西门子PLC模块414-2XL07-0AB0

414-2XL07-0AB0

414-2XL07-0AB0

414-2XL07-0AB0

414-2XL07-0AB0

AM600-CPU1608TP       1

R432008635    1  沙特阿拉伯

6ZB2410-0BM00   1

C200H-MC221   1  

FR-D740-036SC-EC 1

FR-ABR-H1.5K, IP20 1

FFR-CSH-036-8A-RF1-LL 1

FR-ABR-H3.7K, IP20 2

FR-D740-080SC-EC 2

FR-ABR-H5.5K, IP20 1

FR-D740-120SC-EC 1

FFR-CSH-080-16A-RF1-LL 2

FFR-MSH-170-30A-RF1 1

FR-ABR-H3.7K, IP20 6

FR-D740-080SC-EC 6

FFR-CSH-080-16A-RF1-LL

TM258LF66DT4L      1

6ES7138-4DB03-0AB0   1

S55451-D301-A100    2

S55451-D302-A100    1

kv-24dt  6个

1 MP 210 A4R-210 A75KW MENTOR Drive?/变频器

2 MP210-210A 75 KW MENTOR Drive

各1

NZ2GFCF-D62PD2   2

315-2EH13-0AB0    2

307-1BA00-0AA0    2

321-1BH00-0AA0   2

953-8LJ11-0AA0    2

390-1AF30-0AA0   2

Meggitt 244-127-000-017-A2-B02  2

Meggitt 244-127-000-017-A2-B01   6

Schneider 1009018  1

Schneider EZM3EXT  6

QOGP3P6036P Schneider  1

414-2XL07-0AB0

NDIR系统存在的一个主要问题是随着时间的推移，如何准确地知道发送给检测器的光线变化是否真的因气体吸收所引起，而不是光源变化或者舱室污染所引起。尽管在NDIR系统工作之初进行校正是可能的，但是为了应对随着时间推移而出现的光源变化和舱室污染问题，要求不断进行校准。这样做成本很高昂、耗费时间，并且在长期现场运行过程中也不可行。解决这个问题的一个方法是，在你的系统中使用一条基准通道。该基准通道包含一个检测器，在没有光线吸收的范围内测量光源。现在，气体浓度由两个发送光量之比来决定。光源偏差引起的任何误差现在都被抵消。这种偏差导致长期漂移，其出现在较大的时间段内。因此，无需同时对基准和有源通道进行采样。你可以使用一个输入多路复用器(MUX)来在两条通道之间切换，从而降低系统成本和复杂程度，并同时维持度

在NDIR系统中用作红外检测器的热电堆根据其接收的入射光多少(单位为瓦特)来产生电压。被测气体类型、其吸光系数和气体浓度范围都影响热电堆检测器的入射光线量。它产生热电堆输出电压(范围通常为数十μV)。因此，你需要设计出具有使用不同增益放大热电堆输出电压功能的电子支持组件。可以通过一个含内置PGA的模拟前端(AFE)来处理这种情况。要求使用数百到数千V/V范围的增益设置，来把小热电堆信号放大到系统全刻度模数转换器(ADC)，从而实现大系统度。

HP HEWLETT PACKARD E3633A/E3634A POWER SUPPLY GUIDE

MGPC4269B7 715P1114-E-LG/A IMAGE BOARD FROM HEWLETT PACKARD HP PE0000

HP Hewlett Packard E4401-60006, A-3634 Board

E4916A HP Hewlett Packard Impedance / LCR Meter Used

From Thailand

E4916A HP Hewlett Packard Impedance / LCR Meter Used

From Thailand

Newly listedHewlett-Packard AND Agilent E3243A MICROPHONE/BREAKOUT BOX User's Guide HP Exc!

HP Hewlett Packard E4401-60017, A3638 Monochrome FPI Board

HEWLETT PACKARD HP E3610A DC POWER SUPPLY

HP HEWLETT PACKARD 82143A PERIPHERAL PRINTER - e

Hewlett-Packard HP Advanced Docking Station A7E38AA

From Italy

HEWLETT PACKARD A7H84UA#ABA HP AP5000 INTEL CORE 2 DUO E7400 CPU 250GB HDD

HP Hewlett Packard E4411-60001, E4401-20009, A-3619 Raw Board

HP Advanced Docking Station Hewlett & Packard A7E38AA

From Germany

Hewlett-Packard HP Officejet 6600 e-All-in Stampante Multifunzione inkjet CZ155A

From Italy

HP E1333A 3-Channel Universal Counter 1GHz VXI Bus Hewlett Packard 75000 SeriesB

Genuine NEW HP (Hewlett-Packard) A7E32AA#ABA 90W Docking Station

Hewlett-Packard HP Modulo di espansione 24 porte per HP E5406, E per Rete J9537A

From Italy

HP(HEWLETT PACKARD) E3615A 0-20V, 0-3A DC POWER SUPPLY

Hewlett-Packard HP 2012 120W Advanced Docking Station D per Notebook A7E36AA#ABB

From Italy

Hewlett-Packard HP 230Watt Docking Station A7E34AA

From Italy

Hewlett Packard A8002B Hp Fc2142sr 4gb Pci-e Hba

Newly listedHewlett Packard HP OfficeJet 7000 Tintenstrahldrucker (E809a) DIN A3+ OVP + NEU

From Germany

Hewlett Packard Aj763a Hp 82e 8gb Dual-port Pci-e Fc Hba

HP 230Watt Docking Station Hewlett & Packard A7E34AA

From Germany

Hewlett Packard A8002a Hp Fc2142sr 4gb Pci-e Hba

HP HEWLETT PACKARD 64 CHANNEL SCANNING A/B E1413A/B

HEWLETT PACKARD E2071/82341 HP-IB CARD HP 09L 9 REV A E2073-66501 4QX037M

Hewlett Packard HP E4821A Parallel Cell Gen/Analyzer

Hewlett-Packard HP StorageWorks 81Q PCI-e Fibre Channel Hos per Server PC AK344A

From Italy

HP HEWLETT PACKARD VXI E1488A - HP 75000 SERIES C INSTRUMENT MEMORY

Hewlett Packard HP E3468A Emulation Probe

NEW HEWLETT PACKARD A7E34AA#ABA HP 2012 230W Docking Station

Hewlett Packard Ae311a Hp Fc1142sr 4gb Pci-e Hba

HP E1340A 12-bit 42MSa/S Arbitrary Function Generator VXI Bus Hewlett Packard

HP (HEWLETT PACKARD) E3615A 0-20V, 0-3A DC POWER SUPPLY

HP E7024A E6978-68542 DUAL CHANNEL FIBER OPTIC PCI INTERFACE

Agilent E6978-68515 E6978-66715 with 60 day warranty

Agilent E6978-66415 E6978-66715 with 60 day warranty

Agilent E7024A E6978-68543 PCI Dual Fibre Channel Card

Apple Video Card 631-0063 630-6978 Nvidia PCI-e PowerMac G5 256MB

Eureka Model 6978, 6982 Electric Hose E-60540-1

Agilent E6978-69515 with 60 day warranty

E6978 VT, Grafton Birds Eye View Postcard

HP Hewlett Packard E6978-66502 with 60 day warranty

HP Hewlett Packard E6978-61698 with 60 day warranty

Apple 631-0063 630-6978 Power Mac G5 A386 256MB PCI-E Dual DVI Graphics Card

Allen-Bradley Line Reactor 1321-3RA160-B, 160A 600V 3PH 50/60Hz

ALLEN BRADLEY 1321-3RB250-B FNFP 13213RB250B

3 in. Charleston Blacksmith Refined Bronze Cabinet Pull (Set of 10) - PA1321-RB

ALLEN BRADLEY 1321-3RA160B 160A LINE REACTOR ***XLNT***

Allen Bradley #1321-3RAB250-B Line Reactor TRS/30

1" x 3/4" Reducing Bushing by Thomas & Betts RB1321

Allen Bradley 1321-3R160-C Line Reactor with 6 lugs (Used)

From Canada

ALLEN BRADLEY 1321-3RB-C *USED*

NEW ALLEN BRADLEY POWER CONDITIONER LINE REACTOR 3 PHASE 8 AMP 1321-3RA8-B

Allen Bradley 1321-3R100-B Line Reactor

Allen Bradley Transformer 1321-3R35-B 3 Phase 600 V