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   電  話:021-51860685
 
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   傳  真:021-51861217
   E-mail:zksy88@163.com
   地  址:顓興路358弄

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西門子QRA50M系列火焰探測器-電眼
 
QRA50M系列火焰探測器-電眼

品牌:SIEMENS(西門子)

產地:德國

 產品介紹

The flame detectors are used for the supervision of gas flames, yellow- or blue-burning oil flames and for ignition spark proving. High sensitivity.

  • With this type of flame supervision, the UV radiation emitted by gas or oil flames is used to generate the flame signal.

  • The radiation detector consists of a UV-sensitive cell with 2 electrodes, which ignite when illuminated with radiation in the 190...270 nm range of the spectrum, thereby triggering a current in the flame detector circuit.

  • The UV cell does not respond to glowing firebrick in the combustion chamber, daylight or light from the boiler room illumination.

The die-cast alloy flame detector head is sealed with a quartz-glass lens. In addition to the plug-in UV cell, the head contains a rotating shutter which – for the purpose of continuous testing of the UV cell’s striking and extinction voltage performance – interrupts the UV radiation at the rate of 3 times per second. The shutter is driven by a synchronous motor which is suited for continuous operation.

The flame detector is attached to the viewing tube by means of a flanged mounting coupling which has a 1 in. internal thread. A 3/8 in. tapping on the side of the coupling enables a cooling air conduit to be connected, provided that dry, dust- and oil-free compressed air is available.

 技術參數
主要參數
UV單元平均壽命 10000小時(在50ºC
爐膛背壓 500mbar最大
保護等級 IP54
重量 750g
環境條件
運輸環境 IEC 60 721-3-2
內部條件 class 2K2
機械條件 class 2M2
溫度范圍 -55...+50ºC
濕度 <95%
運行環境 IEC 60 721-3-3
內部條件 class 3K5
機械條件 class 3M2
溫度范圍 -20...+50ºC
濕度 <95%
不得進水
 

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