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The Nova FLEXI-NOVA Series Platform has been designed for continuous gas measurements in applications and environments that are less intensive. Lab work, research, clean processes, pre-treated / pre-cleaned produced gases, and others, may benefit from the FLEXI-NOVA series.

The limited size and function of the ex-proof cabinet design means that no sample conditioning features are available. Therefore, the FlexiNova ex-proof series is only suitable for clean process gas measurements. The model 415N7MC measures PPM-level O2 gas. This electrochemical type sensor is unaffected by most other gases in the sample including most hydrocarbons and acidic gases such as carbon dioxide (CO2), hydrogen sulfide (H2S), and sulfur dioxide (SO2). Typical O2 sensor life is 1-2 years or longer depending on measurement concentrations and sample gas exposure. The sensor may be easily replaced by the customer.

All sensors / detectors are temperature-controlled or temperature-compensated for maximum analytical stability. Easy calibration using magnetic switches or touch-screen controls (depending on cabinet configuration).

Cabinet: Wall Mounted NEMA7 UL/CSA Explosion-proof with Non-intrusive Magnetic Calibration, Class 1 Div 1 Group BCD.
Availability depends on application and environment. Sample conditioning options not available with this cabinet style.
Unit of Measure


Method of Detection

N/A Customer replaceable 'fuel cell' oxygen sensor

Ranges Available

N/A Any range between 0-100 PPM and 0-10000 PPM

Accuracy & Repeatability

N/A ±1% of full scale


N/A Less than 1% of full scale per week

Ambient Temperature Range

N/A 40 to 104°F (4 to 40°C)


N/A ±1% of full scale (minimum 0.5 PPM)

Size & Weight

N/A EX-PROOF: 61H x 33W x 31H cm (24"H x 13"W x 12"D)

Output Options

N/A 4-20mA into 500 ohms non-isolated standard Isolated 4-20mA, RS485


N/A High and/or Low alarm contacts available, relay contacts SPDT 5A @ 220 VAC rating Low flow alarm

Analyzer Type

N/A O2 Analyzer

Hazardous Area Rating Options

N/A Class 1, Div 1, Grp A-D Hazardous Area Rating


N/A Light-duty analyzers for applications or environments that are less intensive. For continuous analysis of PPM levels of oxygen (O2) in clean / dry gas streams. Applications include blanketing mixtures, glove boxes, electronics, research, hydrogen/nitrogen mixtures, and many others.



  • Bright digital readout in PPM O2
  • Ranges available from 0-100 PPM to 0-10000 PPM O2
  • Unaffected by hydrocarbons in the sample
  • Easy-to-maintain, modular layout
  • Built in sample pump or pressure regulator, and 4-20mA outputs
  • Manual or solenoid valves trap nitrogen (N2) in cell to avoid depletion when analyzer is powered off
  • Touch-screen display for gas readings and for start-up programming at installation time
  • Magnetic switches allow subsequent calibration and operation control (on standalone N7MC version)



  • Hi/Low gas and low flow alarms available
  • Serial output available



  • Nitrogen for zero
  • Air or analyzed calibration gas for span

Unique Applications

N/A The O2 sensor in the Model 415 is not normally affected by gas stream composition. However, continuous or frequent exposure to high levels of acid gases such as carbon dioxide (CO2) and sulfur dioxide (SO2) can cause decreased cell life. All Nova analyzers are built using proven technologies and techniques. If this product does not suit your application, please contact Nova at 1-800-295-3771. In many cases, we are able to build an analyzer specific to your needs.

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