700 Series HFID Heated Hydrocarbon Analyzer

California Analytical Instruments introduces their latest 700 HFID analyzer...


  • Measures From Low 30 ppm up to 3% Full Scale as Methane

  • Auto Calibration and Ranging

  • Fast Response Time

  • Electronic Flow Control

  • Temperature Stabilized Detector

  • Automatic Fuel/Air Shut-off

  • Comprehensive Diagnostics

  • Output Options: Voltage, Current, RS-232, TCP/IP, MODBUS

  • CE Mark and ETL Listed—Conforms to UL STD 61010-1, Certified to CAN/CSA C22.2 STD No. 610610.1

  • Meets 1065 Requirements


  • Stack Gases (CEM)
  • Combustion Efficiency
  • Turbine/Generator Feedback Control
  • Process Chemical Gas Analysis
  • Personnel Safety
  • Vehicle Emissions
  • Fuel Cell Analysis


  • Internal Sample Pump
  • Internal Zero and Span Solenoid Valves
  • 19 Inch Rack Mount Slides
  • Methane/Non Methane Version


The California Analytical 700 Series HFID Analyzer is designed to continuously measure the total concentration of hydrocarbons within a gaseous sample. The analyzer exhibits superior sensitivity and response time.

The 700 Series Hydrocarbon Analyzer utilizes the principle of Flame Ionization Detection (FID) to determine the total hydrocarbons within a gaseous sample. The HFID analyzer has a heated oven (191 deg C) which contains a burner and an optional heated pump. The small flame of the burner is elevated and sustained by the regulated flows of air and either pure hydrogen or a 40/60 mixture of hydrogen and (helium or nitrogen). The split ring detector contains 2 electrodes. One electrode is negatively polarized using a precision power supply and the other electrode, known as the “collector” is connected to a high impedance, low noise electronic amplifier. The two electrodes establish an electrostatic field. When a gaseous sample is introduced to the burner, it is ionized in the flame and the electrostatic field causes the charged particles (ions) to migrate to their respective electrodes. The migration creates a small current between the electrodes. This current is measured by the precision electrometer amplifi-er and is directly proportional to the hydrocarbon concentration of the sample.

Methane/Non-Methane Hydrocarbon Option

The Methane Only feature provides for measuring METHANE ONLY or TOTAL HYDROCARBONS and calculates, displays and outputs the sample’s NMHC content. The Non-Methane Cutter’s catalyst efficiency is greater than 98% for Ethane and heavier hydrocarbons with less than 10% loss of Methane.


Detector: Flame Ionization Detection
THC Ranges: Four User-definable from 0-3 to 30,000 ppm as Methane (Contact Keika for Ranges Lower than 30ppm)
Optional Paramagnetic Oxygen: 0-25%
Response Time: 90% Full Scale in 1.5 Seconds.
Repeatability: Better than 0.5% of Full Scale
Linearity: Better than 1% of Full Scale
Noise: Less than 1% of Full Scale
Zero & Span Drift: Less than 1% of Full Scale per 24 Hours
O2 Effect: Less than 3% with H2 / He Fuel
CH4 Effect: Less than 1.15 Propane
Flow Control: Electronic Proportional Pressure Controller
Sample Flow Rate : Typically 2.0 LPM (Consult Keika for other flow rates)
Converter: Carbon Material @ 205 C; 95 to 100% Efficiency
Fuel Requirements: 40% H2 60% He (120cc/min) or 100% H2 (60cc/min) (needs to be specified at time of order)
Fuel Inlet Pressure: 25 psig
Air Requirements: Less than 1ppm Carbon purified or Synthetic air (220cc/min for H2/He; 300 cc/min for H2)
Air Inlet Pressure: 25 psig
Fuel & Air Control: Electronic Proportional Pressure Controller
Readout: As ppm CH4 or C3H8
Analog Ouputs: Voltage or Current
Communications: RS232, TCP/IP and Modbus
Discrete Alarms: General Fault/ TTL Logic (Ground True)
Calibration Failure/ TTL Logic (Ground True)
High Concentration (2 each)/ TTL Logic (Ground True)
Diagnostics: Oven Temperature, Burner Temperature, Sample/Fuel/Air Pressures, Flow Rates and EPC Control Voltages
Keypad Displays: Factory Settings, TCP/IP Address, Passwords (4), Scalable Analog Output Voltages, Full Scale Range Select, Auto Cal Times
Special Features: Auto Ranging, Auto Calibration (adjustable through internal clock)
Ignition: Local, Remote or Automatic
Display: 3” x 5” Back lit LCD
Sample Temperature: Up to 191°C, Non-condensing (HFID) 50°C, Non-condensing (FID)
Oven Temperature: 200°C HFID
Ambient Temperature: 5 to 40°C
Ambient Humidity: Less than 90% RH (Non-condensing)
Warm-Up Time: 1 Hour (Typical)
Fittings: 1/4 Inch Tube
Power Requirements: 115/230 (±10%) VAC; 50/60 Hz, 750 Watts max.
Dimensions: 5¼ H x 19 W x 23 D (Inches)
Weight: 50 lbs.


700 Series HFID Heated Hydrocarbon Analyzer
Item # CAI 700 HFID 

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