德國西門子股份公司創立于1847年,是電子電氣工程領域的企業。西門子自1872年進入中國,140余年來以創新的技術、的解決方案和產品堅持不懈地對中國的發展提供全面支持,并以出眾的品質和令人信賴的可靠性、的技術成就、不懈的創新追求,確立了在中國市場的地位。2015年(2014年10月1日至2015年9月30日),西門子在中國的總營業收入達到69.4億歐元,擁有超過32000名員工。西門子已經發展成為中國社會和經濟不可分割的一部分,并竭誠與中國攜手合作,共同致力于實現可持續發展。SIEMENS流量計東莞*出售
西門子超聲流量計和超聲波流量計一樣,因儀表流通通道未設置任何阻礙件,均屬*流量計,是適于解決流量測量困難問題的一類流量計,特別在大口徑流量測量方面有較突出的優點,它是發展迅速的一類流量計之一。
西門子超聲波流量計采用時差式測量原理:一個探頭發射信號穿過管壁、介質、另一側管壁后,被另一個探頭接收到,同時,第二個探頭同樣發射信號被*個探頭接收到,由于受到介質流速的影響,二者存在時間差Δt,根據推算可以得出流速V和時間差Δt之間的換算關系V=(C2/2L)×Δt,進而可以得到流量值Q
2 優缺點
優點
西門子超聲波流量計是一種非接觸式儀表,它既可以測量大管徑的介質流量也可以用于不易接觸和觀察的介質的測量。它的測量準確度很高,幾乎不受被測介質的各種參數的干擾,尤其可以解決其它儀表不能的強腐蝕性、非導電性、放射性及易燃易爆介質的流量測量問題。
缺點
現今所存在的缺點主要是可測流體的溫度范圍受超聲波換能鋁及換能器與管道之間的耦合材料耐溫程度的限制,以及高溫下被測流體傳聲速度的原始數據不全。目前我國只能用于測量200℃以下的流體。另外,超聲波流量計的測量線路比一般流量計復雜。這是因為,一般工業計量中液體的流速常常是每秒幾米,而聲波在液體中的傳播速度約為1500m/s左右,被測流體流速(流量)變化帶給聲速的變化量zui大也是10-3數量級.若要求測量流速的準確度為1%,則對聲速的測量準確度需為10-5~10-6數量級,因此必須有完善的測量線路才能實現,這也正是超聲波流量計只有在集成電路技術迅速發展的前題下才能得到實際應用的原因。
SIEMENS流量計東莞*出售
7ML12011EF00 7ML1201-1EF007ML12011AF00 7ML1201-1AF007ML12011EE00 7ML1201-1EE007ML12011AE00 7ML1201-1AE007ML12011EK00 7ML1201-1EK007ML12012EE00? 7ML1201-2EE007ML12012AE00 7ML1201-2AE007ML12011EC10 7ML1201-1EC107ML12011ED10 7ML1201-1ED107ML12012EA10 7ML1201-2EA107ML12012AA10 7ML1201-2AA107ML12011EA10 7ML1201-1EA107ML5221-1BA11 7ML5221-1BA127ML5221-1BA21 7ML5221-1BA257ML5221-1DA11 7ML5221-1DA127ML5221-1DA21 7ML5221-1DA257ML5221-2DA11 7ML5221-2BA117ML5221-1AA11
7ML5221-1CA117ML5221-1AA12 7ML5221-1CA127ML5033-1BA00-1A7ML5033-1AA00-1A7ML5033-1BB00-1A7ML5033-1BA10-1A7ML5033-1BA00-1B7ML5033-1CA00-1A7ML5033-2BA10-1A7ML5033-2BA10-2A
7ML1025-1BD017ML1025-1BD117ML1025-2BD017ML1025-2BD117ML1025-1CD017ML1025-2CD017ML1028-4AA107ML1028-4AA207ML1028-4AA307ML1028-4BA107ML1028-4BA207ML5033-2BA10-2B7ML1025-1BD017ML1025-1BD117ML1025-2BD017ML1025-2BD117ML1025-1CD017ML1025-2CD017ML1028-4AA107ML1028-4AA207ML1028-4AA307ML1028-4BA107ML1028-4BA207ML1028-4BA307ML1028-4AB107ML1028-4AB307ML1028-4AC107ML1028-4AC30?
7ML1034-1AA17ML1034-1AA27ML1034-1BA17ML1034-2AA17ML1034-2BA17ML1034-2AA117ML1034-2AA127ML1034-2BA117ML1034-1AA117ML1034-3AA11
7ML5034-2AA017ML5034-1AA017ML5034-3AA017ML1830-2AH 7MLs830-2AH7ML1034-1AA17ML1034-1AA27ML1034-1BA17ML1034-2AA17ML1034-2BA17ML1034-2AA117ML1034-2AA127ML1034-2BA117ML1034-1AA117ML1034-3AA117ML5034-2AA017ML5034-1AA017ML5034-3AA017ML1001-1AA01-0AA27ML1001-1BA01-0AA27ML1001-1AB01-0AA27ML1001-1AA01-0AB27ML1001-1BA01-0AB27ML1001-1AB01-0AB27ML1001-2AA01-0AA27ML1001-2BA01-0AA27ML1001-2AB01-0AA27ML1001-2AA01-0AB2
7ML1001-2BA01-0AB27ML1001-2AB01-0AB27ML1001-5AA01-0AA37ML1001-5BA01-0AA37ML1001-5AB01-0AA37ML1001-5AA01-0AB27ML1001-5BA01-0AB27ML1001-5AB01-0AB27ML1001-3AA01-0AA27ML1001-3AA01-0AB27ML5001-3AA01-0AA27ML5001-5AA01-0AA37ML1004-1AA10-1AB07ML1004-1AA10-1BB07ML1004-1AA10-2AB07ML1004-1AA10-2BB07ML1004-2AA10-1AB07ML1004-2AA10-1BB07ML12012EE00 7ML1201-2EE007ML12012AE007ML1201-2AE007ML12011EC107ML1201-1EC107ML12011ED107ML1201-1ED107ML12012EA107ML1201-2EA107ML12012AA107ML1201-2AA107ML12011EA107ML1201-1EA107ML5221-1BA117ML5221-1BA127ML5221-1BA217ML5221-1BA257ML5221-1DA117ML5221-1DA127ML5221-1DA217ML5221-1DA257ML5221-2DA117ML5221-2BA117ML5221-1AA117ML5221-1CA117ML5221-1AA127ML5221-1CA127ML5033-1BA00-1A7ML5033-1AA00-1A7ML5033-1BB00-1A7ML5033-1BA10-1A7ML5033-1BA00-1B7ML5033-1CA00-1A7ML5033-2BA10-1A7ML5033-2BA10-2A7ML1025-1BD017ML1025-1BD11