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當前位置：首頁 > 熱電阻

測量原理

熱電阻的测温原理是基于导体或半导体的电阻值随着溫度的变化而变化的特性。熱電阻大都由纯金属材料制成，目前应用最多的是铂和铜，现在已开始采用镍、锰和铑等材料制造熱電阻。熱電阻通常需要把电阻信号通过引线传递到计算机控制装置或者其它一次仪表上。工業用熱電阻安装在生产现场，与控制室之间存在一定的距离，因此熱電阻的引線對測量結果會有較大的影響。

熱電阻的技術優勢：熱電阻可以远传电信号,灵敏度高,稳定性强,互换性以及准确性都比较好,但是需要电源激励,不能够瞬时测量溫度的变化。熱電阻應用最爲廣泛的就是PT100了。耐彎曲，可靠性好，抗氧化性好。

應用指南

工業用熱電阻作为测量溫度的传感器，通常和现实仪表记录仪表和电子调节器配套使用，熱電阻可以直接测量各种生产过程中从-200-420℃范围内的液体、蒸汽、气体及固体表面溫度。

産品列表

管道壁温熱電阻测量管道壁温熱電阻和顯示仪表、记录仪表等配套使用。直接精确测量各种生产过程中的-200～500℃范围内液体、蒸汽和气体介质以及固体表面溫度。
铠装熱電阻通常和顯示仪表、记录仪表等配套使用。直接精确测量各种生产过程中的-200～500℃范围内液体、蒸汽和气体介质以及固体表面溫度。
耐磨熱電阻適合于電廠球磨機及磨煤機、水泥窯頭、窯層等對保護管磨損嚴重的場合。
微型熱電阻适用于狭小场所的溫度测量与控制。是纺织、绦纶等行业业不可缺少的溫度测量装置。
石油化工熱電阻專業針對石油化工部門設計，可以直接測量－200℃－500℃範圍內液體、蒸汽和氣體介質以及固體表面測溫。
轴承熱電阻適合于電廠帶有軸承設備的軸承及其它須防震場合測溫。
热套熱電阻适合于蒸汽管道、锅炉及其他对溫度、壓力、流速有所要求的场合。
电站熱電阻专业针对电站设计，可以满足30万、60万千瓦等发电机组及辅机测温需要。直接测量各种生产过程中的-200℃～500℃范围内液体、蒸汽和气体介质以及固体表面溫度。
装配式熱電阻通常和顯示仪表、记录仪表等配套使用。直接测量生产过程中的-200～500℃范围内液体、蒸汽和气体介质以及固体表面溫度。
端面熱電阻适用于电厂汽轮机及电机轴瓦或其他机体表面溫度。
带溫度变送器远传防爆熱電阻通常和顯示仪表、记录仪表、电子计算机等配套使用，输出4~20mA。直接测量各种生产过程中的-200℃～500℃范围内液体、蒸汽和气体介质以及固体表面溫度。
工業用隔爆熱電阻工業用隔爆熱電阻作为溫度测量和控制的传感器与顯示仪表配套，以直接测量和控制生产过程中的气体、液体和蒸汽的溫度。
插座式熱電阻適用于測量-200-+450℃範圍內液體、氣體及固體表面測溫。
防腐熱電阻適合于石油化工各種腐蝕性介質中測溫。是氯堿行業的專用測溫儀表。

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