a天堂最新进入网站,欧美日韩黄色大片在线观看,99热这里,久久综合色一综合色88

產(chǎn)品詳情
  • 產(chǎn)品名稱:帶固定螺紋熱電阻

  • 產(chǎn)品型號(hào):WZP-221
  • 產(chǎn)品廠商:其它品牌
  • 產(chǎn)品文檔:
你添加了1件商品 查看購(gòu)物車
簡(jiǎn)單介紹:
WZP-221帶固定螺紋熱電阻,系列工業(yè)用熱電阻作為溫度測(cè)量傳感器,通常與溫度變送器,調(diào)節(jié)器以及顯示儀表等配套使用,組成過(guò)程控制系統(tǒng),用以直接測(cè)量或控制各種生產(chǎn)過(guò)程中-200℃-500℃范圍內(nèi)的液體,蒸汽和氣體介質(zhì)以及固體表面的溫度。
詳情介紹:
   
WZP-221固定螺紋熱電阻,工業(yè)用熱電阻分鉑熱電阻和銅熱電阻兩大類。熱電阻是利用物質(zhì)在溫度變化時(shí)自身電阻也隨著發(fā)生變化的特性來(lái)測(cè)量溫度的。熱電阻的受熱部分(感溫元件)是用細(xì)金屬絲均勻地雙繞在絕緣材料制成的骨架上。當(dāng)被測(cè)介質(zhì)中有溫度梯度存在時(shí),所測(cè)得的溫度是感溫元件所在范圍內(nèi)介質(zhì)層中的平均溫度。裝配式熱電阻主要由接線盒、保護(hù)管、接線端子、絕緣套管和感溫元件組成,并配以各種安裝固定裝置。WZP型鉑電阻的感溫元件是一個(gè)鉑絲繞組,雙支鉑電阻主要用于需要用二次顯示、記錄或調(diào)節(jié)儀同時(shí)檢測(cè)同一地點(diǎn)溫度的場(chǎng)合。WZC型銅電阻的感溫元件是一個(gè)銅絲繞組。
熱電阻測(cè)溫原理
受熱后的金屬絲電阻隨著溫度的變化而變化,其熱電阻值R(t)與其所處溫度t的關(guān)系可表示為: R(t)=Ro(1+At+Bt2+------)按測(cè)得的電阻值查相應(yīng)分度號(hào)表即可得出被測(cè)溫度值t?;蛴娠@示儀表直接讀出。
Industrial thermal resistance contains two categories, Pt thermal reistance and Copper thermal ressistance.
Thermal resistance is used to measure temperature on the basis of the property that substances’own resistance varies with the temperature. The part of the thermal resistance that is heated (temperataure-sensing element) is made by dual winding of fine wires around the frame made of insulation materials. When there is temperature gradient in the mediums to be measured, the measured temperature is the average temperature in the dielectric layer within the range where the temperature-sensing element is placed.Packaged thermal resistance consists of connection box, protectin tube, connection terminal, insulating sleeve and various fixed devices.WZP Pt resistance’s temperature-sensing element is a Pt wire winding. Double platinum resistance mainly is used fou such situation where it is required to use secondary display instrument, recorder and accommodometer to simultaneously detect the temperature of the same place. WZC copper resistance’s temperature-snesing element is a copper wire winding.
Temperature measurement principle of thermal resistance
The resistance of the metal wire that has been heated varies with the termperature, and the relation between the thermal resistance value and the temperature it is at can be expressed as R(t)=Ro((1+At+Bt2+------)According to the resistance value that is measured to refer to corresponding graduation mark, the temperature t that is measured can be come out, or read it directly from the indicating instrument.



姓名:
電話:
您的需求:
 

滬公網(wǎng)安備 31010102004819號(hào)

91探花福利精品国产自产在线| 日韩AⅤ欧美AⅤ| 亚洲AV成人无码久久精品同性| 久久人妻一区精品色欧美| 久久性一一交一一性一一乱| 婷婷久久久| 色一情一伦一区二区三| 熟女喷水| 在线精品国精品国产尤物动漫| 被三个男人绑着躁我好爽| 色婷婷在线精品国自产拍| 亚洲丝袜美腿中文版| 日本高清视频中文字幕| 黄色国产99| 噜噜噜噜狠狠爱欧美| 日韩精品人妻无码专区系列| 欧美淫秽网免费观看| 噜噜噜久久亚洲精品| 超碰福利小说| 中文字幕高清不卡88| 后入一区| 天堂呦呦成人| 日韩熟女精品一区二区三区| bbw视频在线| 先锋中文欧洲AV| 久久综合AV无码专区线| 亚洲国产aⅴ精品一区二区| 孩交xxxx| 精品一区欧美中文字幕| 婷婷少妇一区二区三区| 先锋影音资源在线网| 91大神精品一区二区在线| 国产精品无码aV永久免费| 一本本久道| 四虎影视8848hh| 国产成人av大片大片在线播放| 国产亚洲精品超碰在线| 国产自国产自愉自愉24区| 欧美人与动人物牲交一区二区| 日韩无线视频免费观看| 九九精品视频欧洲无码|