BURKERT一體式電導率變送器,寶德8226型電導率變送器
BURKERT一體式電導率變送器通常都是在緣的基片諸如玻璃、陶瓷、硅等材料上，用絲網(wǎng)漏印或真空鍍膜工藝做出電極，再用浸漬或其它辦法將感濕膠涂覆在電極上做成電容元件。濕敏元件在不同相對濕度的大氣環(huán)境中，因感濕膜吸附水分子而使電容值呈現(xiàn)規(guī)律性變化，此即為濕度傳感器的基本機理。影響高分子電容型元件的溫度特性，除作為介質(zhì)的高分子聚合物的介質(zhì)常數(shù)ε及所吸附水分子的介電常數(shù)ε受溫度影響產(chǎn)生變化外，還有元件的幾何尺寸受熱膨脹系數(shù)影響而產(chǎn)生變化等因素。根據(jù)德拜理論的觀點，液體的介電常數(shù)ε是一個與溫度和頻率有關(guān)的無量綱常數(shù)。水分子的ε在T=5℃時為78.36，在T=20℃時為79.63。有機物ε與溫度的關(guān)系因材料而異，且不*遵從正比關(guān)系。在某些溫區(qū)ε隨T呈上升趨勢，某些溫區(qū)ε隨T增加而下降。多數(shù)文獻在對高分子濕敏電容元件感濕機理的分析中認為：高分子聚合物具有較小的介電常數(shù)，如聚酰亞胺在低濕時介電常數(shù)為3.0一3.8。而水分子介電常數(shù)是高分子ε的幾十倍。因此高分子介質(zhì)在吸濕后，由于水分子偶極距的存在，大大提高了吸水異質(zhì)層的介電常數(shù)，這是多相介質(zhì)的復合介電常數(shù)具有加和性決定的。由于ε的變化，使?jié)衩綦娙菰碾娙萘緾與相對濕度成正比。在設計和制作工藝中很難組到感濕特性全濕程線性。作為電容器，高分子介質(zhì)膜的厚度d和平板電容的效面積S也和溫度有關(guān)。溫度變化所引起的介質(zhì)幾何尺寸的變化將影響C值。高分子聚合物的平均脹系數(shù)可達到的量。例如硝酸纖維素的平均脹系數(shù)為108x10-5/℃。
436501 8400-GS84-VAFF-T2-A-S1-2-BCV/DC-Z                                       
436503 8400-GS84-VAFF-T2-A-S1-6-BCV/DC-W                                       
436563 8170-GS89-PD00-US-A-F1-J-000/00-0  * JW15                               
436564 8170-GS89-PD00-US-A-F1-J-000/00-0  * JW49                               
436567 8175-0000-0000-00-A-F1-E-BAC/DC-A  * MP04                               
436568 8175-0000-0000-00-A-F1-E-BAC/DC-G  * MP04                               
436569 8175-0000-0000-00-A-F1-F-BAC/DC-A  * MP04                               
436570 8175-0000-0000-00-A-F1-F-BAC/DC-G  * MP04                               
437339 8175-0000-0000-00-A-F1-F-BBM/AC-A  * MP04                               
437340 8175-0000-0000-00-A-F1-F-BBM/AC-G  * MP04                               
437524 8031-GS82-THAA-P7-L-F1-3-BDG/DC-Z  * GA01+JW06                          
437982 8031-GS82-THFF-P7-F-F1-3-BDG/DC-Z  * GA01+JW06                          
438531 8031-GS82-THAA-P7-F-F1-3-BDG/DC-Z  * GA01+JW06                          
438532 8031-GS82-THFF-P7-L-F1-3-BDG/DC-Z  * GA01+JW06                                                        
439908 8311-GS84-VAFF-KZ-B-S1-2-BCV/DC-Z  * ML31                               
439911 8311-GS84-VAFF-KZ-B-S1-6-BCV/DC-W  * ML31                               
439920 8311-GS84-VAFF-KZ-B-S1-2-BCV/DC-Z  * ML43                               
439923 8311-GS84-VAFF-KZ-B-S1-6-BCV/DC-W  * ML43         
            ：\39526590\39529839/39529830轉(zhuǎn)8005或者8002
//
\39529831\39529839\39529839-8007或者8008
/
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；單榮兵/余娟
BURKERT一體式電導率變送器,寶德8226型電導率變送器
439932 8311-GS84-VAFF-KZ-B-S1-2-BCV/DC-Z  * ML60                               
439935 8311-GS84-VAFF-KZ-B-S1-6-BCV/DC-W  * ML60                               
439944 8311-GS84-VAFF-KZ-B-S1-2-BCV/DC-Z  * ML32                               
439947 8311-GS84-VAFF-KZ-B-S1-6-BCV/DC-W  * ML32                               
439956 8311-GS84-VAFF-KZ-B-S1-2-BCV/DC-Z  * ML65                               
439959 8311-GS84-VAFF-KZ-B-S1-6-BCV/DC-W  * ML65                               
440015 KOMP-000-8225-0000-000-00-440015R                                       
440016 KOMP-000-8225-0000-000-00-440016J                                       
440017 KOMP-000-8225-0000-000-00-440017T                                       
440018 KOMP-000-8225-0000-000-00-440018U                                       
440019 KOMP-000-8225-0000-000-00-440019V                                       
440020 KOMP-000-8225-0000-000-00-440020A                                       
440229 KOMP-015-8226-F440-229-00-440229L                                       
440230 KOMP-395-8226-G427-139-00-440230R                                       
440258 SET8-8400-00000000-00-00-0-000/00-0* JW01                               
440321 8226-BC89-PKAA-C5-A-F1-A-BCV/DC-A  * KC82                               
440322 8226-BC89-PKAA-C5-A-F1-C-BCV/DC-A  * KC82                               
440323 8226-BC89-PKAA-C5-A-F1-C-BBM/AC-A  * KC82                               
440324 8226-BC89-PKAA-C5-A-F1-C-BCV/DC-G  * KC82                               
440325 8226-BC89-PKAA-C5-A-F1-C-BBM/AC-G  * KC82                               
440440 8223-BC89-PDFF-C5-A-F1-L-BCV/DC-A                                       
440456 8400-GS84-VAFF-T2-A-S1-6-BCV/DC-1                                       
440538 SET5-2031-02-15,000VS-0-000-440538A                                     
440539 SET5-2031-02-25,000VS-0-000-440539B                                     
440540 SET5-2031-02-40,000VS-0-000-440540Q                                     
442834 2031-A-2-15,0-EM-VG-GM84-C-D       * AF12                               
442835 2031-A-2-15,0-EM-VG-GM82-C-D       * AF12                               
443295 KOMP-000-8326-0000-000-00-443295W                                       
443296 KOMP-000-8326-0000-000-00-443296X                                       
443298 S030-SA60-VAAA-P5-0-00-0-000/00-0  * NK52                               
443299 S030-SA62-VAAA-P5-0-00-0-000/00-0  * NK52                               
443300 S030-SA63-VAAA-P5-0-00-0-000/00-0  * NK52