Multi Gas Analyzer Models FAQ’s

Do you have an installed base?
Yes, we have been manufacturing continuous and portable oxygen gas analyzers for many years now, and have a large installed base that includes manufacturing facilities, heat treat companies, laboratories, universities, research companies, alternative energy companies, and many others.

What is your average delivery time?
Because there are several Nova product lines that feature hydrogen analysis with many options and variations, we build each analyzer specifically for each customer. Within usually just a couple of months or less, the customer can be up and running with their new analyzer.

What gases can you measure and what ranges do you offer?
  • Oxygen – standard range 0-25.0% O2
  • Carbon Monoxide – any range between 0-1.0% to 0-30.0% CO
  • Carbon Dioxide – any range between 0-1.0% to 0-30.0% CO2
  • Methane – any range between 0-1.0% to 0-30.0% CH4
  • Hydrogen – any range between 0-1.0% to 0-50.0% H2
  • Other ranges may be available – please inquire
  • Available ranges depend on application and analyzer specified
How do you handle corrosive or acidic flue gases?
For continuous analyzers, it is best to remove corrosive gases from the sample stream before entering the analyzer, or prevent their accumulation at the sensors and detectors. Water wash sample conditioning systems are available to dissolve and remove many acidic components from the sample gas. We can also supply upgraded systems designed to withstand corrosive sample gases. For portable analyzers, some options may be available to allow limited analysis of challenging sample gases – please inquire.

How do you handle particulate and moisture?
For continuous analyzers, pre-filters and heavy duty heated filters are available to efficiently remove particulate matter without compromising sample flow or inducing condensate formation. Continuous automatic moisture removal systems are available for moist samples. For portable analyzers, in-line filters provide limited particulate removal. Condensate removal filters and portable pre-coolers are also available for use with portable analyzers.

What if I have a hazardous-rated area?
For continuous analyzers, hazardous area purge kits are available. Nova will install these directly on the analyzer cabinet. The customer does not have to do anything extra except provide instrument air to the analyzer. Some of Nova’s continuous single gas analyzers are also available in explosion-proof cabinets for use in Class 1 Division 1 hazardous rated areas. See this page for more info. Nova’s portable analyzers are suitable for General Purpose Area us only.

How far away from the extraction point can the analyzer be located?
Typical distance between analyzer and extraction point is usually between 5-50 ft and the customer may use any type of sample line that they wish unless otherwise advised by Nova.

How fast is your analyzer, what is the response time?
Sampling time is a function of how far away the sample point is to the analyzer, and the speed of the detectors and sensors. Nova uses a reliable high volume pump to quickly pull the sample into the analyzer. Most of our multi gas analyzers will be 20-30 seconds to 90% step change.

Can your analyzer go outdoors? In hot or cold weather?
Many multi-gas applications are located indoors. However, Nova continuous analyzers are built into sturdy weather-proof enclosures. They are available with various indoor or outdoor packages that allow analyzer operation in temperatures as low as -22°F (-30°C). Cabinet coolers are also available for operation in temperatures above 120°F (50°C). Most of Nova’s portable analyzers are suitable for use in 32° to 105°F (0° to 40°C).

How and when do I need to calibrate the analyzer? What cal-gases do I need?
Every Nova analyzer comes fully factory-calibrated. Manual calibration procedure on portable and continuous analyzers is simple and is described in detail in the owner’s manual. For continuous analyzers, automatic calibration is optionally available. This configuration does not require any user intervention or involvement to perform calibration. Usually, only one or two cylinders of calibration gas is/are required. Recommended calibration frequency is approximately every three-six months depending on the stringency of the application.

What data communication options do you offer?
For most portable and continuous analyzers, non-isolated 4-20mA recorder outputs are either included or optionally available. Isolated recorder outputs are available on continuous analyzers. Some portable and most continuous analyzers can be supplied with optional Serial Output Package which allows gas readings to be sent to a personal computer via a choice of USB, RS-232, or RS-485 connection. Optional alarms with LED lights and audible alarms available on portable analyzers. Alarms for continuous analyzers have an LED on the front panel and relay contacts for controlling remedial equipment/processes.

Take a look at some of our Multi Gas Analyzers.

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