DCS或TDCS
（1）分散控制系统DCS与集散控制系统TDCS是集4C（Communication，Computer， Control、CRT）技术于一身的监控技术。
（2）从上到下的树状拓扑大系统，其中通信（Communication）是关键。
（3）PID在中断站中，中断站联接计算机与现场仪器仪表与控制装置。
（4）是树状拓扑和并行连续的链路结构，也有大量电缆从中继站并行到现场仪器仪表。
（5）模拟信号，A/D—D/A、带微处理器的混合。
（6）一台仪表一对线接到I/O，由控制站挂到局域网LAN。
（7）DCS是控制（工程师站）、操作（操作员站）、现场仪表（现场测控站）的3级结构。
（8）缺点是成本高，各公司产品不能互换，不能互操作，大DCS系统是各家不同的。
（9）用于大规模的连续过程控制，如石化等。
（10）制造商:Bailey（美）、Westinghous（美）、HITACH（日）、LEEDS & NORTHRMP（美）、SIEMENS（德）、Foxboro（美）、ABB （瑞士）、Hartmann & Braun（德）、Yokogawa（日）、Honewell（美国）、Taylor（美）等。
公司主营产品有:AB,ABB,GE,西门子,力士乐，施耐德,福克斯，等工业自动化控制配件及各种停产备件。诚信经营，质量可靠，请放心购买，我们将竭诚为您服务！
VACUUM FITTING STAINLESS STEEL FULL NIPPLE 2" LENGTH ISO LF 63 NW63 FLANGE
VACUUM FITTING STAINLESS STEEL ISO LF 63 NW63 FLANGE TEE 3-WAY 7" X 5"
VACUUM FITTING STAINLESS STEEL KF-40 NW40 FLANGE 24" LENGTH X 10" WIDTH
VACUUM FITTING STAINLESS STEEL KF-50 NW50 ADAPTER FITTING 90° 18" X 9"
VACUUM FITTING STAINLESS STEEL KF-50 NW50 KF-40 NW40 CONNECTIONS 1/4" VCR BLEED
VACUUM FITTING STAINLESS STEEL KF-50 NW50 TO KF-25 NW25 90 DEGREE CUSTOM FITTING
VACUUM FITTING STAINLESS STEEL NIPPLE ISO 100 NW-100 STRAIGHT
VACUUM FITTING STAINLESS STEEL NIPPLE KF-25 NW25 14.5" LENGTH STRAIGHT
VACUUM FITTING STAINLESS STEEL NIPPLE WITH KF-40 NW40 BLEED ISO 160 NW160
VACUUM FITTING STAINLESS STEEL REDUCER KF-50 NW50 TO ISO 160 NW160 STRAIGHT
VACUUM FITTING STAINLESS STEEL REDUCING CROSS KF-16 NW16 TO KF-25 NW25 2-3/4"
VACUUM FITTING STAINLESS STEEL REDUCING ELBOW 90° 90 DEGREES KF-50 NW50 KF-40 NW
VACUUM FITTING STAINLESS STEEL STRAIGHT NIPPLE ISO LF 63 NW63 7" LENGTH
VACUUM FITTING STAINLESS STEEL STRAIGHT NIPPLE KF-50 NW50 28" L W/ BELLOW END
VACUUM FITTING STAINLESS STEEL STRAIGHT NIPPLE KF-50 NW50 35" L W/ BELLOW END
VACUUM FITTING STAINLESS STEEL STRAIGHT REDUCER KF-40 NW40 TO KF-25 NW25
VACUUM FITTING STAINLESS STEEL VIEW PORT CONFLAT CF 1.33" 1-1/3: VIEWPORT
VACUUM FITTING STAINLESS STEEL VIEW PORT KF-40 NW40
VACUUM FITTING STAINLESS STEEL VIEW PORT KF-40 NW40 FLANGE
VACUUM FITTING STAINLESS STEEL VIEW PORT KF-40 NW40 VIEWPORT
VACUUM FITTING STAINLESS STEEL VIEW PORT VIEWPORT CONFLAT 6" CF FLANGED OPTICAL
VACUUM FITTING STAINLESS STEEL VIEWPORT WELD STUD 2-3/4" CONFLAT CF 1.12" TUBE
VACUUM FITTING STAINLESS STEEL WELD FLANGE WITH BORE 8-7/8" OD 7" ID
VACUUM FITTING ZERO LENGTH REDUCER STAINLESS STEEL FLANGE 8" TO 6"
VACUUM GENERAL MODEL 80-2 THROTTLE VALVE CONTROLLER
VACUUM GENERAL MODEL 80-6A BARATRON PRESSURE DISPLAY
VACUUM LINE FITTING STAINLESS STEEL KF-40 NW40 KF-25 NW25 FLANGES 24-1/2" X 12"
VACUUM PC BOARD PCB SENSOR BOARD WITH HONEYWELL 185PC05DT PRESSURE MOUNT
VACUUM SANITARY FITTING FLANGE W/ 3/4" AND VCR SST
VACUUM STAINLESS STEEL FEEDTHROUGH BASE PLATE KF-25 NW25 BLANK BLIND SCREW
VACUUM STAINLESS STEEL FITTING FLEXIBLE BELLOW KF-50 NW50 6" LENGTH
VACUUM STAINLESS STEEL SHOWER HEAD ISO 160 8 BOLT HOLES 10" DIA SST DIAMETER
VACUUM TECHNOLOGY PSOA ACCU-FLOW POSITIVE SHUT OFF LEAK VALVE KRYPTON GAS SST
VACUUM TUBE FITTING KF 50 NW 50 TO 1 3/4" NPT MALE
VALBIA PNEUMATIC ROTARY ACTUATOR SR 100 SET 05
VALBIA PNEUMATIC ROTARY ACTUATOR SR 100 SET 05
VAN AIR SYSTEMS 26-0652 SEAL KIT FOR 1-1/2" 1.5" DUAL PURGE EXHAUST VALVE
VAN AIR VALVE PLUG & SPRING KIT 26-1047 DEPRESS. VLV
VARIAN 03-641555-D PRINTED CIRCUIT BOARD
VARIAN 350D BERNAS SOURCE COMPRESSION COLLAR
VARIAN 884 VACUUM IONIZATION GAUGE 0884-K8844-302 115/230V 60HZ 200W
VARIAN 951-5017 STAINLESS STEEL 2 3/4" CF TEE TYPE MANUALLY OPERATED VALVE
VARIAN 990-MULTI 990 CLD MULTI-TEST POWER SUPPLY FOR HELIUM LEAK DETECTOR
VARIAN AGILENT TECHNOLOGIES CP7753 CP-WAX 52 CB 50 X0.32 (0.2) GC CAPILLARY
VARIAN AGILENT TURBO MOLECULAR TURBO-V 550 PUMP CONTROLLER
VARIAN CABLE ASSEMBLY BCA940903-02 HARNESS KIT
VARIAN L9104-301 CONVECTORR READOUT CONTROLLER
VARIAN RF-ETCH MONITOR PC BOARD 673526-01
VARIAN SD 700 0424.P1241.3 2 STAGE ROTARY VANE VACUUM PUMP W/ FRANKLIN MOTOR
VARIAN WAFER LIFT HD 6HARDC 300XP
VARIAN X1 104752 09 MASS SPECTROMETER ULTRAMASS ICP-MS QUAD ANALYZER PART
VARIOMAG ELECTRONIC STIRRERS CONTROLLER UNIT TELEMODULE 20 C
VARTECH VT7509 INDUSTRIAL DISPLAY MOUNTING ARM DESK EDGE CLAMP MOUNT
VAT 01032-UE44-0005 MINI UHV GATE VALVE CONFLAT CF 2-3/4" 2.75"
VAT 01032-UE44-0005/0114 MINI UH GATE VALVE CONFLAT 2-3/4" 2.75" CF FLANGE
VAT 01228-KA24-ACC1 MINI GATE VALVE VATLOCK
VAT 0750X-UA44-AKQ1/003 RECTANGULAR DOOR L-VAT TRANSFER DOOR VALVE
VAT 12146-PA24-0001/0094 VACUUM GATE VALVE 8 INCH WITH PNEUMATIC ACTUATOR
VAT 14044-PE24-ABG1 F14-112128/2 HV GATE VALVE
VAT 14046-UE24-0006/0006 HV STAINLESS STEEL GATE VALVE 8 INCH
VAT 14046-UE24-AAC1/0001 HV STAINLESS STEEL GATE VALVE 8 INCH
VAT 14050-PE24-AAC2/0003 GATE VALVE SERIES 140 HV GATE VALVE
VAT 16540-PH41-AAT2/0040 ISO 100 PENDULUM VALVE
VAT 20340-PA24-ACC2 VATTERFLY ISOLATION BUTTERFLY VACUUM VALVE PNEUMATIC
VAT 26424-KA01-0001 MANUAL ANGLE VALVE
VAT 26432-KA21-0001 HV ANGLE VALVE ISO KF/NW 40