【概述】

　　鎧裝鉑熱電阻，是一種新型的溫度傳感器，具有體形細長，熱響應快，抗振動，使用壽命長等優點。它與顯示儀表配套，可實現對-200~600℃溫度的檢測或自動調節，廣泛就用于石油、化工、冶金、機械、電力、輕紡、食品、原子能、宇航等工業部門和科技領域。尤其適宜安裝在管道狹窄，彎曲和要求快速反映，微型化等特殊場合。

　　本公司生產的WZPK系列鎧裝鉑熱電阻，符合電工委員會（IEC）標準。我公司生產的鎧裝鉑電阻不但具有一般工業用熱電阻的特點外，還具有結構*新穎，品種規格齊全，技能性能指標高，質量穩定可靠等優點。

【Summary】

　　Sheath platinum RTD is a novel temperature sensor. It has the advantages such as slender form,quick heat response, vibration resistance, high voltage with standing, long use life etc. Itforms a complete est with the display instrument. It may test or automatically adjust the temperatures ranging from -200-+600℃. It is widely applied in the industrial departments and sci-tech fields such as petroleum, chemical, metallurgy, machinery, electric force, light textile, food, atomic energy, space flight etc. It is esp, fit for mounting in the narrow, bending pipelines or the special occasions with quick reaction or minimization.

　　WZPK serial sheath platinum RTD manufactured by this company absorbs and utilizes the advanced American production techniquess and full set of the testing facilities. As a result, this product conforms with the international Electrician's Committee （IEC） No. 751 publication 《Industrial Platinum Thermal Resistance》standard and our new domestic national industry criterion ZBY301-85《The Technical Conditions and Graduation Table of the Industrial Platinum Thermal Resistance》standard. It not only has the characteristics of the common industrial purpose thermal resistance, but also has the merits such as unique & novel structure, somplete variety & specification, high skill, performance and indexes, stable and reliable quality etc.

【鎧裝鉑熱電阻的構造】

　　由于鎧裝鉑熱電阻的使用要求不同，其外形也往往存在很大差異，但是它們的基本結構大致相同，通常由鎧裝鉑熱電阻感溫元件，安裝固定裝置和接線盒等主要部件組成。

　　1.鎧裝鉑熱電阻感溫元件：它是由金屬套管，絕緣材料（氧化鎂粉），引線和鉑熱電阻元件組合而成的堅實體。

　　2.安裝固定裝置，其結構形式可分為：無固定裝置，固定卡套螺紋、可動卡套螺紋紋、固定卡套法蘭，可動卡套法蘭等。

　　3.接線方式：其結構可分為無接線盒式、簡易式、防濺型接線盒式、防水型接線盒式、隔爆型接線盒式、插座式等。

作用原理】

　　熱電阻的作用原理是基于利用物質在溫度變化時本身電阻也隨著發生變化的特性來測量溫度的。熱電阻的受熱部分（感溫元件）是細金屬絲均勻地雙繞在絕緣材料制成的骨架上，當被測介質中有溫度梯度存在時，則所測得的溫度是感溫元件所在范圍內介質中的平均溫度。

【Principle of action】

　　The functional principle of the RTD is to measure the temperature as per the characteristic of the resistance changing in accordance with the substance temperature change. The heated parts of the RTD （thermosensitive elements）is evenly winded by the thin metal wires onto the skeleton which is made of ungroung materials.When the temperature gradient exists in the measured media, the measured temperature is the average temperature amid the dielectrical layer within the thermosensitive element range.

【型號標記 Model marks】

【The composition structure of the sheath platinum RTD】

　　The outer appearances of the sheath platinum RTD are quite different according to their different use requirements. But their basic structures are approximay the same. It is usually composed of the main components such as sheath platinum RTD thermosensitive elements, mounted fixing devices,connection boxes and so on.

　　1.Sheath platinum RTD thermosensitive elements:it is a solid substance combined by metal sleeve, unground （commonly the magnesia powder）, lead wire, platinum RTD components.

　　2.For installing the setting device, its structural form may be divided into non-fixing device, fixed cutting sleeve thread, movable cutting sleeve screw, fixed cutting sleeve flange, fixed compressed flange, flecible compressed flange etc.

　　3.Connecting method:its structure may be diveided intonon-connection block type, eay terminal block type, antisplash junction block type, water-proof wire connecting block type, explosion isolating terminal block type, socket type and so on.