Model GFC-7002T

Infrared Analyzer



The GFC Series gas filter correlation analyzers measure low ranges of gases (CO, CO2 and N2O detecting models available by comparing infrared energy absorbed by a sample to that absorbed by a reference according to Beer-Lambert Law. All GFC Series instruments offer an advanced color display, capacitive touch screen, intuitive user interface, flexible I/O and built-in data acquisition capability. All instrument set up, control and access to stored data and diagnostic information is available through the front panel or via RS-232, Ethernet or USBcom ports either locally or by remote connection using the included APIcom™ software.​

Gas Filter Correlation Wheel

By using a gas filter correlation wheel, a high energy IR light source is alternately passed through a target gas filled chamber and a chamber with no target gas present. The light path then travels through the sample cell, with a variable length folded path depending on the gas being detected. The energy lost through the sample cell is compared with the reference signal provided by the filter wheel to produce a signal proportional to concentration, with little effect from interfering gases within the sample. This design produces excellent zero and span stability and high signal to noise ratio, allowing excellent performance over a wide concentration range.​



  • ​Rack mount bracket switch chassis slides
  • Rack mount brackets only
  • Handles​


  • Ambient zero/ambient span
  • Ambient zero/pressurized span
  • Zero scrubber/pressurized span
  • Zero scrubber/ambient span


  • ​Paramagnetic O2 sensor
  • CO2 sensor
  • Concentration alarm relays
  • Expendables kit​​


  • Gas Filter Correlation (GFC) NDIR analysis technique using a white cell folded sample path with specially designed optical mirrors providing a 14 meter path length

  • Excellent leak-free integrity on the gas filter wheel with a 5 year Warranty

  • Ranges from 0-2 ppm to 0-2000 ppm CO2, fixed or auto-ranging (optional lower ranges)

  • Particulate filter

  • Stainless steel pressure transducer (suitable for O2 clean service)

  • Operating temperature of electronics: 5 to 40°C

  • Large, luminescent touch-screen display with easy-to-view characters

  • Menu-driven functionality and numerous parameters detected with microprocessor-based functionality

  • Provided with ears for easy mounting

  • Front-panel accessible USB ports for firmware upgrades as standard

  • One 4-20mA (isolated) analog output included

  • Up to 4 analog outputs, 4-20 mA or settable voltage type (0-100 mV, 0-1V, 0-5V, 0-10V)

  • Ethernet and 2 x RS-232 digital outputs (optional USB, RS-485 or multidrop RS-232 available)

  • 8 x opto-isolated digital outputs and 6 x opto-isolated digital inputs

  • Power: 110 VAC or 220 VAC, 50/60 Hz (user to specify)​


Gas Analyzed



​0-1 ppm to 0-1,000 ppm full scale
(0-200 ppb to 0-200 ppm full scale for -U version)
(dual ranges and auto-ranging supported)

​Analog Output

​10V, 5V, 1V, 0.1V (selectable


​Zero:        <0.02 ppm (RMS)
                  (< 10 ppb (RMS) with -U option)
Span:        <0.5% of reading (RMS) above 5 ppm
                  (< 0.5% of reading (RMS) with -U option)


​Zero:        0.1 ppm/24 hours
                 (< 25 ppb/24 hours with -U option)
Span:        < 0.5% of reading/24 hours


​Lag:           10 seconds
Rise/Fall:   < 60 seconds to 95%


​1% of full scale


​0.5% of reading

​Flow Rate

800 cm3/min ± 10 min


​100V-120V or 220V-240V, 50/60 Hz


​± 10%


​41° to 104°F (5° to 40°C)


​7"H x 17"W x 23.5"D
(17.8 x 43.2 x 59.7 cm)
40 lbs (18 kg)


​Included:    1 x Ethernet: 10/100 Base-T
                     2 x RS-232 (300-115, 200 baud)
                     2 x USB ports for firmware upgrades
                     8 x opto-isolated digital outputs
                     6 x opto-isolated digital inputs
                     4 x analog outputs (3 x 4-20 mA current outputs)
Optional:    1 x USB communication port
                     1 x RS-485
                     8 x analog inputs (0-10V, 12 bit)
                     4 x digital alarm outputs
                     Multidrop RS-232