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Item # Model 425N4, Model 425N4 Binary Gas by Thermal Conductivity Analyzer, Wall Mounted NEMA4 (IP65) Enclosure Rating


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.

Standard Cabinet: NEMA 4 Weather-proof steel cabinet with window.
Optional: 19" rack mount cabinet also available in some applications.




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
Usually ±1% of full scale, depending on gas mixture & application

Drift
Usually less than 1% of full scale per month, depending on gas mixture & application

Response Time (T-90)
Usually 10-15 seconds to 90% step change, depending on gas mixture & application

Ambient Temperature Range
40 to 104°F (4 to 40°C). Optional: up to 130°F (55°C) with cabinet cooler.

Linearity
Usually ±1% of full scale, depending on gas mixture & application

Size & Weight
NEMA 4: 51H x 41W x 26D cm (20"H x 16"W x 10"D)
RACK MOUNT: 22H x 48W x 47D cm (8.7"H x 19"W x 16"D)

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, USB serial 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
Light-duty analyzers for applications or environments that are less intensive. For continuous analysis of a choice of many binary gas mixtures comprised of H2, CO2, O2, CH4, SO2, Ar, He, NH3, SF6, Air, and others. Applications include heat treating atmospheres, welding gas mixtures, blanketing gas mixtures, ammonia synthesis, gas purge monitoring, magnesium blanketing by SF6, 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
  • 4-20mA recorder output
  • Sensors temperature-controlled for maximum stability


Options
  • Hi/Low gas and low flow alarms available
  • Serial output & data-logger package available
  • Light-duty pre-filter & condensate removal
  • Rack mount cabinet available, depending on application
  • Cabinet cooling available for NEMA4 cabinet


Calibration
  • In most cases, on bottled gas for Span and Zero


Unique Applications
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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·  Application process


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425 FlexiNova Process TC Analyzer21
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