(shi)的(de)(de)露(lu)(lu)點(dian)溫(wen)(wen)(wen)度(du)(du)為－3℃，采用(yong)致冷方(fang)式除(chu)(chu)(chu)濕(shi)(shi)(shi)(shi)(shi)是(shi)很(hen)困難的(de)(de)，必須選用(yong)空(kong)氣(qi)(qi)(qi)干燥系統(tong)才能實(shi)現(xian)(xian)。

低溫恒溫水浴控制方式的選擇：

溫(wen)(wen)(wen)(wen)(wen)(wen)度、濕(shi)度試(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)箱(xiang)(xiang)有(you)(you)恒(heng)定試(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)箱(xiang)(xiang)、交(jiao)變(bian)試(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)箱(xiang)(xiang)兩種(zhong)情況(kuang)(kuang)。    普通的(de)(de)(de)(de)(de)高(gao)低(di)(di)溫(wen)(wen)(wen)(wen)(wen)(wen)試(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)箱(xiang)(xiang)一(yi)般指的(de)(de)(de)(de)(de)是恒(heng)定高(gao)低(di)(di)溫(wen)(wen)(wen)(wen)(wen)(wen)試(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)箱(xiang)(xiang)，其控制(zhi)方式為(wei)：設(she)定一(yi)個目標(biao)溫(wen)(wen)(wen)(wen)(wen)(wen)度，試(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)箱(xiang)(xiang)具(ju)有(you)(you)自動恒(heng)溫(wen)(wen)(wen)(wen)(wen)(wen)到目標(biao)溫(wen)(wen)(wen)(wen)(wen)(wen)度點(dian)(dian)的(de)(de)(de)(de)(de)能力。恒(heng)定溫(wen)(wen)(wen)(wen)(wen)(wen)濕(shi)度試(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)箱(xiang)(xiang)的(de)(de)(de)(de)(de)控制(zhi)控制(zhi)方式也類似，設(she)定一(yi)個目標(biao)溫(wen)(wen)(wen)(wen)(wen)(wen)度、濕(shi)度點(dian)(dian)，試(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)箱(xiang)(xiang)具(ju)有(you)(you)自動恒(heng)溫(wen)(wen)(wen)(wen)(wen)(wen)到目標(biao)溫(wen)(wen)(wen)(wen)(wen)(wen)度、濕(shi)度點(dian)(dian)的(de)(de)(de)(de)(de)能力。高(gao)、低(di)(di)溫(wen)(wen)(wen)(wen)(wen)(wen)交(jiao)變(bian)試(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)箱(xiang)(xiang)具(ju)有(you)(you)設(she)定一(yi)條或者多條高(gao)低(di)(di)溫(wen)(wen)(wen)(wen)(wen)(wen)變(bian)化、循(xun)環的(de)(de)(de)(de)(de)程序(xu)，試(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)箱(xiang)(xiang)有(you)(you)能力根(gen)據預(yu)置(zhi)(zhi)的(de)(de)(de)(de)(de)曲線(xian)完成(cheng)(cheng)試(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)過程，并(bing)且可(ke)以在升(sheng)溫(wen)(wen)(wen)(wen)(wen)(wen)、降(jiang)(jiang)溫(wen)(wen)(wen)(wen)(wen)(wen)速(su)率(lv)(lv)能力的(de)(de)(de)(de)(de)范圍內，控制(zhi)升(sheng)溫(wen)(wen)(wen)(wen)(wen)(wen)、降(jiang)(jiang)溫(wen)(wen)(wen)(wen)(wen)(wen)的(de)(de)(de)(de)(de)速(su)率(lv)(lv)，即可(ke)以根(gen)據設(she)定的(de)(de)(de)(de)(de)曲線(xian)的(de)(de)(de)(de)(de)斜率(lv)(lv)控制(zhi)升(sheng)溫(wen)(wen)(wen)(wen)(wen)(wen)、降(jiang)(jiang)溫(wen)(wen)(wen)(wen)(wen)(wen)速(su)率(lv)(lv)。同樣(yang)，高(gao)低(di)(di)溫(wen)(wen)(wen)(wen)(wen)(wen)交(jiao)變(bian)濕(shi)熱試(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)箱(xiang)(xiang)也具(ju)有(you)(you)預(yu)置(zhi)(zhi)溫(wen)(wen)(wen)(wen)(wen)(wen)度、濕(shi)度曲線(xian)，并(bing)且根(gen)據預(yu)置(zhi)(zhi)進(jin)行控制(zhi)的(de)(de)(de)(de)(de)能力。當然，交(jiao)變(bian)試(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)箱(xiang)(xiang)都(dou)具(ju)有(you)(you)恒(heng)定試(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)箱(xiang)(xiang)的(de)(de)(de)(de)(de)功(gong)能，但交(jiao)變(bian)試(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)箱(xiang)(xiang)的(de)(de)(de)(de)(de)制(zhi)造成(cheng)(cheng)本較高(gao)，因(yin)為(wei)交(jiao)變(bian)試(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)箱(xiang)(xiang)需配置(zhi)(zhi)有(you)(you)曲線(xian)自動記錄裝(zhuang)置(zhi)(zhi)、程序(xu)控制(zhi)儀，還(huan)須解(jie)決試(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)箱(xiang)(xiang)在工作室內溫(wen)(wen)(wen)(wen)(wen)(wen)度較高(gao)的(de)(de)(de)(de)(de)情況(kuang)(kuang)下開啟制(zhi)冷機(ji)等問題，因(yin)此(ci)，交(jiao)變(bian)試(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)箱(xiang)(xiang)的(de)(de)(de)(de)(de)價格(ge)比恒(heng)定試(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)箱(xiang)(xiang)的(de)(de)(de)(de)(de)價格(ge)一(yi)般要高(gao)20%以上。因(yin)此(ci)，我們應當實事求是的(de)(de)(de)(de)(de)以試(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)方法的(de)(de)(de)(de)(de)需要為(wei)出(chu)發點(dian)(dian)，選用恒(heng)定試(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)箱(xiang)(xiang)或者是交(jiao)變(bian)試(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)箱(xiang)(xiang)。

低溫恒溫水浴DC4020性能特點：

采用微機(ji)溫控(kong)PID調節、自(zi)整(zheng)定(ding)控(kong)制技術，控(kong)溫精(jing)度高；有斷偶保護功能，防止儀器(qi)失(shi)控(kong)；上限超(chao)溫報警(jing)功能，可(ke)(ke)自(zi)己設定(ding)，超(chao)出范圍，即刻報警(jing)；全封閉品牌壓縮機(ji)，降溫快、效(xiao)率高、噪聲(sheng)低；儀器(qi)工作穩定(ding)可(ke)(ke)靠，操作非(fei)常(chang)方便；微機(ji)修(xiu)正溫度測(ce)量值偏(pian)差，數顯精(jing)度0.01度或0.1度； 循環泵可(ke)(ke)進行恒(heng)溫液體外引循環并可(ke)(ke)控(kong)制。

?可選配RS232或RS485通訊接口，實現數據傳輸進行遠(yuan)距離控制(zhi)。

?可以選配程序控(kong)溫系統，其特點為：
大屏幕液晶顯示，軟件程序控制，可編輯時間/溫度曲線。
多段可編溫度、時間程序，控制升溫、恒溫、降溫過程，且升溫速度、降溫速度可按用戶要求設置自動控制。
編寫儲存30個溫度/時間段，每個程序可設置0～9999分鐘運行時間。
多種參數設定方式:方便快捷的輸入鍵、移位鍵和增鍵、減鍵，設定溫度/時間段及其他高級控制參數或直接調儲存的溫度/時間設定程序。

低溫(wen)(wen)恒溫(wen)(wen)槽DC0515主(zhu)要應用領(ling)域：

分析儀器:光譜儀 質譜儀 粘度計 旋光儀 發酵裝置 旋轉蒸發儀 。
真空獲得及醫療:分子泵 擴散泵 降溫毯 X光機 核磁共振 加速器 。
工業設備及其他: 激光設備 真空鍍膜設備 生物制藥 模具 機床 真空爐 焊接機 反應釜。

低溫恒溫水浴DC4020主要應用領域：

分析儀器:光譜儀 質譜儀 粘度計 旋光儀 發酵裝置 旋轉蒸發儀 。
真空獲得及醫療:分子泵 擴散泵 降溫毯 X光機 核磁共振 加速器 。
工業設備及其他: 激光設備 真空鍍膜設備 生物制藥 模具 機床 真空爐 焊接機 反應釜。