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E+H超声波液位计原理及安装要求
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本文由 威斯特传感器仪表有限公司 整理汇编
2018-10-16 10:01 777阅读次数
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超声波是机械波的一种,即是机械振动在弹性介质中的一种传播过程,它的特征是频率高、波长短、绕射现象小,另外方向性好,能够成为射线而定向传播。超声波在液体、固体中衰减很小,因而穿透能力强,尤其是在对光不透明的固体中,超声波可穿透几十米的长度,碰到杂质或界面就会有显着的反射,E+H超声波液位计就是利用它的这一原理而工作的。在超声波检测技术中,不管哪种E+H超声波仪器,都必须把电能转换超声波发射出去,再接收回来变换成电信号,完成这项功能的装置就叫超声波换能器,也被称作为探头。将超声波换能器置于被测液体或物位上方,向下发射超声波,超声波穿过空气介质,在遇到水面或物体介面时被反射回来,然后被换能器所接收并转换为电信号,电子检测部分检测到这一信号后将其变成物位信号进行显示并输出标准信号,供其它仪表或控制装置使用.由超声波在介质中传播原理可知,若介质压力、温度、密度、湿度等条件一定,则超声波在该介质中传播速度是一个常数。因此,当测量出超声波由发射到遇到物面或液面反射被接收所需要的时间,则可换算出超声波通过的路程,从而间接地测量出物位或者液位数据。E+H超声波液位计的工作原理是由换能器(探头)发出高频超声波脉冲遇到被测介质表面被反射回来,部分反射回波被同一换能器接收,转换成电信号。超声波脉冲以声波速度传播,从发射到接收到超声波脉冲所需时间间隔与换能器到被测介质表面的距离成正比。此距离值S与声速C和传输时间T之间的关系可以用公式表示:S=CxT/2。由于发射的超声波脉冲有一定的宽度,使得距离换能器较近的小段区域内的反射波与发射波重迭,无法识别,不能测量其距离值。这个区域称为测量盲区。盲区的大小与超声波物位计的型号有关。E+H超声波液位计安装要求:换能器发射超声波脉冲时,都有一定的发射开角。从换能器下缘到被测介质表面之间,由发射的超声波波束所辐射的区域内,不得有障碍物,因此安装时应尽可能避开罐内举措措施,如:人梯、限位开关、加热设备、支架等。另外须留意超声波波束不得与加料料流相交。安装仪表时还要留意:Z高料位不得进入丈量盲区;仪表距罐壁必需保持一定的间隔;仪表的安装尽可能使换能器的发射方向与液面垂直。(end)
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E+H超声波液位计原理及安装要求
- 超声波是机械波的一种,即是机械振动在弹性介质中的一种传播过程,它的特征是频率高、波长短、绕射现象小,另外方向性好,能够成为射线而定向传播。超声波在液体、固体中衰减很小,因而穿透能力强,尤其是在对光不透明的固体中,超声波可穿透几十米的长度,碰到杂质或界面就会有显着的反射,E+H超声波液位计就是利用它的这一原理而工作的。在超声波检测技术中,不管哪种E+H超声波仪器,都必须把电能转换超声波发射出去,再接收回来变换成电信号,完成这项功能的装置就叫超声波换能器,也被称作为探头。将超声波换能器置于被测液体或物位上方,向下发射超声波,超声波穿过空气介质,在遇到水面或物体介面时被反射回来,然后被换能器所接收并转换为电信号,电子检测部分检测到这一信号后将其变成物位信号进行显示并输出标准信号,供其它仪表或控制装置使用.由超声波在介质中传播原理可知,若介质压力、温度、密度、湿度等条件一定,则超声波在该介质中传播速度是一个常数。因此,当测量出超声波由发射到遇到物面或液面反射被接收所需要的时间,则可换算出超声波通过的路程,从而间接地测量出物位或者液位数据。E+H超声波液位计的工作原理是由换能器(探头)发出高频超声波脉冲遇到被测介质表面被反射回来,部分反射回波被同一换能器接收,转换成电信号。超声波脉冲以声波速度传播,从发射到接收到超声波脉冲所需时间间隔与换能器到被测介质表面的距离成正比。此距离值S与声速C和传输时间T之间的关系可以用公式表示:S=CxT/2。由于发射的超声波脉冲有一定的宽度,使得距离换能器较近的小段区域内的反射波与发射波重迭,无法识别,不能测量其距离值。这个区域称为测量盲区。盲区的大小与超声波物位计的型号有关。E+H超声波液位计安装要求:换能器发射超声波脉冲时,都有一定的发射开角。从换能器下缘到被测介质表面之间,由发射的超声波波束所辐射的区域内,不得有障碍物,因此安装时应尽可能避开罐内举措措施,如:人梯、限位开关、加热设备、支架等。另外须留意超声波波束不得与加料料流相交。安装仪表时还要留意:Z高料位不得进入丈量盲区;仪表距罐壁必需保持一定的间隔;仪表的安装尽可能使换能器的发射方向与液面垂直。(end)[详细]
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2018-10-16 10:01
产品样册
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E+H超声波液位计原理
- E+H超声波是机械波的一种,即是机械振动在弹性介质中的一种传播过程,它的特征是频率高、波长短、绕射现象小,另外方向性好,能够成为射线而定向传播。E+H超声波在液体、固体中衰减很小,因而穿透能力强,尤其是在对光不透明的固体中,E+H超声波可穿透几十米的长度,碰到杂质或界面就会有显着的反射,E+H超声波液位计就是利用它的这一原理而工作的。在E+H超声波检测技术中,不管那种E+H超声波仪器,都必须把电能转换E+H超声波发射出去,再接收回来变换成电信号,完成这项功能的装置就叫E+H超声波换能器,也被称作为探头。将E+H超声波换能器置于被测液体或物位上方,向下发射E+H超声波,E+H超声波穿过空气介质,在遇到水面或物体介面时被反射回来,然后被换能器所接收并转换为电信号,电子检测部分检测到这一信号后将其变成物位信号进行显示并输出标准信号,供其它仪表或控制装置使用.由E+H超声波在介质中传播原理可知,若介质压力、温度、密度、湿度等条件一定,则E+H超声波在该介质中传播速度是一个常数。因此,当测量出E+H超声波由发射到遇到物面或液面反射被接收所需要的时间,则可换算出E+H超声波通过的路程,从而间接地测量出物位或者液位数据。E+H超声波液位计的工作原理是由换能器(探头)发出高频E+H超声波脉冲遇到被测介质表面被反射回来,部分反射回波被同一换能器接收,转换成电信号。E+H超声波脉冲以声波速度传播,从发射到接收到E+H超声波脉冲所需时间间隔与换能器到被测介质表面的距离成正比。此距离值S与声速C和传输时间T之间的关系可以用公式表示:S=CxT/2。由于发射的E+H超声波脉冲有一定的宽度,使得距离换能器较近的小段区域内的反射波与发射波重迭,无法识别,不能测量其距离值。这个区域称为测量盲区。盲区的大小与E+H超声波物位计的型号有关。E+H超声波液位计安装要求:换能器发射E+H超声波脉冲时,都有一定的发射开角。从换能器下缘到被测介质表面之间,由发射的E+H超声波波束所辐射的区域内,不得有障碍物,因此安装时应尽可能避开罐内举措措施,如:人梯、限位开关、加热设备、支架等。另外须留意E+H超声波波束不得与加料料流相交。安装仪表时还要留意:Z高料位不得进入丈量盲区;仪表距罐壁必需保持一定的间隔;仪表的安装尽可能使换能器的发射方向与液面垂直。[详细]
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2024-09-13 06:50
产品样册
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E+H超声波液位计说明书
- E+H超声波液位计说明书恩格斯豪斯FMU30超声波液位计优势特性,是FMU230、FMU231的理想升级替代品防护等级好,性价比高菜单引导功能,轻松实现现场操作德国E+HFMU30超声波液位计典型应用污水提升泵站、污水处理池废水、泥浆、石灰浆地下油罐流动性好的固体粉料、颗粒料ProsonicT适用于对液体及颗粒料位进行非接触式连续物位测量的一体化仪表。有两种不同测量范围的变送器可供选择。1.FMU230固体测量范围:2m液体测量范围:4m2.FMU231E-AA32固体测量范围:3.5m液体测量范围:7m两种E+H变送器都配有一体化的E+H温度传感器,用于对时间行程测量原理的补偿。德国E+H恩格斯豪斯超声波液位计的性能和优点1.螺纹连接G1?",1?NPT"或G2",2"NPT2.可旋转外壳3.带可选现场显示,按钮操作简便4.LED发光显示能快速监测操作状态5.两线制供电E+H超声波液位计说明书德国E+H恩格斯豪FMU231E-AA32优点:■非接触测量,与材料特性几乎无关■集成温度传感器的传输时间修正,甚至温度变化时,测量仍然准确■测量值以任意单位输出的线性化功能■带可选择的显示器■通过G1?"、G2"、NPT1?"或NPT2"螺丝简单固定■二线制仪表,物位由4-20mA输出电流显示■可旋转外壳■带可选现场显示,按钮操作简便■LED发光显示能快速监测操作状态■两线制供电德国E+H恩格斯豪FMU231E-AA32[详细]
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2024-09-13 06:50
产品样册
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E+H 超声波液位计操作手册
- E+H超声波液位计操作手册德国E+H超声波液位计的组成部分:超声波换能器、处理单元、输出单元。德国E+H超声波液位计针对腐蚀性、有结层或者是含酸碱废水来说,都是一种非常理想的测量工具。超声波液位计可测量的介质包括盐酸、硫酸、氢氧化物、废水、树脂、石蜡、泥浆、碱液和漂白剂等工业用剂,广泛应用于水处理、化工、电力、冶金、石油、半导体等行业。德国E+H超声波液位计的优点非接触式测量无可动部件、结构简单、使用寿命长耐腐蚀(探头大多采用PVDF、PP等材料)自动温度补偿功能不受介质湿度、粘度的影响不受介质介电常数、电导率、热导率的影响优异的性能价格比德国E+H超声波液位计的注意事项德国E+H超声波液位计耐温能力有限,大多数小于60℃,个别特殊产品可达100℃真空环境下无法测量,压力的大幅波动影响测量精度安装时尽量避开气泡、障碍物、波浪等干扰因素德国E+H超声波液位计的工作原理是由换能器(探头)发出高频超声波脉冲遇到被测介质表面被反射回来,部分反射回波被同一换能器接收,转换成电信号。超声波脉冲以声波速度传播,从发射到接收到超声波脉冲所需时间间隔与换能器到被测介质表面的距离成正比。超声波液位计此距离值S与声速C和传输时间T之间的关系可以用公式表示:S=CxT/2。德国E+H超声波液位计由于发射的超声波脉冲有一定的宽度,使得距离换能器较近的小段区域内的反射波与发射波重迭,无法识别,不能测量其距离值。这个区域称为测量盲区。盲区的大小与超声波物位计的型号有关。德国E+H超声波液位计特点德国E+H超声波液位计由于采用了先进的微处理器和独特的EchoDiscovery回波处理技术,超声波物位计可以应用于各种复杂工况。换能器内置温度传感器,可实现测量值的温度补偿。德国E+H超声波液位计换能器采用**声学匹配之ZL技术,使其发射功率能更有效地辐射出去,提高信号强度,从而实现准确测量。E+H超声波液位计操作手册德国E+H位计上安装温度传感器实时测量温度,并利用式(3)中给定的温度与声速的关系,方便地换算出声速值。但是,实际上声速又不仅仅受温度影响,还与气体密度、气压、湿度、空气中的悬浮物等诸多因素有关。因此,在实际应用中仅利用测量温度的方法对声速进行标定还有诸多不足,且在温度测量过程中也会存在一定的误差,因此温度补偿方法只适用一般应用,而无法满足高精度测量。2.1.2实测声速补偿实践证明,无论是利用何种经验公式和经验数据对声速进行补偿,都会由于测量环境的复杂性和测量方法等原因,引进新的误差。因此利用实测声速的方法进行声速补偿被认为是Z可靠的补偿方法。如图2所示,在发射探头前端安装一个挡板,挡板与探头形成一个距离固定的声程区间,该结构称之为声程架。当探头发射声波时,该挡板能将一部分声波反射回探头。探头接收到反射波后,计算从发射到接收的时间,利用式(4)计算声速其中,L为声程架的声程长度;t为声波传播时间。利用实测声速方法进行补偿,由于补偿声波与测量声波传播路径所处的环境极为相似,所受的环境影响也基本一致,其声速通常也较接近,所以这种方法是目前使用Z极ng确的声速修正方式。但是在这种方法的使用中,声程架应选用低温度膨胀系数的材料,以免环境温度变化声程架发生热胀冷缩,使声程距离L发生改变,影响实测声速精度。E+H超声波液位计操作手册[详细]
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2024-09-13 06:50
产品样册
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E+H超声波液位计技术资料
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E+H超声波液位计技术资料德国E+HE+H总代理现货E+H原装E+HE+H特价E+H上海E+H公司创建于1953年,总部位于瑞士,在世界各地有40多个分支机构,有超过5,800名员工在进行研究、开发、生产、销售和维护工作。在德国、瑞士、法国、美国、日本等世界工业国成立了规模庞大的生产ZX,其严格的品质管理和完整的质保体系均已达到ISO9001国际标准。联系市场是开发高质量、高可靠性仪表的重要因素之一,40多年来,E+H公司通过紧密联系市场,不断开发适销对路产品,受益匪浅,并已成为全方位的供应商。欢迎来电或传真咨询E+H恩格斯豪斯详细信息!E+HFTM50-AGG2A2A32AAE+HFTC51-DG2AB51E4L=320mmE+HFTL20-0220E+HFTM50-AGG2A1A52AAE+HFTL50H-AGW2AC2C3AE+HDB50L-AC44BD13GG30E+HFTL20-0425E+HFTM51-AGG2L4A73AAL=500mmE+HFTL20-0025E+HFTL20-0220E+HFTM31-A4BA1AL=600MME+HFTM51-AGG2L4A13AAL=1500MME+HFTC51-DG2AB51E4L=550mmE+HFTL20H-0GDJ2FE+HFTM31-A2BA1AL=380MME+HFTL260-0210E+HPMP41-RE13M2J11XAE+HFTC260-AA4D1E+HDC11TEN-AA11A1BKL1L=600E+HFMR245-54CQKAC4AE+HFTM51-AGG214A73AAL=500E+HFMR250-A4E1GGJAA4ME+HDC12TA-A11EL1BM41L=12E+HFTM51-AGJ2C4A32AAL=500E+HFTL260-0220E+HFTM260-G4BE+HFTC260-BB4B1E+HFMR230-A4UCWJBA2AE+HFTC262-AA64D1E+HFMP40-ABB2GRJb21CAL=18000E+HFTC260-BA2D1E+HFMR231-AFGGSAA2AAE+HFTM260-G4DE+HDB53-AM71BC12GG20L=7000mmE+HDB52-AK10BD11GG20L=22ME+HFEC12E+HFTL325P-F3E3E+HDB53-AM71BC12GG20L=6000mmE+HFTC968DCPNPE+HFTM325-C2A1AE+HFTC325-A2A31E+HFTL51-IAF2BB4G7AL=3000MME+HFMX167-A3ABE1B7E+HFTM31-A1DA1BE+HFTM51-AGG2L2A12AAL=500MME+HFTM31-A2DA1BE+HFTW325-A2A1AE+H50W2H-H50A1A10A7AWDN=200E+H50W3H-H50A1A10A7AWDN=300E+H50W1F-H50A1A10B7AWE+H50P50-AA1A1AA0AAAAE+H80I50-AD2WAAAAA4ADE+HFMC671Z-A0E1A1DC24VE+HPMP635-R43L9M1AEU1E+H50088281E+H50004201E+H50P40-EA2A1AA0AAAAE+H92TA1-AAE+H72F50SF0-AA12AA4AWE+H80F40-AD2SAAAAAAE+H83F40-AD2SAAAANBE+H50P80-EA1A1AA0BAAAE+H80F50-AD2SAAAABAABAE+HDTI200-ABB22AE+H50W65-HA0A1A0AAAWE+H50W80-HA0A1A1AAAWE+H50W2F-HC0A1A1AAAWE+H50W25-UAOA1AA0A4AAE+H53H04-KA0B1AC1AAHAJE+H53H08-KA0B1AC1AAHAJE+H50W40-UA0A1AA0AAAAE+H50W50-UA0A1AA0AAAAE+H50W25-UA0A1AA0AAAAE+H72F80SE0-AA1AAA4AAAE+H72F50SE0-AA1AAA4AAAE+H83F50-AFTSAAAAAAAE+H53H80-A00B1AA0ABABE+H53H40-A00B1AA1ABABE+H53H15-A001AA0AAABE+H50H40-UF0B1AA0AAADE+H50P40-EA2A1AA0BAAAE+H50P50-EA2A1AA0BAAAE+H50P80-EA2A1AA0BAAAE+H80M50-AS2AABAAAAA8E+H50W4H-HC0A1AA0AA4AAE+H50P1F-AA1A1A0AAAAE+H65F15-AE2AG1AABAAE+H65F25-AE2AG1AABAAE+H50W3H-HD0A1AA0AAE+H65F15-AE2AG1AAAAAE+H80E08-AD2SAABAAAAAE+H80E08-AD2SAABAABAAE+H72F50-SE0AA1DAA4AAE+H72F40-SE0AA1DAA4AAE+H72F1F-SE0AA1DAA4AAE+H50P1F-EC0A1AACZAAAAE+H72F40-SE1AA1AAA4AWE+H72F15-SE1AA1AAA4AWE+H50W25-UA0A1AA0A4AAE+H72W50-SE0AAA1AAC4AAE+H50P25-EA0A1A0AAAAE+H80F80-AD2SAAAAAAE+H80F25-AD2SAAAAAAE+H83F80-AD2SAAAAAAE+H83F25-AD2SAAAAAAE+H50W1F-UC0A1AA0A4AAE+H50W1H-HC0A1AA0AAAAE+H53P1H-EC0B1BA0ABAAE+H53P1Z-EH2B1BA0ABAAE+H50W3H-HC0A1AA0ABAAE+H50W5H-HC0A1AK1ABAAE+H50W4F-HC0A1AK2ABAAE+H53W65-HH0B1BA0ABAAE+H50W80-HC0A1AK1ABAAE+H50W1Z-HC0A1AA0ABAAE+H50W1H-HA0A1AA0AAAWE+H50P15-EA1A1AC0A4AAE+H50P1H-EC1A1A10AAAAE+H50P50-EA1A1AC0AAAAE+H10W32-UAGA1RA0BAE+H10W32-UAGA1AA0A4AAE+H10W40-UAGA1AA0B4AAE+H10W1H-UCGA1AA0B4AAE+H40E25-AD2SAABABAE+H80M80-AS2AAABABBAAE+H80M50-AS2AAABABBAAE+H50W1F-H50A1A10B7AWE+H72W1F-990AA1CAB4AAE+H72W80-991AA1CAB4AAE+H50W32-UA0A1A10AAAWE+H50W2H-UB0A1AA0AAAWE+H50W40-UL1A1AA0A4AAE+H50W50-UL1A1AA0A4AAE+H50W2H-UL1A1AA0A4AAE+H50W80-UL1A1AA0A4AAE+H50P40-EA1A1AA0BAAWE+H53P15-EA0B1AA0AAAJE+H50P15-EA0A1AA0AAAAE+H50P80-BC0A1AC1AAAAE+H53W1H-UA0B1AA0AAAAE+H50H1H-UF0A1AB0AAAE+H83F1H-AD1SAACAAAQE+H83F1F-AD2SAACAAAQE+H83F40-AD2SAA3AAGAAE+H80F80-AD2SAAAAAAE+H80F25-AD2SAAAAAAE+H72F1F-SE0AA1DAA4AWE+H50W5H-UD0A1AK2AAAHE+H52013305E+H52013543E+H51501081E+H50098566E+H50W4H-UD0A1AK2AAAHE+H83A02-ASVWAAAAAABE+H50W1H-HC0A1AK2AAAAE+H50W7H-HC0A1AK2AAAAE+H80F15-AAASAABABAAAAAE+H80F50-AD3SAAAAAAAAE+H50H08-A00A1AA0AAAAE+H72F2F-SB0BA1AAA4AWE+H73F1H-SB4BA1AAA4AE+H53W2F-HD0B1AC4AGAAL=15ME+HCYY102-AE+HRMS621-21AAA1211E+H53P4H-EC1B1AC2AAAAE+H53P80-AA1B1AC2AAAAE+H53P1H-EC0B1BA0AGAAE+H10P50-EA1A1AA0AAE+H50P1F-EC0A1AA0AAAAE+H83F40-AD2SAABACAJVE+H55S40-EA1B1AC0AAAAE+H72F1H-SB0AA1CAA4AWE+H80E40-AFTSAAAABAAAE+H80M50-AS2AABAAAAA8E+H50P65-EA1A1AA0BAAAE+H50P40-EA1A1AA0BAAAE+H50H04-A00A1AC1AAAAE+H53P1H-EC0B1BG2AGAAE+H53P1H-EC0B1BA0AGAAE+H91WA1-AA3J12ACA4AAL=60米E+H50P2H-EC0A1AC1ABAAE+H50P1F-EC0A1AA0AAAAE+H55S40-EA1B1AC0AAAAE+HNT471-ROAOE+H83M40-AS4ABAB1BHA2E+H50W2H-UDOB1AA0AAAWE+H50W3H-UD0B1AA0AAAWE+H50H08-DB0B1AA0ABAAE+H53H08-DA0B1AA0AAAAE+H53P15-EA0B1AA0ABAAE+H83F80-AAASAACABHARE+H80M80-ASAAAAAABAAAE+H50P40-EA0A1BG1AAAWE+H50P50-EA0A1BG1AAAWE+H50P40-AA1A1AA0AAAAE+H80F50-BD2CAAAAAAAAE+H83I25-AD2WAAAAAHAAE+H50P65-EC0A1AA0AAAAE+H50W50-UA0A1AA0AAAAE+H83A04-ASVWAAAAAAAJE+H50P25-EA0A1AA0AAADE+H50P32-EA0A1AA0AAADE+H50P40-EA0A1AA0AAADE+H50P50-EA0A1AA0AAADE+H50W65-HC0A1AA0AAADE+H50W80-HC0A1AA0AAADE+H50W2H-HC0A1AA0AAADE+H50P65-EA1A1A10AAAHE+H50W65-UC1A1A10AAAHE+H72F1H-SE1AA1AAA4AAE+H72F25-SMOAAIDAB4AWE+H72F1H-SE0BA1AAA4AWE+H72F50-SE0BA1AAA4AWE+H72F40-SE0BA1AAA4AWE+H10W3H-UD0A1AG2A4AAE+H10W4H-UD0A1AG2AAE+H83125-AD2WAAAAAHAAE+H53H80-2F0B1AA0CAAAE+HRN221N-B1E+H72W25-SD0AA1AAA4AWE+H65I-20AB1AB1AAABAAE+H80F50-AD2SAAAAAAAAE+H80F25-BD2CAAAABEAAE+H72F25-SK0AA1CAB4AWE+H10W80-HC0A1AA0A4AAE+H72F50-SE0AA1CAB4AWE+H53H80-2F0B1AA0CAAAE+H72W50-SE0AA1CAB4AWE+H72F1F-SM0AA1CEA4AAE+H80F15-ADS2SAA3AABAAE+H53W4H-HC0B1AA0BAAAE+H93PA1-AB2B10ACABAAE+H53W3F-HD0B1AA0BAAAE+H50H02-A00A1AA0AAAAE+H80F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2024-09-10 23:04
产品样册
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E+H超声波液位计温度测量
- E+H超声波液位计温度测量威斯特【上海】仪表传感器有限公司作为众多国际传感器、仪表、电磁阀编码器,气动元件生产厂商及台湾鹰牌磨刀机在ZG的代理,公司为广大用户提供性能优越、价格合理的传感器、仪表、电磁阀产品。可满足用户的不同产品需求。公司以保证良好的服务这为宗旨。与国内外各企业建立广泛的合作伙伴关系.本公司主营产品有:一、气动元件:德国品牌:德国FESTO气动元件,德国宝德BURKERT电磁阀,德国海隆诺冠;日本品牌:日本SMC气动元件日本CKD气动元件小金井气动元件日本NOK;韩国品牌:韩国YPC气动元件,韩国TKC韩国YSC气动元件TPC气动元件;意大利品牌:意大利UNIVER,意大利康茂盛,美国ASCO电磁阀,美国ROSS二、工控产品:德国品牌:德国PILZ继电器,德国IFM传感器,德国海德汉HEIDENHAIN,德国P+F传感器,德国RENCON编码器;德国TURCH图尔克,德国赫斯曼工业交换机日本品牌:日本欧姆龙传感器日本神视日本基恩士,日本奥普士;日本SUMTAK(盛太克)编码器,日本内密控编码器,三、液压元件美国NUMATICS纽曼帝克,PARKER气动液压,VICKERS威格士,美国MOOG,美国FAIRCHILD,美国ROSEMOUNT罗斯蒙特,美国丹尼逊德国HAWE哈威德国REXROTH力士乐,HYDAC贺德克,德国E+H日本油研(YUKEN)日本不二越NACHI,日本TOYOOKI丰兴日本大金意大利ATOS阿托斯。德国E+H超声波液位计工作时,高频脉冲声波由换能器(探头)发出,遇被测物体(水面)表面被反射,折回的反射回波被同一换能器(探头)接收,转换成电信号。脉冲发送和接收之间的时间(声波的运动时间)与换能器到物体表面的距离成正比,声波传输的距离S与声速C和传输时间T之间的关系可以用公式表示:S=CⅩT/2安装超声波液位计时必须考虑超声波液位计的盲区问题。当液位进入盲区后,超声波变送器就无法测量液位了,所以在确定超声波液位计的量程时,必须留出50公分的余量,安装时,变送器探头必须高出Z高液位50公分左右。这样才能保证对液位的准确监测及保证超声波液位计的安全。在实际使用中,因为安装时考虑不周,液位计被水淹没,致使液位计完全损坏。德国E+H超声波液位计需要的现场条件有1)环境温度:-10~+60℃(低温情况需特殊说明)2)表壳保护等级:IP65适用于户外安装3)适用测量的介质:适用于大部分液体及粉状颗粒状固体,弱酸,弱碱,强碱,低于40%的强酸。若在强酸应用场合,请与我司联系,应使用防腐探头。4)容器压力:0.7~3bar5)在下面的任何一种情况,要注意:①有泡沫的液体/固体②周围有强电压,强电流,强电磁干扰,尽量避免高电压,高电流及强电磁干扰③大风和太阳直晒④强震动[详细]
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2024-09-13 06:50
产品样册
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FMU30超声波液位计E+H下载
- 德国E+HFMU30超声波液位计性能参数液体量程:0-5米分辩率:1mm盲区:25cm供电方式:DC24V(标准)精度:±3mm显示:清晰的多行文本图解显示、包络线显示输出:4…20MA过程连接:1-1/2”(5m)外壳材质:F16塑料透明显示盖优势特性防护等级好,性价比高菜单引导功能,轻松实现现场操作性能参数液体量程:0-8M分辨率:1mm精度:0.2%盲区:35cm供电:24VDC(标准);显示:清晰的多行文本图解显示、包络线显示输出:4-20mA过程连接:2”外壳材质:F16塑料透明显示盖优势特性是FMU231的理想升级替代品防护等级好,性价比高菜单引导功能,轻松实现现场操作典型应用污水提升泵站、污水处理池;废水、泥浆、石灰浆;地下油罐;流动性好的固体粉料、颗粒料[详细]
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2024-09-13 06:51
产品样册
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E+H FMU4X超声波液位计技术文章
- E+HFMU4X超声波液位计技术文章德国E+HE+H总代理现货E+HE+H上海E+H特价德国恩德斯豪斯主要产品为高端的温度计和温度变送器.其它产品包括:过程显示器、仪表连接器以及温度记录仪等等.除了标准产品外,我们还提供"顾客定制产品",以及解决特殊问题的"工程产品".追求zhuo越是我们的工作目标,我们致力为客户提供优质的产品和技术服务。欢迎来电或发传真咨询E+H恩格斯豪斯详细信息!E+HFMR250-A5E1GGJAA2ME+HFTM50-AGJ2A2A32AAE+HFTM50-AGJ2A2A52AAE+HDB50L-AC41BB13EG30E+HFMR245-54CQKAC4AE+HDC11TES-AC11B1BKS1L1=670mmE+HDC11TEN-AA11B1BKS1L=395mmE+HPMP46-RE17PBJCDGDE+HFMI51-L1AB3JA1AL=1200MME+HPTP31-A2A13S2AD1AE+HFMI52-A1AGEJB3A1AL=4.8ME+HDB53-AK71BC12GG20缆长5.0mE+HFTM51-AGG2M4A32AAL=400MME+HFTM51-AGG2L4A52AA L=400MME+HFTM51-AGG2L4A52AA L=650MME+HFMI52-A1AGEJB3A1A(L=4.8M)E+HDB53-AK71BC12BG20测5.5m缆6.5mE+HDB53-AK71BC12GG20测3.5M缆长5.0ME+HFTL51-AGR2BB4F6AL=150MME+HFTL51-AGE2DB7G4AE+HFMP40-ABB2CWJB21AAL=15ME+HFTL51-AGQ2BB2G4A L=148MME+HFMI51-A1AB2KB3A1AL=1500MME+HFTM51-G2L4AH7AAL=400mmE+HFTM20-4G42AE+HFTM50-AGG2A4A14AAE+HFMP40-AAA2CFJB21AAL=8ME+HFTM260-G4BE+HFTM50-AGG2A4A32AAE+HFTC260-AA4B1E+HFMP40-LBB2CQJB21HAL=12ME+HFTL50H-ATE2AD4G6AE+HFMI51-A1BGEJB3A1AL=410MME+HFMP40-AAA2AEJB11AA 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2024-09-13 06:50
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关于E+H超声波液位计的原理和应用资料下载
- E+H超声波物位计也称E+H超声波液位计,超声波水位计,超声波料位计。是一种优良的非接触的界面测量设备。适合石油、化工、自来水、污水处理、水利水文、钢铁、煤矿、电力、交通以及食品加工等行业。它安装,操作简便,适用性广,价格低廉。是一种物美价廉的物位物位、液位测量设备。E+H超声波物位计的原理:E+H超声波物位计安装于容器上部,在电子单元的控制下,探头向被测物体发射一束超声波脉冲。声波被物体表面反射,部分反射回波由探头接收并转换为电信号。从超声波发射到被重新被接收,其时间与探头至被测物体的距离成正比。电子单元检测该时间,并根据已知的声速计算出被测距离。用探头到罐底的距离-探头到液位的距离=实际液位或者物位高度。把液位高度转换成4~20mA电流信号、1~5V电压信号输出。或者通过485通信,Hart通信,GPRS通信传输到控制ZX。由于温度对声速具有较大的影响,所以仪表应测量环境温度,已修正声速。超声物位计的测量原理。二.E+H超声波物位计运用的系统框:在系统运用中,由E+H超声波物位计测量液位的高度并转换成标准信号送到控制ZX。控制ZX检测到仪表送来的液位信息,并根据液位的高度和实际需要来对加料或者减料进行控制。三.E+H超声物位计的主要的几个技术指标1、量程和盲区:量程和盲区是反映超声物位计的两个重要的指标。量程代表的是这个物位计能测量的Zda范围。反映的是换能器的灵敏度。也就是说,量程越大,灵敏度越高。大部分厂家标称的量程都是针对平整液面来说的,也就是说实际测量的时候,液位波动,表面有漂浮物,测量是固体料位,有粉尘,有蒸汽,都是有可能导致量程不能达到标称的值。比如50m量程的设备,如果测玉米的时候,实际只能测到20m.。盲区是反映换能器好坏的重要指标。盲区也成死区,超声液位计测量不到的一段距离,它是由于超声换能器的余震造成的。比如盲区30cm,也就是说,在液体更探头的距离小于30cm的时候,将会出现不能测量的情况。那么相同量程的产品,盲区越小,说明这个换能器的设计越好。对一些密闭罐体或者短量程的测量来说,安装会越方便。因此盲区成为相同量程产品衡量换能器做得好坏的一个重要指标。2、温度和精度。温度范围大部分标称是-20~60℃这个范围。因为大部分用液晶显示的物位计,液晶屏的工作温度只能在这个范围,超出这个范围,液晶显示都会出现不正常现象。如果不考虑液晶显示的限制,一般都可以做到-40~80℃的范围。压电陶瓷有个居里温度约300度。居里温度的一般是安全温度,所以一般情况下,超声换能器的工作温度很难超过150度。当超过150℃温度的时候,很容易对里面的压电陶瓷损坏。因此150度可以看成是一个破坏温度。另外超声波换能器制造过程用的部分材料,不能在100℃以上的温度长时间工作。大部分换能器的极限温度是100℃。为什么把精度和温度放在一起考虑,因为在空气中,温度测量误差1℃,对声速的影响是0.6m/S,20℃,1个大气压下声速约为340m/S。因此可以算出,对测量误差的影响是0.17%,也就是说,如果温度测量误差3℃,物位测量误差就超过大部分厂家0.5%的标称范围。因此实际0.5%的精度针对的是常温常压下的。对偏高和偏低的温度,都有可能导致测量精度超过0.5%的情况。有温度梯度,温度变化快的场合,测量误差也会因此增大。另外对测量精度影响Zda的是气体成份。也就是说在一些挥发性液体的场合,因为液体的挥发导致空气成分变化,接着导致气体声速变化引起的测量误差。3、压力。在负压的情况下,一般不推荐用超声测量,因为超声传播是通过气体来实现的。负压力意味着里面的空气稀薄,超声在稀薄空气下传播,一个是声速会变化,引起测量误差,二是稀薄空气里面,声波衰减增大,导致测量量程减小甚至不能测量。正压力主要是探头结构的影响,只要探头结构没有问题。不会引起漏气现象。那么在大的压力情况下超声物位计是可以工作的。4、腐蚀性:物位计的腐蚀性主要考验的是探头的材质。在弱酸弱碱的环境下,普通的塑料外壳就可以了。用聚四氟乙烯的外壳,可以耐大部分的强酸强碱。这里要注意的是,如果被测物质有比较强腐蚀性和挥发性,那么用一体物位计的时候,**把电路板进行胶峰。因为大部分的可以防水的壳体,都不能防气体。气体进入一体设备里面后,会俯视电路板。5、方向性和安装结构安装结构一般有法兰和螺纹两种安装方式。不推荐使用吊装。因为吊装容易受风的影响。但安装的时候,一般要考虑盲区的影响。我们要在物理上保证Z高液面到探头表面的距离大于盲区。为了避开盲区,用加长导管安装的时候,必须注意的是,探头辐射面两端与导管端面两端形成的夹角必须大于换能器的锐角度。(锐角度:波束两侧出现**个极小值之间的夹角)大部分物位计用的换能器都可以看成一个圆形活塞阵。那么锐角的角度可以通过下面的公式计算出来:换能器锐角的计算公式:θ=2arcsin(0.61λ/a)。产品标称的是一般换能器的半功率角。半功率角的计算公式为:θ-3dB=2arcsin(0.26λ/a)。这样就验证一下厂家标称的波束角是否是真实的。波束角不是越小越好,因为对大量程的产品来说,波束角太小,那么要垂直对准液面这比较困难。λ=波长=声速/频率a=半径,是换能器的辐射面的半径6、供电方式和信号输出方式:供电方式一般是交流电源95~230VAC,24VDC四线制,24VDC两线制三种。输出方式有:显示界面,电流4~20Ma,电压1-5V,通信方式485通信,Hart通信,GPRS通信等。三、超声物位计现场使用时候的安装注意事项1、垂直换能器安装的时候,要保证换能器的发射面和要被探测的平面平行,这样声波就可以垂直发射到被测物体表面。这样可以保证Zda的能量返回。技巧:如果现场环境有蒸汽,容易形成水珠附在探头的表面,并且探头的量成比实际要测量的距离大比较多。那么可以倾斜3度左右,这样可以避免水珠结水的影响。2、盲区Z高液位到E+H超声波液位计探头表面的距离应大于探头的盲区。这里需要注意的是:我们的盲区是在比较理想的状态下测得的。因此如果我们的安装的是封闭的罐体,那么盲区值**加大20%。如果因为液体会搅动,用了很长的导管来安装,那么盲区值**也加大20%为了避开盲区,我们经常会用加长导管的方式来避开盲在利用加长导管安装的时候,必须保证角度AOB?探头的锐角度。3、罐壁和障碍物如果罐壁是光滑的,并且液位降低的时候,不会出现挂料的情况,那么大部分距离灌壁30cm的距离安装就可以。如果灌壁是粗糙的,那么探头安装的位置要远离灌壁。灌底不是平面的,那么在零液位的时候可能出现误测。如果是圆锥型底面,可以考虑把探头安装在圆锥顶端正上方。对于圆形的横杆,只要距离超过1m,直径不超过5cm,影响不大。否则尽量避开。但对平面的横杆,灌壁有直角的情况,要尽量的避开。4、有搅拌和波动如果有搅拌或者波动的场合,可以用加长导管安装。导管直接申入液位底面。导管的直径只要大于探头的辐射面即可,但是要保证导管的内壁光滑,并且液位升降过程中不挂料,管内液体和管外一致。如果大量程不适合用导管安装的,可以减小量程使用,具体减小多少要看波浪的大小。[详细]
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2018-10-16 10:01
产品样册
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德国E+H超声波液位计FMU90-R11CA131AA1A技术资料
- 德国E+H超声波液位计FMU90-R11CA131AA1A技术资料 德国E+H超声波物位计: FMU90、FMU95 现场安装的超声波变送器,可用于物位与流量的测量,操作简单、灵活,功能强 应用 ProsonicFMU90/95超声波变送器是与ProsonicFDU91/91F/92/93/95/96系列传感器配套使用。 FMU90配备1个或2个超声波探头,FMU95配备5个或者10个超声波探头。 Zda量程范围70米 可进行限位测量(Z多可带6个继电器) 多级泵控制(交互),隔栅控制 可对明渠和测量堰中的介质进行流量测量 两种变送器都配有一体化的温度传感器,用于对时间行程测量原理的补偿。 产品性能 变送器可用于现场或控制室 有中文操作界面 通过内置或外置传感器进行超声波运行时间的修正。 提供的“TOF-Tool-FieldToolPackage”操作软件使用户能方便的对仪表进行调试。 常用的渠/堰的流量测量线形化表已预置,用户可以自由选择。 通过集成的流量曲线在线计算渠/堰中介质的流量。 通过HART或PROFIBUSDP的系统集成。 自动识别FDU9x系列探头 能与FDU8x系列探头配合使用 ProsonicFMU860...862超声波物位测量 应用 ProsonicFMU860...862超声波变送器是与ProsonicFDU80...86系列传感器配套使用。变送器确定筒仓或罐中的物位并计算出其中介质的体积。配备相应认证的探头,测量可在易爆危险区Zone1或易燃粉尘区进行。德国E+H超声波液位计FMU90-R11CA131AA1A技术资料 Prosonic应用于水和污水处理,用来测量: 开口渠和堰的流 液位 性能和优点 对特殊的应用可提供特殊的仪表 变送器的选择 用于现场或控制室 单或双通道型可带3获5个继电器,也可带累加器 可选择远程组态的串行接口(INTENSOR或HART协议) 带RS-485接口 智能化调试,完善超声波测量 采用简单的矩阵表来设定仪表参数 可随时调用各种线性化功能、累加器及常用的Q/h曲线 采用模糊逻辑和应用参数的信号形式识别,可以快速启动和测量 德国E+H超声波液位计FMU90-R11CA131AA1A技术资料[详细]
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2018-09-22 10:00
产品样册
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E+H超声波液位计全系列资料下载
- E+H超声波液位计全系列资料下载E+H(恩德斯豪斯)公司Z开始是销售一种英国产的新型电容式物位传感器,今天我们可以称之为“车库公司”,尽管它当初的办公室只是由一间卧室改建的。这种新型传感器很快取得了成功,公司的两位创始人迅速地开始构建他们自己的生产设施,从此,销售额持续增长。这时的销售范围,已经由早期主要集中在德国南部扩展到整个德国以及周边国家。他们开始经营电容式以外的其他不同原理的物位传感器产品。后来,其他测量领域的产品也开始研发、生产和销售,比如压力、流量、温度等等。销售和服务开始遍及整个西欧,并于20世纪70年代在美国和日本成立了首批海外办事处。20世纪80年代,E+H公司开始致力于应对“微电子技术”的挑战,并取得了技术上的领xian优势。随着过程自动化由“信号导向”转向“信息导向”,驱使E+H(恩德斯豪斯)积极参与不同现场总线协议的研发,今天,它已经在该领域成为的之一。E+H超声波液位计全系列资料下载1995年,71岁的h.c.GeorgH.Endress博士正式将公司的管理权移交给他的长子KlausEndress先生,在这之前,KlausEndress先生就已经担任公司的Z高执行总裁。总部位于瑞士的E+H公司在过去的十年里不断发展,如今成为专业为过程工业自动化提供传感器的制造商,为整个过程行业提供自动化解决方案和各种类型传感器的国际化领导厂商。公司成立54年后的今天,E+H在全部六大洲都设有分支机构,范围内拥有7,000多名员工,共同为市场上Z复杂的工业传感器系列提供广泛的生产、销售和服务。Endress+Hauser(恩德斯豪斯,简称E+H公司)是一家专业生产及销售工业自动化仪表的跨国集团公司,其产品覆盖了物位、压力、流量、分析、温度、系统及罐区、记录仪及通讯等工业测量仪表,是世界范围内自动化领域的之一。E+H公司创建于1953年,总部位于瑞士,在世界各地有40多个分支机构,有超过5,800名员工在进行研究、开发、生产、销售和维护工作。在德国、瑞士、法国、美国、日本等世界工业国成立了规模庞大的生产ZX,其严格的品质管理和完整的质保体系均已达到ISO9001国际标准。联系市场是开发高质量、高可靠性仪表的重要因素之一,40多年来,E+H(恩德斯豪斯)公司通过紧密联系市场,不断开发适销对路产品,受益匪浅,并已成为全方位的供应商。我公司专做欧美品牌,所有欧美品牌直接境外欧美国家采购,有自己的报关公司,货期可以缩短一半,价格更有优势。以下品牌是我公司优势品牌:一:德国HAWE德国REXROTH德国FESTO德国BURKERT德国E+H德国西门子德国STAUFF西德福德国SCHMERSAL德国NEGELE耐格德国EMG(只做SV伺服阀系列)德国STEIMEL德国赫斯曼德国MURR德国HYADC德国P+F德国TURCK图尔克德国SICK施克德国IFM博恩斯坦德国GSR德国PILZ德国MAHLE德国巴鲁夫德国冬斯德国劳易测德国Linde林德德国COAX二:意大利ATOS意大利UNIVER意大利杰弗伦英国海隆诺冠意大利万福乐法国高诺斯意大利康茂盛三:美国ASCOPARKER派克美国克力帕VICKERS威格士美国MOOG美国MAC美国纽曼帝克美国德威尔公司还有代理部分日本品牌(日本品牌直接办事处采购)如下:CKD喜开理,黑田精工,SUNX神视,TOYOOKI丰兴,NACHI不二越,DAIKIN大金,KOGANEI小金井,TACO,NOK,东京美。【我公司可以自己进口报关】E+H超声波液位计全系列资料下载[详细]
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2024-09-13 06:51
产品样册
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德国E+H超声波液位计资料下载
- 德国E+H超声波液位计资料下载 德国E+H流量计83F50-AFTSAAAAAAA,83F50-AFTSAAAAAAA质量流量计,流量计是过程自动化仪表与装置中的大类仪表之一,它被广泛适用于冶金、电力、煤炭、化工、石油、交通、建筑、轻纺、食品、医药、农业、环境保护及人民日常生活等国民经济各个领域。 订购流程: 1、客户确认所需采购产品型号发询价单传真 2、我方会根据询价单型号查询价格以及交货期,拟一份详细正规报价单 3,客户收到报价单并确认型号无误后订购产品 4、报价单负责人根据客户提供型号以及数量拟份销售合同 5、客户收到合同查阅同意后盖章回传并按照合同销售金额汇款到公司开户行 6、我公司财务查到款后,业务员安排发货并通知客户跟踪运单 公司本着:以更高品质的产品和服务,赢得客户Zda的满意为宗旨,依靠先进的现代企业管理不断深化企业内部改革,全面推行质量保证体系。提高产品质量,发扬“求实、创新、团结、进取”的精神,坚持“科技兴业、品牌兴业”方针,以自己品牌从ZG走向世界. 广东广联自动化设备公司以“优质产品,优质服务,以客为先”的宗旨,为客户提供原装正厂的优质产品,以合理的性价比,快捷的交货期,热情周到的服务,为客户提供高品质、经济耐用、品种齐全的产品,从而赢得客户的一致赞赏们将不负客户对本公司的期望和厚爱,努力为广大客户提供优质的产品、良好的售后服务,努力成为Zyou秀的自动化设备供应商。本公司所有产品假一赔十! 服务专员:赵春慧 电话:0769-22300608 传真:0769-22301098 手机:18928295235 QQ:1164523410 QQ:2359370157 邮箱:1164523410@qq.com 网址:http://www.dgpkgy.com/ 公司地址:广东省东莞市南城区宏远路1号宏远大厦13A--11 主营产品有:进口各种气缸、流量控制元件、电磁阀、压力控制元件、全气控阀、功率阀、消声器、检测元件、压缩空气清净化元件、真空用元件、气动辅助元件,传感器等,竭诚欢迎各位新老客户光临惠顾。德国E+H超声波液位计资料下载[详细]
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2024-09-13 06:51
产品样册
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E+H涡街流量计安装对环境有何要求
- E+H涡街流量计安装对环境有何要求E+H涡街流量计注意事项1、合理选择安装E+H涡街流量计场所和环境。避开强电力设备,高频设备,强电源开关设备;避开高温热源和辐射源的影响,避开强烈震动场所和强腐蚀环境等,同时要考虑安装维修方便。2、E+H涡街流量计上下游必须有足够的直管段。若传感器安装点的上游在同一平面上有二个90°弯头,则:上游直管段≥25D,下游直管段≥5D。若传感器安装点的上游在不同平面上有二个90°弯头,则:上游直管段≥40D,下游直管段≥5D。调节阀应安装在传感器的下游5D以外处,若必须安装在传感器的上游,传感器上游直管段应不小于50D,下游应有不小于5D。3、E+H涡街流量计安装点上下游的配管应与传感器同心,同轴偏差应不小于0.5DN。4、E+H涡街流量计管道采取减振动措施。传感器尽量避免安装在振动较强的管道上,特别是横向振动。若不得已要安装时,必须采取减振措施,在传感器的上下游2D处分别设置管道紧固装置,并加防振垫。5.E+H涡街流量计在水平管道上安装是流量传感器Z常用的安装方式。测量气体流量时,若被测气体中含有少量的液体,传感器应安装在管线的较高处。测量液体流量时,若被测液体中含有少量的气体,传感器应安装在管线的较低处。6.E+H涡街流量计传感器在垂直管道的安装。测量气体流量时,传感器可以安装在垂直管道上,流向不限。若被测气体中含有少量的液体,气体流向应由下向上。测量液体流量时,液体流向应由下向上:这样不会将液体重量额外附加在探头上。7、E+H涡街流量计传感器在水平管道的侧装。无论测量何种流体,传感器可以在水平管道上侧装,特别是测量过热蒸汽,饱和蒸汽和低温液体,若条件允许**采用侧装,这样流体的温度对放大器的影响较小。E+H涡街流量计的安装要求:A、安装在流速分布稳定的直管上,上游侧直管段长度应大于20D,下游侧直管段应大于5D;B、防止传感器产生机械振动;C、防止外部电磁场干扰;D、流量计**安装在调节阀、温度测点、压力测点的上游侧;E、流量计的尺寸应与管道内径相一致;F、流量计的ZX线应和管道的ZX线保持同心,并应防止垫片插入管道内部;G、E+H涡街流量计前后尽量不用截止阀。E+H涡街流量计的投用与使用方法:A、E+H涡街流量计投用前,应检查其安装是否符合要求、管道是否吹洗干净、压力试验是否已完成;B、投用后保证流量计满管运行;C、流量计停用后,应检查测量元件是否被沾污,及时对流量元件及其检测小孔进行清洗E+H涡街流量计安装对环境有何要求德国E+H涡街流量计是利用流体自然振荡的原理制成的一种旋涡分离型流量计,涡街频率和流体的流速成正比,常用的旋涡发生体为三角柱形,输出频率较低。用普升仪表E+H涡街流量计进行测量时要求流体的雷诺数在20000~7000000之间,且流速必须在规定范围内,不同的口径有不同的流速要求,对液相、气相、蒸汽的流速要求各不相同;仪表有直管段要求,一般用于清洁低粘度介质测量,测量精度为1%。E+H涡街流量计特点一、结构简单而牢固,无可动部件,可靠性高,长期运行十分可靠。二、安装简单,维护十分方便。三、检测传感器不直接接触被测介质,性能稳定,寿命长。四、输出是与流量成正比的脉冲信号,无零点漂移,精度高。五、测量范围宽,量程比可达1:10。六、压力损失较小,运行费用低,更具节能意义。E+H涡街流量计在一定的雷诺数范围内,输出信号频率不受流体物理性质和组份变化的影响,仪表系数仅与旋涡发生体的形状和尺寸有关,测量流体体积流量时无需补偿,调换配件后一般无需重新标定仪表系数。E+H涡街流量计应用范围广,蒸汽、气体、液体的流量均可测量。E+H涡街流量计安装对环境有何要求[详细]
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2018-09-21 10:01
产品样册
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E+H涡街流量计特点及安装注意事项
- E+H涡街流量计特点及安装注意事项E+H涡街流量计注意事项1、合理选择安装E+H涡街流量计场所和环境。避开强电力设备,高频设备,强电源开关设备;避开高温热源和辐射源的影响,避开强烈震动场所和强腐蚀环境等,同时要考虑安装维修方便。2、E+H涡街流量计上下游必须有足够的直管段。若传感器安装点的上游在同一平面上有二个90°弯头,则:上游直管段≥25D,下游直管段≥5D。若传感器安装点的上游在不同平面上有二个90°弯头,则:上游直管段≥40D,下游直管段≥5D。调节阀应安装在传感器的下游5D以外处,若必须安装在传感器的上游,传感器上游直管段应不小于50D,下游应有不小于5D。3、E+H涡街流量计安装点上下游的配管应与传感器同心,同轴偏差应不小于0.5DN。4、E+H涡街流量计管道采取减振动措施。传感器尽量避免安装在振动较强的管道上,特别是横向振动。若不得已要安装时,必须采取减振措施,在传感器的上下游2D处分别设置管道紧固装置,并加防振垫。5.E+H涡街流量计在水平管道上安装是流量传感器Z常用的安装方式。测量气体流量时,若被测气体中含有少量的液体,传感器应安装在管线的较高处。测量液体流量时,若被测液体中含有少量的气体,传感器应安装在管线的较低处。6.E+H涡街流量计传感器在垂直管道的安装。测量气体流量时,传感器可以安装在垂直管道上,流向不限。若被测气体中含有少量的液体,气体流向应由下向上。测量液体流量时,液体流向应由下向上:这样不会将液体重量额外附加在探头上。7、E+H涡街流量计传感器在水平管道的侧装。无论测量何种流体,传感器可以在水平管道上侧装,特别是测量过热蒸汽,饱和蒸汽和低温液体,若条件允许**采用侧装,这样流体的温度对放大器的影响较小。E+H涡街流量计特点及安装注意事项E+H涡街流量计是利用流体自然振荡的原理制成的一种旋涡分离型流量计,涡街频率和流体的流速成正比,常用的旋涡发生体为三角柱形,输出频率较低。用普升仪表E+H涡街流量计进行测量时要求流体的雷诺数在20000~7000000之间,且流速必须在规定范围内,不同的口径有不同的流速要求,对液相、气相、蒸汽的流速要求各不相同;仪表有直管段要求,一般用于清洁低粘度介质测量,测量精度为1%。E+H涡街流量计特点一、结构简单而牢固,无可动部件,可靠性高,长期运行十分可靠。二、安装简单,维护十分方便。三、检测传感器不直接接触被测介质,性能稳定,寿命长。四、输出是与流量成正比的脉冲信号,无零点漂移,精度高。五、测量范围宽,量程比可达1:10。六、压力损失较小,运行费用低,更具节能意义。E+H涡街流量计的安装要求:A、安装在流速分布稳定的直管上,上游侧直管段长度应大于20D,下游侧直管段应大于5D;B、防止传感器产生机械振动;C、防止外部电磁场干扰;D、流量计**安装在调节阀、温度测点、压力测点的上游侧;E、流量计的尺寸应与管道内径相一致;F、流量计的ZX线应和管道的ZX线保持同心,并应防止垫片插入管道内部;G、E+H涡街流量计前后尽量不用截止阀。E+H涡街流量计的投用与使用方法:A、E+H涡街流量计投用前,应检查其安装是否符合要求、管道是否吹洗干净、压力试验是否已完成;B、投用后保证流量计满管运行;C、流量计停用后,应检查测量元件是否被沾污,及时对流量元件及其检测小孔进行清洗E+H涡街流量计特点及安装注意事项[详细]
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2018-09-21 10:01
产品样册
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E+H超声波液位计FMU30系列选型资料
- E+H超声波液位计FMU30系列选型资料E+H超声波液位计智能型一体化非接触式连续物位测量仪,适用于各种过程控制系统。ProsonicT适用于对液体及颗粒料位进行非接触式连续物位测量的一体化仪表。有两种不同测量范围的变送器可供选择。E+H超声波液位计优势特性:是FMU230、FMU231的理想升级替代品,并且备有大量现货,防护等级好,性价比,菜单引导功能,轻松实现现场操作FMU30系列超声波液位计详细参数液体量程:0-5M;0-8M分辨率:1mm精度:±3mmor0.2%盲区:25cmor35cm供电:24VDC(标准);220VAC(可选)显示:清晰的多行文本图解显示、包络线显示输出:4-20mA过程连接:1-1/2”(5m),2”(8m)外壳材质:F16塑料透明显示盖防护等级:IP68E+H超声波流量计超声波流量计E+H质量流量计e+h电磁流量计[详细]
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2018-09-26 10:00
产品样册
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E+H超声波液位计FMU40一1RB2A2说明书
- E+H超声波液位计FMU40一1RB2A2说明书E+H超声波物位计:非接触式测量。适合各种液体和固体,同样包括侵蚀性介质及变介电常数介质。耐温达150度,耐压达3bar。型号有:FMU230/231,FDU91,FDU92,FDU93,FDU95,FDU96,FMU40/41,FMU42,FMU43。E+H超声波液位计FMU40一1RB2A2性能和优点菜单是引导现场操作,四行文本显示现场显示包络线进行诊断附送ToFTool操作软件,可进行操作与诊断旋转IP68铝外壳可进行远程操作和显示过程连接有G1?"或1?NPT"螺纹连接内部集成的温度传感器可对超声波运行时间内的温度变化进行补偿,以实现极ng确测量测量值线性化(可达32个点),单位可以是长度、流量或流速非接触式测量,不受介质特性影响E+H超声波液位计FMU40一1RB2A2说明书我公司专做欧美品牌,所有欧美品牌直接境外欧美国家采购,本公司可以直接报关,货期可以缩短一半,价格更有优势可以为您争取更大的利润空间。如有需要请直接电话联系或直接来本公司视察:以下品牌是我公司优势品牌:一:德国HAWE德国REXROTH德国FESTO德国BURKERT德国E+H德国西门子德国STAUFF西德福德国SCHMERSAL德国NEGELE耐格德国EMG(只做SV伺服阀系列)德国STEIMEL德国赫斯曼德国MURR德国HYADC德国P+F德国TURCK图尔克德国SICK施克德国IFM博恩斯坦德国GSR德国PILZ德国MAHLE德国巴鲁夫德国冬斯德国劳易测德国Linde林德德国COAX二:意大利ATOS意大利UNIVER意大利杰弗伦英国海隆诺冠意大利万福乐法国高诺斯意大利康茂盛三:美国ASCOPARKER派克美国克力帕VICKERS威格士美国MOOG美国MAC美国纽曼帝克美国德威尔公司还有代理部分日本品牌(日本品牌直接办事处采购)如下:CKD喜开理,黑田精工,SUNX神视,TOYOOKI丰兴,NACHI不二越,DAIKIN大金,KOGANEI小金井,TACO,NOK,东京美。【我公司可以自己进口报关】E+H超声波液位计FMU40一1RB2A2说明书[详细]
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2018-10-06 10:01
产品样册
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E+H超声波液位计FMU40系列选型资料
- E+H超声波液位计FMU40系列选型资料FMU40超声波物位计产品简介智能型一体化非接触式连续物位测量仪,适用于液体、浆料和粗料的测量E+H液位计E+H物位计德国E+HE+H总代理FMU40超声波物位计产品应用连续非接触式物位测量,适用于液体、浆料和粗料的测量明渠,堰中的流量测量通过HART(4...20mA),PROFIBUSPA或基金会现场总线进行系统集成Zda测量范围:FMU40固体测量范围:2m液体测量范围:5mFMU41固体测量范围:3.5m液体测量范围:8mFMU42固体测量范围:5m液体测量范围:10mFMU43固体测量范围:7m液体测量范围:15mE+H液位计E+H物位计德国E+HE+H总代理FMU40超声波物位计产品性能菜单是引导现场操作,四行文本显示现场显示包络线进行诊断附送ToFTool操作软件,可进行操作与诊断旋转IP68铝外壳可进行远程操作和显示过程连接有G1或1NPT螺纹连接内部集成的温度传感器可对超声波运行时间内的温度变化进行补偿,以实现极ng确测量测量值线性化(可达32个点),单位可以是长度、流量或流速非接触式测量,不受介质特性影响FMU40超声波物位计E+H液位计E+H物位计德国E+HE+H总代理[详细]
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2024-09-13 06:51
产品样册
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E+H超声波流量计的应用范围及安装注意事项
- E+H超声波流量计,具有测量精度高,一致性好、电池供电时间长,操作简单,内置一体式打印机等优点,适用于各种工业现场中液体流量的在线标定和巡检测量。在安装E+H超声波流量计的时候,选择安装管段对测试精度影响很大,所选管段应避开干扰和涡流这两种对测量精度影响较大的情况,一般选择管段应满足下列条件:1、避免在水泵、大功率电台、变频,即有强磁场和震动干扰处安装机器;2、选择管材应均匀致密,易于超声波传输的管段;3、要有足够长的直管段,安装点上游直管段必须要大于10D(注:D=直径),下游要大于5D;4、安装点上游距水泵应有30D距离;5、流体应充满管道。以上是小编为大家介绍的关于E+H超声波流量计选择安装管段应该注意到的地方,希望对大家的使用有所帮助。另外,为了加深大家对E+H超声波流量计的认识,我再为大家介绍一下E+H超声波流量计的应用范围。随着石油和天然气工业的强势增长,以及行业对于现场设备技术的逐步接受,E+H超声波流量计的市场总额将在今后5年内以9.6%的复合年增长率(CAGR)增长。ARCAdvisoryGroupZ近的一份报告指出,2005年该市场总值为2.75亿美元,到2010年将超过4.34亿美元。E+H超声波流量计正在快速发展成为流量测量领域,尤其是计量碳氢化合物的。ARC这份名为《世界E+H超声波流量计前景展望》的主要作者、自动化分析师AllenAvery表示:“尽管超声波流量测量技术的出现已经有数十年了,其应用范围却非常小。而随着用户逐渐认识到E+H超声波流量计的众多优点,包括高极ng确度、无阻碍测量以及较低的总体拥有成本等,这一情况将逐渐改观。”在石油和天然气领域快速普及Z近几年E+H超声波流量计市场的一切增长,几乎都是由于这种产品在石油和天然气领域销量的增加而带来的??E+H超声波流量计在这一领域的销量比起以前将近翻了一倍。由于AGA9监护运输标准的推广,天然气的监护运输市场已经基本成形。在2003年到2005年间,监护运输量增加了三倍多,而这一领域占E+H超声波流量计销售的5%。只有液体碳氢化合物监护运输的API和OIML标准在行业内得到推广,E+H超声波流量计才能在这个领域普及。E+H超声波流量计具有高极ng确度和低总体拥有成本不论是从技术上还是从经济上看,超声波测量仪器都是流量测量的理想选择。通过多光束和数字信号处理,超声波测量仪可以实现很高的测量极ng确度。与传统的涡轮式仪表不同,它没有移动的元件,因此几乎不需要维修。而且,它也不会阻挡或者减慢管道中气体或者液体的流动。它能够准确地测量液态石油气产品的宽频,而不需像机械型技术那样得到验证。高灵敏度使其可以检测到管道中的任何泄漏,并可以测量和补充各种会影响监护运输领域中的测量准确度的变量。亚洲和中东市场增长Zda亚洲和中东地区E+H超声波流量计的增长将会是Zda的。ZG和印度将会在基础设施和新工厂上大举投资。ZG能源缺乏,为了寻找推动经济快速发展的能源,将会对其石油和天然气基础设施进行改造,并建立连接俄罗斯及其它地区供油商的管道。而由于中东地区在石油和天然气生产中的地位,这一地区将仍然是E+H超声波流量计供应商的沃土。这一地区亦将在数个大型发电及海水淡化厂上进行投资。相比之下,北美市场的增长则显得相对平淡,但由于这一地区在石油和天然气基础设施及工业自动化上的投资,北美市场将仍然具有可观的增长。如果您有需要E+H产品,欢迎来电咨询采购。[详细]
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2018-10-16 10:01
产品样册
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EPRO传感器安装原理及应用
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EPRO传感器安装原理及应用EPRO传感器是一种检测装置,EPRO传感器能感受到被测量的信息,EPRO传感器并能将感受到的信息,EPRO传感器按一定规律变换成为电信号或其他所需形式的信息输出,EPRO传感器以满足信息的传输、处理、存储、显示、记录和控制等要求。EPRO传感器EPRO传感器的特点包括:微型化、数字化、智能化、多功能化、系统化、网络化。它是实现自动检测和自动控制的S要环节。传感器的存在和发展,让物体有了触觉、味觉和嗅觉等感官,让物体慢慢变得活了起来。EPRO传感器通常根据其基本感知功能分为热敏元件、EPRO光敏元件、EPRO气敏元件、EPRO力敏元件、EPRO磁敏元件、EPRO湿敏元件、EPRO声敏元件、EPRO放射线敏感元件、色敏元件和味敏元件等十大类。EPRO传感器安装原理及应用EPRO传感器按用途:EPRO压力敏和EPRO力敏传感器、EPRO位置传感器、EPRO液位传感器、EPRO能耗传感器、EPRO速度传感器、EPRO加速度传感器、EPRO射线辐射传感器、EPRO热敏传感器。EPRO传感器:能感受规定的被测量并按照一定的规律转换成可用输出信号的器件或装置。通常有敏感元件和转换元件组成。1)敏感元件是指传感器中能直接(或响应)被测量的部分。EPRO传感器2)转换元件指传感器中能较敏感元件感受(或响应)的被测量转换成是与EPRO传感器传输和(或)测量的电信号部分。2、测量范围:在允许误差限内被测量值的范围。EPRO传感器3、量程:EPRO传感器测量范围上限值和下限值的代数差。4、极ng确度:被测量的测量结果与真值间的一致程度。EPRO传感器原装进口EPRO传感器厂价直销EPRO传感器ZG总代理EPRO传感器型号如下:PR6202/50tC3PR6202/50tC3EPR6202/50tC4PR6202/50tC4EPR6202/6tC1PR6202/6tC1EPR6202/6tC3PR6202/6tC3EPR6202/6tC4PR6202/6tC4EPR6002/00SPR6002/01SPR6002/02SPR6002/03SPR6002/04SPR6002/05SPR6002/10SPR6002/11SPR6002/20SPR6002/21SPR6207/11C3PR6207/11D1PR6207/12C3PR6207/12D1PR6207/21C3PR6207/21D1PR6207/22C3PR6207/22D1PR6207/51C3PR6207/51D1PR6007/00NPR6007/00SPR6211/12D1PR6211/13D1PR6211/13D1EPR6211/13LTPR6211/14D1PR6211/14D1EPR6211/22D1PR6211/23D1PR6211/23D1EPR6211/23LTPR6211/31D1PR6211/32D1PR6211/33D1PR6211/33D1EPR6211/51D1PR6211/52D1PR6211/52D1EPR6211/52LTPR6211/53D1PR6211/53D1EPR6211/53LTPR6011/00NPR6011/00SPR6011/03NPR6011/10NPR6011/10SPR6011/11NPR6011/11SPR6011/20NPR6011/20SPR6011/30NPR6011/30SPR6011/40NPR6011/40SPR6221/20tC3PR6221/20tC3PR6221/20tC4PR6221/20tC4EPR6221/20tC5PR6221/20tC5EPR6221/20tC6PR6221/20tC6EPR6221/25tC3PR6221/25tC3EPR6221/25tC4PR6221/25tC4EPR6221/25tC5PR6221/25tC5EPR6221/25tC6PR6221/25tC6EPR6221/30tC3PR6221/30tC3EPR6221/30tC4PR6221/30tC4EPR6221/30tC5PR6221/30tC5EPR6221/30tC6PR6221/30tC6EPR6221/50tC3PR6221/50tC3EPR6221/50tC4EPR6221/50tC5PR6221/50tC5EPR6221/60tC3PR6221/60tC3EPR6221/60tC4PR6221/60tC4EPR6221/60tC5PR6221/60tC5EPR6221/75tC3PR6221/75tC3EPR6221/75tC4PR6221/75tC4EPR6221/75tC5PR6221/75tC5EPR6021/00NPR6021/01NPR6021/08EPRO传感器原装进口EPRO传感器厂价直销EPRO传感器ZG总代理PR6021/68SPR6241/12D1PR6241/12D1EPR6241/13C3PR6241/13C3EPR6241/13C6PR6241/13C6EPR6241/13D1PR6241/13D1EPR6241/22C3PR6241/22C3EPR6241/22C6PR6241/22C6EPR6241/22D1PR6241/22D1EPR6241/23C3PR6241/23C3EPR6241/23C6PR6241/23C6EPR6241/23D1PR6241/23D1EPR6241/32C3PR6241/32C3EPR6241/32C6PR6241/32C6EPR6241/32D1PR6241/32D1EPR6241/33C3PR6241/33C3EPR6241/33C6PR6241/33C6EPR6241/33D1PR6241/33D1EPR6241/52C3PR6241/52C3EPR6241/52C6PR6241/52C6EPR6241/52D1PR6241/52D1EPR6241/53C3PR6241/53C3EPR6241/53D1PR6241/53D1EPR6041/03NPR6041/30NPR6041/30SPR6041/40NPR6041/40SPR6041/51SPR6043/30NPR6043/30SPR6043/31SPR6043/40NPR6043/40SPR6246/12D1PR6246/12D1EPR6246/13C3PR6246/13C3EPR6246/13C6PR6246/13C6EPR6246/13D1PR6246/13D1EPR6246/22C3PR6246/22C3EPR6246/22C6PR6246/22C6EPR6246/22D1PR6246/22D1PR6246/23C3PR6246/23C3EPR6246/23C6PR6246/23C6EPR6246/23D1PR6246/23D1EPR6246/32C3PR6246/32C3EPR6246/32C6PR6246/32C6EPR6246/32D1PR6246/32D1EPR6246/33C3PR6246/33C3EPR6246/33C6PR6246/33C6EPR6246/33D1PR6246/33D1EEPRO传感器原装进口EPRO传感器厂价直销EPRO传感器ZG总代理PR6246/52C3PR6246/52C3EPR6246/52C6PR6246/52C6EPR6246/52D1PR6246/52D1EPR6046/00NPR6046/00SPR6046/11NPR6046/11SPR6251/13LPR6251/13LAPR6251/13LACPR6251/13LEPR6251/14LPR6251/14LAPR6251/14LACPR6251/14LEPR6251/23LPR6251/23LAPR6251/23LACPR6251/23LEPR6251/24LPR6251/24LAPR6251/24LACPR6251/24LEPR6251/33LPR6251/33LAPR6251/33LACPR6251/33LEPR6251/52LPR6251/52LAPR6251/52LACPR6251/52LEPR6251/53LPR6251/53LAPR6251/53LACPR6251/53LEPR6051/00SPR6051/02PR6051/10SPR6051/11SPR6151/05C1PR6151/05C2PR6151/11C1PR6151/11C2PR6151/21C1PR6151/21C2PR6151/31C1PR6151/31C2PR6151/51C1PR6151/51C2PR6130/04NPR6130/08PR6130/64SPR6130/68SPR6135/01PR6135/01APR6135/11PR6135/12PR6135/21PR6135/22APR6135/31PR6135/32PR6135/51PR6136/01PR6136/01APR6136/12PR6136/22APR6136/32PR6136/51PR6201/13D1PR6201/13LPR6201/13LAPR6201/14C3PR6201/14C3EPR6201/14D1PR6201/14D1EPR6201/14LPR6201/14LAPR6201/15LPR6201/15LAPR6201/15NPR6201/15NEPR6201/13D1EPR6201/23C3PR6201/23C3EPR6201/23D1PR6201/23D1EPR6201/23LPR6201/23LAPR6201/24C3PR6201/24C3EPR6201/24C4PR6201/24C4EPR6201/24C5PR6201/24C5EPR6201/24C6PR6201/24C6EPR6201/24D1PR6201/24D1EPR6201/24LPR6201/24LAPR6201/25LAPR6201/25NPR6201/25NEPR6201/35NPR6201/35NEPR6201/54D1PR6201/33C3PR6201/33C3EPR6201/33D1PR6201/33D1EPR6201/33LPR6201/33LAEPRO传感器安装原理及应用EPRO传感器使用说明EPRO传感器早已渗透到诸如工业生产、宇宙开发、海洋探测、环境保护、资源调查、医学诊断、生物工程、甚至文物保护等等极其之泛的领域。EPRO传感器可以毫不夸张地说,从茫茫的太空,到浩瀚的海洋,以至各种复杂的工程系统,几乎每一个现代化项目,都离不开各种各样的EPRO传感器。由此可见,EPRO传感器技术在发展经济、推动社会进步方面的重要作用,是十分明显的。世界各国都十分重视这一领域的发展。相信不久的将来,EPRO传感器技术将会出现一个飞跃,EPRO传感器达到与其重要地位相称的新水平。EPRO传感器的特点包括:微型化、数字化、智能化、多功能化、系统化、网络化,它不仅促进了传统产业的改造和更新换代,而且还可能建立新型工业,EPRO?传感器从而成为21世纪新的经济增长点。微型化是建立在微电子机械系统(MEMS)技术基础上的,EPRO?传感器已成功应用在硅器件上做成硅压力传感器。我们公司代理以下优势品牌:1.品牌:、德国力士乐REXROTH、德国费斯托FESTO、德国宝德BURKERT、德国贺德克HYDAC、德国倍加福P+F、德国图尔克TURCK、德国施克SICK、德国易福门IFM、德国GSR、德国PILZ、德国巴鲁夫BALLUFF、EPRO.,德国西门子。德国哈威HAWE等2.美国阿斯卡ASCO、美国派克PARKER、美国威格士VICKERS、、美国MAC、美国纽曼蒂克NUMATICS.3.意大利ATOS、意大利杰弗伦GEFRAN、英国海隆诺冠、法国高诺斯等.4.日本CKD\日本SMC、日本丰兴、日本大金、日本不二越、日本黑田精工、日本太阳铁工、东京美我公司在德国及美国都有注册公司,直接与国外厂家合作,价格和货期都有非常好的优势,产品保证原装的,各新老客户有需要随时可联系我们[详细]
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2018-09-07 10:00
产品样册
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Kistler力传感器安装及校准原理
- Kistler力传感器安装及校准原理Kistler力传感器设置SlimLine集成的单组分SlimLine力传感器9130BA_000-694e-11.139130BA型...到9137BA...即插即用的紧凑型装配套件,集成单组件SlimLine(SL)力传感器。2,3或4超平石英传感器包含在一个固定的连接。测量总力(总信号)或分力(个别)信号)可以通过适当的连接进行电缆。SlimLine套件是未经校准的。传感器必须是安装后就地校准。?结构灵活紧凑的安装?总信号或单个信号?可以为每个传感器选择电缆长度?传感器地平面Kistler力传感器描述SlimLine套件由连接2,3或4个SLS传感器组成地连接到连接器。传感器的电缆长度可以在0.1米和2米之间单独选择。要测量的总力F被施加到传感器通过特殊的预张紧或适合的元素。每个加载传感器产生与其力成比例的电荷零件。电荷信号通过电极输出和集成电缆。SL套件中的各个传感器电缆是预先连接的到一个特殊的7极连接器。传感器信号是单独馈送到相应的插针位置。进一步信号处理可以通过适当的连接来确定电缆。以下版本是可能的:?总信号(通过连接电缆类型1971A...,连接器并联连接):测量总力F.分力每个传感器相加以给出总力?单个信号(通过1973A型连接电缆,连接器串联连接):测量比力(力分量)的作用在个人传感器上Kistler力传感器安装及校准原理Kistler力传感器应用由于其极高的刚性,SlimLine传感器尤其如此适合测量快速变化的力量。准几分钟的准静态测量是可能的。SL组件特别适用于测量的力量分流模式。这意味着传感器是嵌入和预紧在一个/一个环境/周围结构体。由于其小巧的设计,传感器可以安装在结构上,如力盘,装配带和后续工具。该传感器用于工业生产过程必须监视或测量力量。连接到一个控制监视器,这个传感器是理想的质量控制和监控生产系列。应用示例?监控压力,冲压力等?监控后续工具?测量大力量分流?安装在尺寸小的测力计上技术数据SlimLine套件SlimLine范围过载灵敏度传感器(kN)(kN)(pC/N)9130BA...9130B...0...3,03,5≈-3,59132BA...9132B...0...7,08≈-3,89133BA...9133B...0...1417≈-3,89134BA...9134B...0...2630≈-3,89135BA...9135B...0...3642≈-3,89136BA...9136B...0...6272≈-3,89137BA...9Kistler力传感器安装及校准原理[详细]
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2018-09-21 10:00
产品样册
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