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Item # Model 425N4N7, Model 425N4N7 Binary Gas by Thermal Conductivity Analyzer, ex-proof sensor housing with NEMA4 wall-mount control cabinet (two separate enclosures)


The Nova FLEXI-NOVA Series Platform has been designed for continous gas measurments 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.

Depending on application, some light-duty sample conditioning features may be available. For clean process measurements, of certain binary gas mixtures such as H2 or He in Air. This analyzer utilizes a temperature-controlled, thermalconductivity (TC) cell for the required measurement. The cell produces a small millivoltage output which is directly proportional to the gas detected. The analyzer can be supplied with a pump or pressure regulator depending on customer requirement.

All sensors / detectors are temperature-controlled or temperature-compensated for maximum analytical stability. Easy calibration using touch-screen controls. Serial Output Package allows USB connection & data-logging to personal computers.


Cabinets: Wall Mounted Class1 Div1 GrpBCD NEMA7 UL/CSA Explosion-proof sensor cabinet with NEMA4 wall-mount control cabinet (two separate cabinets)




Specifications  · Applications  · Features  · Options  · Calibration  · Unique Applications

Specifications

Method of Detection
Temperature-controlled TC cell.

Ranges Available
0-2.0% to 0-100.0% and truncated ranges such as 85.0-100.0% Consult Nova regarding feasibility of measuring your specific gas mixture.

Accuracy & Repeatability
±1% of full scale

Drift
Less than 1% of full scale per month

Response Time (T-90)
10-15 seconds to 90% step change

Ambient Temperature Range
32 to 122°F (0 to 50°C), Lower temperatures (-5°F, -20°C) with Cold Weather Package

Linearity
±1% of full scale

Size & Weight
Dimensions will vary depending on enclosure style and options required

Power
115 VAC, 60 Hz
220 VAC, 50 Hz

Output Options
4-20 mA into 500 ohms non-isolated standard
Isolated 4-20 mA, RS232, RS485, MODBUS, Ethernet outputs

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

Analyzer Type
Binary Gas Analyzer

Hazardous Area Rating Options
General Purpose, Non-Hazardous


Applications
      For continuous analysis of many binary gas mixtures comprised of H
2
      , CO
2
      , O
2
      , CH
4
      , SO
2
      , Ar, He, NH
3
      , SF
6
      , air, and others. Applications include heat treating atmospheres, welding gas mixtures, blanketing gas mixtures, ammonia synthesis, leak detection, purge monitoring, flue gas, magnesium blanketing by SF
6
    and others.


Features
  • Bright digital readout
  • Lower cost than infrared, GC or mass spectrometer
  • High stability, microprocessor-controlled, long-life thermal conductivity (TC) cell
  • Easy-to-maintain modular layout
  • Built in sample pump or pressure regulator
  • 4-20 mA outputs
  • Sensors mounted in temperature controlled heated box to improve accuracy


Options
  • Hi/Low gas, low flow, and diagnostic alarms available
  • Isolated analog, RS232, RS485, MODBUS, and Ethernet outputs available
  • Sample conditioning systems available for removal of moisture, acidic gas, and dust
  • Cabinet purge system available for use in hazardous areas
  • One-step 'cal-now' button calibration with touch screen LCD display
  • Full automatic calibration with touch screen LCD display
  • Cold weather package for operation to -5°F (-20°C)
  • Cabinet coolers can be fitted to most models


Calibration
  • Air or nitrogen for zero
  • Analyzed calibration gas for span


Unique Applications
    All Nova analyzers are built using proven technologies and techniques. If this product does not suit your application, please contact Nova. In many cases, we are able to build an analyzer specific to your needs.


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