GC8000 Process Gas Chromatograph

The GC8000 is a process analyzer that uses gas chromatography to measure the composition of multiple components in a stream. Engineered with reliable electronics and intelligently designed columns and valves, the GC8000 improves ease of maintenance while reducing operating costs. Its intuitive touchscreen HMI with system diagnostics reduces operation and maintenance headaches, maximizing measurement accuracy, reliability, and uptime.


Gas Chromatograph Modules (GCMs)

GCMs are virtual GCs within one analyzer, eliminating the need for multiple GCs. The GC8000 has a control module for each GCM, each with its own system clock. These modules then process information to a single HMI, where it is easily available.


Intuitive HMI

The menu system on the GC8000 is easy to navigate while offering all of the analysis and diagnostics tools needed. It has a built-in 12-inch color touch screen display that simplifies maintenance and operation, allowing technicians to easily access analytical parameters and measurement results such as trend displays of KPIs and gate and valve times. Chromatograms are also easily called up to compare analysis performance against stored chromatograms or a reference calibration chromatogram. The GC8000 also includes Yokogawa’s ASET (Analyzing Server Engineering Terminal) software, which allows technicians to access most of the HMI’s features remotely from a PC.



Reduced Maintenance

  • The software watches analyzer parameters and notifies the user if maintenance is required.
  • Reliable electronics reduce the need to replace the power supply or control cards while offering modularity to expand or exchange the analyzer’s I/O capabilities.
  • The Smart Oven design makes components easy to access and replace.
  • Gas injection valves are designed to perform around one million operations, extending time between replacements.
  • High sensitivity TCD (thermal conductivity) allows a TCD to measure in places that FIDs and FPDs would normally be used, reducing total analyzer and MRO costs.


Download and complete the Application Data Sheet to request a quote.

Measurable object Gas or volatile liquid (400°C or lower boiling point)
Analysis method Gas chromatography
Measurable range Depends on analysis conditions
TCD: 1ppm to 100%
FID: 0.1ppm to 100%
FID (with methanizer): 0.1ppm to 0.1%
FPD: 0.1ppm to 0.1%
Number of components to be measured Maximum of 999 (total number of components in all streams including calibration standard sample streams)
Analysis period Maximum of 21600.0 seconds (six hours)
Number of streams to be measured Maximum of 31 (including standard sample streams)
Material of sample-contact parts RV: 316SS, Hastelloy-C, Rulon, PTFE (Teflon, Bearee)
LSV: 316SS, Hastelloy-C, Rulon, Glass, PTFE (Teflon, Bearee), Fluororubber (Viton), perfloroelastomer (Kalrez)
Repeatability Depends on analysis conditions
Gas sample: ±1% of full scale for measuring ranges (2σ)
Liquid sample: ±2% of full scale for measuring ranges (2σ)

* The value may vary depending on the specifications and conditions. For details, contact Yokogawa.

Analyzer specifications

Type of protection Pressurized enclosure and flameproof enclosure
Area classification FM:
Type X Pressurization and Explosion proof for Class I, Division 1, Groups B, C and D. T1 to T4
Type X and Y Pressurization for Class I, Division 1, Groups B, C and D. T1 to T4
ATEX: II2G Ex d px IIB+H2 T1...T4 Gb
IECEx: Ex d px IIB+H2 T1...T4 Gb
TIIS: Ex pd IIB+H2 T1 to T4
Protection degree of enclosure NEMA3R, Equivalent to IP54 (dust and water resistant structure)
Operating ambient conditions -10 to 50°C, 95% RH or less (no condensation)
Weight   Wall-mounting version Self-standing version
Type 1 approx. 100 kg approx. 140 kg
Type 2 approx. 155 kg approx. 190 kg
Type 3 approx. 200 kg approx. 220 kg
Isothermal Oven
Volume Large isothermal oven: Approximately 45 L
Standard isothermal oven: Approximately 31 L
Setting temperature range 55 to 225°C 
(Temperature can be set in one-degree step.)
Temperature control accuracy ± 0.03°C
Temperature control PID control
Analog Input/Output Maximum of 16/Maximum of 32
Contact Input/Output Maximum of 32/Maximum of 20
PC communication Ethernet communication
Protocol: TCP/IP, FTP, Modbus TCP/IP
DCS communication RS-422
Protocol: MODBUS, Y-Protocol


Power supply 100/110/115/120/200/220/230/240 VAC ±10%, 50/60 Hz ±5%
Maximum rated power Type 1: 0.8 to 1.6 kVA
Type 2: 1.4 to 2.9 kVA
Type 3: 2.0 to 4.3 kVA
Instrument air Pressure: 350 to 900kPa (50.8 to 130.5 psi)
Type 1: 100 to 140 L/min
Type 1 with FPD: 130 to 200 L/min
Type 2: 150 to 210 L/min
Type 2 with FPD: 180 to 270 L/min
Type 3: 200 to 280 L/min
Carrier gas Types: H2, N2, He, or Ar
  Measuring range from 0 to 50 ppm or more: 99.99% minimum (water: 10 ppm or less, organic components: 5 ppm or less)
  Measuring range from 0 to less than 50 ppm: 99.999% minimum (water: 5 ppm or less, organic components: 0.1 ppm or less)
  H2: 500 kPa (72.5 psi) (Supplied with extra-regulator for explosion-proof certification)
  Other than H2: 400 to 700 kPa (58.0 to 101.5 psi)
Consumption: 60 to 300 mL/min per isothermal oven

The GC Module (GCM) is a concept where all the parameters and functions of a specific GC application are gathered under one section. For analyzers tackling more than one GC application, this allows everything to be segregated into individual virtual GCs for much easier understanding and maintenance. No longer will the technician need to wonder which valve or peak setting applies to which portion of the GC's application. And navigating between the GCMs is as simple as touching the GCM tabs on the screen.

One example of how the GCM design can help is with Parallel Chromatography. Parallel Chromatography is a powerful tool for process GCs that can often reduce analysis cycle times and hardware complexity. But until the GC8000, the implementation of parallel chromatography was cumbersome and difficult as the software for the different parallel chromatography segments were not segregated from one another. This complexity limited the ability of parallel chromatography to be utilized to its full potential. The GC8000 avoids this confusion and complexity by using individual SYS configurations (system clocks) for each individual mini-applications (often called applets).




Flexible and Secure Network Design

The communications network of the GC8000 is based on the industry standard Ethernet structure to provide flexible yet secure transmission of data to GC maintenance workstations and the plant DCS system. The GC8000 can be set up for either a single Ethernet network or a redundant network with two completely isolated Ethernet networks if desired. 

Built-in native Modbus TCP/IP protocol support for network communications eliminates the need for communication gateways to DCS in many situations. Not only does this simplify the network architecture, but it also removes a potential point of failure in delivering analytical data to the DCS. For communication systems that still require serial Modbus gateways, the GC8000's ASGW is available.

The GC network can even be expanded to include the Advanced Analytical Instrument Maintenance Software (AAIMS) that provides real-time asset maintenance management functions for a wide range of on-line process analyzers such as pH and O2 as well as GCs and FT-NIRs. AAIMS improves the process analysis efficiency by accurately assessing and displaying the KPIs of each analyzer through real-time data acquisition combined with statistical quality control (SQC) analysis. It also provides a common graphical interface for all the plant's analyzers for validation checks and alarm reporting.

Applications in Industries

Petrochemicals ethylene, polypropylene, polyethylene, BTX, butadiene, vinyl chloride, styrene, alcohol, aldehyde, ester, and vinyl acetate
Petroleum refining distillation point analysis, PINA/PIONA analysis, FCC, sulfur recovery
Chemistry chlorides, fluorine compounds, formalin, methanol, urea, ammonia, phenol
Electric power/gas fuel gas, exhaust gases, coal gasification/ liquefaction, fuel cell
Iron and steel blast furnace, coke oven
Air plant organic/inorganic gas analyses
Chemicals chemicals, agricultural chemicals
Environmental monitoring  air/soil pollution monitoring, plant/work environmental analyses, analyses (VOC)


  • Fast online gas chromatograph (GC) analysis for LPG distillation.
  • The analytical upgrade project with Yokogawa's process GCs was complete success.
Yokogawa Technical Report

In recent years, shale gas extraction technology has made rapid progress, inducing a shale gas revolution mainly in the USA. Thus, the need for analysis of hydrocarbon gases, including natural gas, is expected to grow rapidly. Traditionally gas chromatography has been used for the analysis of hydrocarbon gases; it can accurately measure the concentration of each hydrocarbon component in a sample of natural gas.


Control Engineering Asia, May 2012

An exception level of engineering expertise tailored for the local market is one of the primary reasons why Yokogawa has managed to capture and keep the process automation top spot in the Land of Smiles, says Somkid Teraboonchaikul, managing director, Yokogawa Thailand.

Media Publication

Marcus Trygstad, Yokogawa Corporation of America, outlines the advantages of EUVF technology for total reduced sulfur measurement in flare gas.


Loek van Eijck, Yokogawa, The Netherlands, questions whether rapid analysis of gases and liquids can be better achieved through use of a gas chromatograph or near infrared analyser. Conventionally, the liquid and gas components such as those broken down by naphtha crackers have been measured by a process gas chromatograph (PGC), with the subsequent measurement values then being used for control purposes.

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