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The Nova Model 7200 Series of flue gas analyzers are specifically designed for use on flue gases from combustion processes burning gaseous fuels.  The 7200 series analyzers can measure sample gases for oil or coal fired processes with the addition of a Model 7240 heated sample filter.  The 7200 can also measure flue gases in the presence of acidic or corrosive samples through the use of sample pre-conditioners.

Sample gas is drawn into the analyzer from the sampling probe heated filter or sample pre-conditioner, then pumped through a condensate removal system. Any condensate formed is collected then automatically purged.  Next, the dried sample gas is filtered again, then flows through a pressure regulator, PTFE liquid blocker, calibration gas valves, low flow switch, flow meter then on to the gas detectors.  An optional vacuum switch at the pump inlet warns if the pre-filter is becoming plugged up.

The 7200 Series analyzers are available in any combination of O2, CO, CO2, NOx (as NO or NO + NO2), SO2, or combustibles, with separate digital readouts and outputs for each.  Special sampling probes are available for high temperature applications up to 3200°F (1760°C).  The 7200 Series is multi-sample point capable (consult Nova).
Unit of Measure


N/A % O2 by zirconia sensor when applicable % O2, 10-1000 PPM NO, NO2 CO and SO2 by electrochemical sensor CO2 >1000 PPM, % CO and SO2 by infrared detector Combustibles by catalytic combustibles detector with air 'make-up' system High accuracy % O2 by paramagnetic sensor


N/A 0-100 PPM to 0-5% SO2 0-100 to 0-100% CO 0-100 to 0-5000 PPM NO 0-100 to 0-800 PPM NO2 0-2, 0-5, 0-10% Combustibles 0-20% CO2 0-5 to 0-25% O2


N/A 0.1% on %, 1 PPM on PPM


N/A ±1-2% of full scale - depending on gas measured and range


N/A Less than 2% of full scale per month


N/A 20-30 seconds to 90% of step change


N/A 32 to 122°F (0 to 50°C) @ 5-95% RH non-condensing. Lower temperatures (-5°F, -20°C) with Cold Weather Package. ºC


N/A ±1% of full scale


N/A Dimensions and weight will vary with configurations selected


N/A 115 VAC, 60 Hz 220 VAC, 50 Hz


N/A OP1 - 4-20 mA non-isolated OP2 - 4-20 mA isolated OP3 - 0-5 V OP4 - 0-10 V OP5 - RS-485 OP6 - Modbus


N/A High or low alarm contacts available for all gases and low flow


    All Nova analyzers are built using proven technologies and techniques.


N/A Oxygen (O2)


N/A O2 by electrochemical sensor


N/A Std SS probe with unheated pre-filter (Std. probe 3/8" O.D. x 18") (9.5 x 460 mm)


N/A 1 Sample point (no sequencing)


N/A D1 - LED display (s) - Manual potentiometer calibration D2 - LED display (s) - Manual push-button calibration D3 - Microprocessor controller with single graphic display. Allows auto sequencing, RS-485 output, 'CAL NOW' and one-step D4 - Same as D3 but with full auto-calibration


N/A Flue Gas or Emissions


    Continuous analysis of flue gas for any combination and range of O2, CO, CO2, SO2, NOx (NO or NO + NO2) or combustibles from combustion processes.


  • Best value continuous flue gas analyzer
  • Sensitive infrared detectors for % and > 1000 PPM CO, CO2 or SO2
  • Long life electrochemical sensor for 10-1000 PPM CO, NO, NO2, and SO2
  • Catalytic sensor for % combustibles
  • Fast response time and bright digital readout for each gas
  • Microprocessor based with push button or potentiometer calibration
  • Easy to maintain modular layout
  • Sample preparation includes filteration and continuous moisture removal
  • 4-20mA outputs for each gas measured
  • Sensors are temperature controlled for maximum stability


  • Hi/Low gas, low flow, high vacuum and diagnostic alarms available
  • Isolated analog, RS232, MODBUS® and Ethernet outputs available
  • Cabinet purge system available for use in hazardous or high dust areas
  • One-step 'cal now' button or full auto-calibration with touch screen LCD display
  • Cold weather package for operation to -5°F (-20°C)
  • Cabinet coolers can be fitted to most models
  • Stack-mounted heated filters and high temperature probes
  • Stack temperature readout

    Optional sample conditioning includes:

    1. Continuous water pre-wash system for acidic fuel gases that are present but not to be analyzed (See Model 7300)
    2. Nafion-Tube™ based sample dryer for high accuracy analysis of acidic samples, where NO2 or SO2 are to be measured
    3. Heated stack filter for removal of dust from high particulate samples (Model 7240), automatic blowback available
    4. Calibration gas injected at heated stack filter
    5. Multiple sample point sequencer which allows multiple samples to be selected and analyzed (See Model 402AS)

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