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Process Gas Chromatograph (Ei800 Series)

Analyzer for a variety of gases

Available for Download

The Ei800 Series Process GC provides fast and accurate online monitoring of various process gases, delivering calculated values pertaining to the gas composition as well as their concentrations. The TCD technological breakthrough provides incredibly fast and sensitive analysis, and the modular design allows for custom GC columns that are suitable for a wide range of applications. Despite its small size, it is incredibly powerful and can be programmed for manual gas analysis as well as continuous process monitoring.

Product Details

Process Gas Chromatograph (Ei800 Series) Features

  • Compact EX Certified Process GC
  • Super fast analysis: 30 seconds for complete gas composition analysis
  • Up to 4 Columns
    • Customizable to application
  • Extreme Sensitivity and Accuracy
    • 500 ppb DL
  • Multi-Stream Capacity of a 4 or 8-stream solution
    • Analyses complete within the 15-minute EPA RFS mandate
  • Minimal carrier gas consumption of 5 mL/min. during analysis
  • Low Power Requirements
    • 10W power consumption
    • No AC required (24 VDC)
  • Extremely Compact Design
    • 11.4 x 10.2 x 4.8”
    • Weighs less than 30 lbs
  • Easy to Maintain
    • Has a robust design without any tubes or capillaries
    • Replaceable cartridges
  • EPA Renewable Fuel Standard (RFS) compliant


  • Explosionproof Enclosure
  • Multi-Sampling Point Switching System
  • Inert Coating for High H2S Applications
  • Vacuum Eductor System for Low-Pressure Applications


General Purpose Wall Mount, Explosionproof Wall Mount

Process Gas Chromatograph (Ei800 Series) Technical Specifications

Specifications Values
Cycle Time 15 to 60 s (typical)
Repeatability of Concentration < 0.05% RSD (typical, concentration dependent)
Calorific Value Calculation for Natural Gas ISO 6976:2016, GPA 2172, ASTM D3588: ± 0.025% repeatability
Operating Temperature –20 to 55 °C /–4 to 131 °F
Storage Temperature –20 to 60 °C /–4 to 140 °F
Moisture 5 to 95%
Dust/Water Protection IP65 (only valid with receptacle cap /mating connections)
Power Supply 20 to 28 VDC
Power Consumption 20 W nominal, 75 W max
Dimensions 289 ×258 ×122 mm /11.4 ×10.2 ×4.8"
Weight < 15 kg /33 lb. (without mounting brackets)
Gas Ports 1 /16" VICI Valco
Carrier Gas He, Ar, N₂, or H₂
Carrier Gas Input Pressure 65 ± 5% psi
Carrier Gas Consumption 15 ml /minute typical
Sampling Pressurized or atmospheric (integrated pump)
Sample Pressure 1 to 30 psi (but < column head pressure)
Sample Streams 4 (option for more)
Detectors Fore-flush and back-flush micro TCD
Detection Limit 500 ppb to 100% (application dependent)
Communication Ports 2 × MODBUS over RS485
1 × MODBUS over RS232
1 × MODBUS over TCP /LAN
2x Digital I /O
Memory Storage Up to 256 GB
Certifications ATEX/IECEx II 2G Ex db IIB+H2 T4 Gb;
NEC&CEC Class I, Div. 1, Groups B,C and D, T4 (pending)

Typical Applications for Process Gas Chromatograph (Ei800 Series)

  • Biogas (Raw and Process)
  • Renewable Natural Gas (RNG)
  • Natural Gas
  • Synfuels
  • Landfills
  • Wastewater Treatment Plants
  • Dairy, Hog and Chicken Farms
  • Natural Gas Pipeline Monitoring
  • Process Monitoring
  • Others

Available Measurements for Process Gas Chromatograph (Ei800 Series)

  • Major Gases (CH4, C2, C3+, CO2, CO, O2, H2, N2, He, H2S, COS)
  • Heating Value and Relative Density
  • Custody Transfer (C6+, C9+)
  • Total and Speciated Sulfur
  • Moisture (H2O)
  • BTEX
  • Others Available

Related Products

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