20升低溫恒溫槽供應是一種(zhong)恒(heng)(heng)溫控制(zhi)(zhi)裝置儀(yi)(yi)器(qi)。低溫恒(heng)(heng)溫水浴主要適用(yong)于各(ge)大(da)中(zhong)院校、科研企事業單位(wei)的(de)(de)(de)實驗室(shi)和化驗室(shi)，對各(ge)種(zhong)化學(xue)樣(yang)品，生物制(zhi)(zhi)品，紡織樣(yang)品的(de)(de)(de)蒸餾、干(gan)燥、濃縮(suo)、溫漬及(ji)冷藏。低溫恒(heng)(heng)溫水浴內膽(dan)采(cai)(cai)用(yong)優質不銹鋼板焊(han)接而(er)成(cheng)，外殼采(cai)(cai)用(yong)冷板噴塑，提高了儀(yi)(yi)器(qi)的(de)(de)(de)防腐能(neng)力。溫度控制(zhi)(zhi)采(cai)(cai)用(yong)智能(neng)化數(shu)字顯示控制(zhi)(zhi)，操作簡便、易懂，并帶有電子定(ding)時功能(neng)。

20升低溫恒溫槽本用(yong)于各種(zhong)試驗環境，需要(yao)控溫范圍在(zai)常(chang)溫條件(jian)下使(shi)用(yong)的(de)儀器，并配置雙制(zhi)(zhi)冷機，具有制(zhi)(zhi)冷速度快(kuai)、噪音低及(ji)恒溫精度高等優點，用(yong)途廣泛，是檢(jian)測和試驗單位*的(de)設備(bei)。

低溫恒溫水浴實現高溫(wen)(wen)(wen)(wen)(wen)、高濕(shi)(shi)(shi)只(zhi)需(xu)要(yao)往箱體(ti)空(kong)(kong)氣(qi)中(zhong)噴(pen)水蒸汽或霧化的(de)(de)(de)(de)水珠，進(jin)行加濕(shi)(shi)(shi)。低溫(wen)(wen)(wen)(wen)(wen)低濕(shi)(shi)(shi)則相(xiang)(xiang)對難(nan)于控制，因為此時(shi)的(de)(de)(de)(de)含(han)濕(shi)(shi)(shi)量很(hen)低，有時(shi)比大氣(qi)中(zhong)的(de)(de)(de)(de)含(han)濕(shi)(shi)(shi)量低很(hen)多，需(xu)要(yao)對箱體(ti)內(nei)(nei)流動的(de)(de)(de)(de)空(kong)(kong)氣(qi)除(chu)(chu)(chu)濕(shi)(shi)(shi)，使(shi)空(kong)(kong)氣(qi)變得干(gan)燥。目前(qian)國內(nei)(nei)外絕大多數(shu)的(de)(de)(de)(de)溫(wen)(wen)(wen)(wen)(wen)濕(shi)(shi)(shi)度(du)(du)箱都采用(yong)制冷除(chu)(chu)(chu)濕(shi)(shi)(shi)的(de)(de)(de)(de)原理，是(shi)在(zai)(zai)(zai)箱體(ti)的(de)(de)(de)(de)空(kong)(kong)氣(qi)預(yu)調(diao)室內(nei)(nei)加一組制冷光(guang)(guang)管(guan)。當濕(shi)(shi)(shi)空(kong)(kong)氣(qi)經過冷管(guan)時(shi)，其相(xiang)(xiang)對濕(shi)(shi)(shi)度(du)(du)會達(da)到(dao)(dao)(dao)100％RH，因空(kong)(kong)氣(qi)飽和(he)(he)在(zai)(zai)(zai)光(guang)(guang)管(guan)上結露(lu)，使(shi)空(kong)(kong)氣(qi)變得更(geng)干(gan)燥。這種除(chu)(chu)(chu)濕(shi)(shi)(shi)方(fang)(fang)式理論上可達(da)到(dao)(dao)(dao)零(ling)度(du)(du)以下的(de)(de)(de)(de)露(lu)點(dian)溫(wen)(wen)(wen)(wen)(wen)度(du)(du)，但是(shi)當冷點(dian)表(biao)面(mian)溫(wen)(wen)(wen)(wen)(wen)度(du)(du)到(dao)(dao)(dao)達(da)0℃時(shi)，光(guang)(guang)管(guan)表(biao)面(mian)結露(lu)的(de)(de)(de)(de)水滴會結冰，從而影響光(guang)(guang)管(guan)表(biao)面(mian)的(de)(de)(de)(de)熱(re)交換，使(shi)除(chu)(chu)(chu)濕(shi)(shi)(shi)能(neng)力下降。又因為箱體(ti)不可能(neng)密(mi)封，大氣(qi)中(zhong)的(de)(de)(de)(de)濕(shi)(shi)(shi)空(kong)(kong)氣(qi)會滲(shen)入(ru)到(dao)(dao)(dao)箱體(ti)內(nei)(nei)，使(shi)露(lu)點(dian)溫(wen)(wen)(wen)(wen)(wen)度(du)(du)回(hui)升。另一方(fang)(fang)面(mian)，在(zai)(zai)(zai)光(guang)(guang)管(guan)間(jian)流動的(de)(de)(de)(de)濕(shi)(shi)(shi)空(kong)(kong)氣(qi)只(zhi)是(shi)在(zai)(zai)(zai)和(he)(he)光(guang)(guang)管(guan)(冷點(dian))接觸的(de)(de)(de)(de)瞬間(jian)達(da)到(dao)(dao)(dao)飽和(he)(he)狀態而析出水蒸汽，因此這種除(chu)(chu)(chu)濕(shi)(shi)(shi)方(fang)(fang)法(fa)很(hen)難(nan)使(shi)箱體(ti)內(nei)(nei)的(de)(de)(de)(de)露(lu)點(dian)溫(wen)(wen)(wen)(wen)(wen)度(du)(du)在(zai)(zai)(zai)到(dao)(dao)(dao)0℃以下。實際所達(da)到(dao)(dao)(dao)的(de)(de)(de)(de)低露(lu)點(dian)溫(wen)(wen)(wen)(wen)(wen)度(du)(du)為5～7℃。露(lu)點(dian)溫(wen)(wen)(wen)(wen)(wen)度(du)(du)5℃相(xiang)(xiang)當于含(han)濕(shi)(shi)(shi)量為0.0055g/Kg，對應相(xiang)(xiang)對濕(shi)(shi)(shi)度(du)(du)20％RH的(de)(de)(de)(de)溫(wen)(wen)(wen)(wen)(wen)度(du)(du)為30℃。如果要(yao)求(qiu)溫(wen)(wen)(wen)(wen)(wen)度(du)(du) 20℃進(jin)相(xiang)(xiang)對濕(shi)(shi)(shi)度(du)(du)達(da)到(dao)(dao)(dao)20％RH，此時(shi)的(de)(de)(de)(de)露(lu)點(dian)溫(wen)(wen)(wen)(wen)(wen)度(du)(du)為－3℃，采用(yong)致冷方(fang)(fang)式除(chu)(chu)(chu)濕(shi)(shi)(shi)是(shi)很(hen)困難(nan)的(de)(de)(de)(de)，必須(xu)選用(yong)空(kong)(kong)氣(qi)干(gan)燥系統才(cai)能(neng)實現。

低溫恒溫水浴控制方式的選擇：

溫(wen)(wen)(wen)(wen)(wen)(wen)度(du)、濕(shi)度(du)試(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)箱(xiang)(xiang)(xiang)(xiang)有(you)(you)恒(heng)(heng)定(ding)試(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)箱(xiang)(xiang)(xiang)(xiang)、交(jiao)(jiao)變試(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)箱(xiang)(xiang)(xiang)(xiang)兩種情(qing)(qing)況。    普通的(de)(de)(de)高(gao)(gao)低(di)(di)溫(wen)(wen)(wen)(wen)(wen)(wen)試(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)箱(xiang)(xiang)(xiang)(xiang)一(yi)般指的(de)(de)(de)是恒(heng)(heng)定(ding)高(gao)(gao)低(di)(di)溫(wen)(wen)(wen)(wen)(wen)(wen)試(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)箱(xiang)(xiang)(xiang)(xiang)，其控制(zhi)方式(shi)為：設(she)定(ding)一(yi)個目標(biao)溫(wen)(wen)(wen)(wen)(wen)(wen)度(du)，試(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)箱(xiang)(xiang)(xiang)(xiang)具(ju)有(you)(you)自(zi)動恒(heng)(heng)溫(wen)(wen)(wen)(wen)(wen)(wen)到目標(biao)溫(wen)(wen)(wen)(wen)(wen)(wen)度(du)點的(de)(de)(de)能力(li)(li)。恒(heng)(heng)定(ding)溫(wen)(wen)(wen)(wen)(wen)(wen)濕(shi)度(du)試(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)箱(xiang)(xiang)(xiang)(xiang)的(de)(de)(de)控制(zhi)控制(zhi)方式(shi)也類似，設(she)定(ding)一(yi)個目標(biao)溫(wen)(wen)(wen)(wen)(wen)(wen)度(du)、濕(shi)度(du)點，試(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)箱(xiang)(xiang)(xiang)(xiang)具(ju)有(you)(you)自(zi)動恒(heng)(heng)溫(wen)(wen)(wen)(wen)(wen)(wen)到目標(biao)溫(wen)(wen)(wen)(wen)(wen)(wen)度(du)、濕(shi)度(du)點的(de)(de)(de)能力(li)(li)。高(gao)(gao)、低(di)(di)溫(wen)(wen)(wen)(wen)(wen)(wen)交(jiao)(jiao)變試(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)箱(xiang)(xiang)(xiang)(xiang)具(ju)有(you)(you)設(she)定(ding)一(yi)條或(huo)者多條高(gao)(gao)低(di)(di)溫(wen)(wen)(wen)(wen)(wen)(wen)變化(hua)、循環的(de)(de)(de)程序，試(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)箱(xiang)(xiang)(xiang)(xiang)有(you)(you)能力(li)(li)根據預置(zhi)的(de)(de)(de)曲線(xian)完成試(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)過程，并(bing)且可以(yi)在升(sheng)溫(wen)(wen)(wen)(wen)(wen)(wen)、降溫(wen)(wen)(wen)(wen)(wen)(wen)速率(lv)(lv)能力(li)(li)的(de)(de)(de)范(fan)圍內，控制(zhi)升(sheng)溫(wen)(wen)(wen)(wen)(wen)(wen)、降溫(wen)(wen)(wen)(wen)(wen)(wen)的(de)(de)(de)速率(lv)(lv)，即可以(yi)根據設(she)定(ding)的(de)(de)(de)曲線(xian)的(de)(de)(de)斜(xie)率(lv)(lv)控制(zhi)升(sheng)溫(wen)(wen)(wen)(wen)(wen)(wen)、降溫(wen)(wen)(wen)(wen)(wen)(wen)速率(lv)(lv)。同樣，高(gao)(gao)低(di)(di)溫(wen)(wen)(wen)(wen)(wen)(wen)交(jiao)(jiao)變濕(shi)熱試(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)箱(xiang)(xiang)(xiang)(xiang)也具(ju)有(you)(you)預置(zhi)溫(wen)(wen)(wen)(wen)(wen)(wen)度(du)、濕(shi)度(du)曲線(xian)，并(bing)且根據預置(zhi)進(jin)行(xing)控制(zhi)的(de)(de)(de)能力(li)(li)。當(dang)然，交(jiao)(jiao)變試(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)箱(xiang)(xiang)(xiang)(xiang)都(dou)具(ju)有(you)(you)恒(heng)(heng)定(ding)試(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)箱(xiang)(xiang)(xiang)(xiang)的(de)(de)(de)功能，但(dan)交(jiao)(jiao)變試(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)箱(xiang)(xiang)(xiang)(xiang)的(de)(de)(de)制(zhi)造成本較高(gao)(gao)，因(yin)為交(jiao)(jiao)變試(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)箱(xiang)(xiang)(xiang)(xiang)需配置(zhi)有(you)(you)曲線(xian)自(zi)動記(ji)錄裝置(zhi)、程序控制(zhi)儀，還須(xu)解決試(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)箱(xiang)(xiang)(xiang)(xiang)在工(gong)作室內溫(wen)(wen)(wen)(wen)(wen)(wen)度(du)較高(gao)(gao)的(de)(de)(de)情(qing)(qing)況下開啟制(zhi)冷機等問題，因(yin)此(ci)(ci)，交(jiao)(jiao)變試(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)箱(xiang)(xiang)(xiang)(xiang)的(de)(de)(de)價(jia)格(ge)比恒(heng)(heng)定(ding)試(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)箱(xiang)(xiang)(xiang)(xiang)的(de)(de)(de)價(jia)格(ge)一(yi)般要高(gao)(gao)20%以(yi)上(shang)。因(yin)此(ci)(ci)，我們應當(dang)實事求是的(de)(de)(de)以(yi)試(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)方法的(de)(de)(de)需要為出發點，選用恒(heng)(heng)定(ding)試(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)箱(xiang)(xiang)(xiang)(xiang)或(huo)者是交(jiao)(jiao)變試(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)箱(xiang)(xiang)(xiang)(xiang)。

低溫恒溫水浴DC4020性能特點：

采用微(wei)機溫(wen)(wen)(wen)控(kong)(kong)PID調節、自(zi)整定控(kong)(kong)制技術，控(kong)(kong)溫(wen)(wen)(wen)精度(du)(du)高；有斷偶保護功能，防止儀器(qi)失控(kong)(kong)；上限(xian)超(chao)溫(wen)(wen)(wen)報(bao)警功能，可(ke)自(zi)己(ji)設定，超(chao)出(chu)范圍(wei)，即(ji)刻報(bao)警；全封閉(bi)品牌(pai)壓縮機，降溫(wen)(wen)(wen)快、效率高、噪聲(sheng)低；儀器(qi)工作穩定可(ke)靠，操作非常方便；微(wei)機修正(zheng)溫(wen)(wen)(wen)度(du)(du)測量值偏差，數顯精度(du)(du)0.01度(du)(du)或0.1度(du)(du)； 循環(huan)泵可(ke)進行恒溫(wen)(wen)(wen)液體外引循環(huan)并(bing)可(ke)控(kong)(kong)制。

?可選配RS232或RS485通訊(xun)接(jie)口，實現數據傳輸進行(xing)遠距離控制。

?可以選(xuan)配程序控(kong)溫系(xi)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。

低溫恒溫槽DC0515主要應(ying)用領域(yu)：

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。