Gas Analyzer Model: 7000

Primary Applications: Measurement of Binary Gas Mixtures Used in Welding Shield Gas, Food Packaging, Leak Detection, Heat Treating Atmospheres

  • Built-in flow controls
  • Rugged Thermco TC detector cell
  • A variety of alarm contacts and signal outputs
  • Panel mount style
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Specifications

Model 7000
Common Ranges
Range Mixture Example Application
0-50% CO2 in Ar 25% CO2 in Ar GMAW shield gas
0-10% O2 in Ar 5% O2 in Ar GMAW shield gas
0-50% He in Ar 25% He in Ar GMAW shield gas
0-100% He in Ar 75% He in Ar GMAW shield gas
0-50% H2 in Ar 35% H2 in Ar GTAW shield gas
0-50% CO2 in N2 30% CO2 in N2 food packaging
0-100% O2 in CO2 80% O2 in CO2 food packaging
0-20% H2 in N2 10% H2 in N2 furance atmosphere
0-100% H2 in N2 75% H2 in N2 furance atmosphere
0-50% N2 in Ar 20% N2 in Ar lamp filling
0-50% He in N2 25% He in N2 leak detection

Range: Many ranges are available. Some common ranges are shown above. Consult Thermco Sales Engineer for details.

Accuracy
  • ±0.3% of minor component absolute over range of 0-10%, all ranges.
  • ±0.5% of minor component absolute over a range of 10.1% to 30.0% all ranges.
  • ±1.0% of minor component absolute over a range of 30.1% to 60.0% all ranges.
  • ±2.0% of minor component absolute over a range of 60.1% to 100.0% all ranges except CO2 in Ar, which has an accuracy of ±8.0%
  • Example: For a 25% CO2 in Ar mixture, the analysis will be between 24.5% and 25.5%
  • This accuracy is valid over a temperature range of 50° to 90°F (10° to 32°C).
Resolution 0.1%
Response Time 95% in 45 seconds for typical gas mixtures
Maximum Drift Zero, ±2% of full range per week; span, ±1% of full range per month. This applies to typical ranges.
Frequency of Calibration Calibration is recommended once per year when used under typical conditions.
Ambient Temperature Limits -10°F to 110°F (-23°C to 43°C)
Utilities Required
  • Reference gas: The background gas in the mixture is required to flow continuously at 0.5 SCFH. This should be a clean, dry, oil free gas. Gas pressure required is 1-150 PSIG
  • Sample gas: The sample gas is required to flow continuously at 1.0 SCFH. This should be a clean, dry, oil free gas. Gas pressure required is 1-150 PSIG, except gases containing H2 are 1-50 PSIG.
  • Power: 104-126 VAC, 50/60 Hz. 1 ampere standard; 204-240 VAC, 50/60 Hz. optional
Output Signal 4-20 mA, proportional to gas analysis range selected. This output is isolated and self-powered with a compliance of 10 VDC.
Alarms Relays Two independent alarm relays, form C, with a rating of 5 amperes at 120/240 VAC (resistive). Note; when the alarm package is specified these alarm relays are utilized in the alarm package circuitry.
Enclosure General purpose indoor panel mount
Weight 44 lbs. (20 kg)
Dimensions 15.5 in (39.4 cm) height, 13.6 in (34.5 cm) width, 10.3 in (26.2 cm) depth

Additional Information

Documentation

Each gas analyzer is supplied with one instruction manual which includes wiring and instruction drawings. A data sheet is provided specifying major parts, settings, and optional items.

Warning

Improper use of this product can cause serious injury or property damage. Personnel dealing with this equipment should read and understand warning labels and instruction manuals provided by Thermco.

The Model 7000 is not intended to measure oxygen/nitrogen mixtures for breathing air, oxygen purity, or other medical applications.

The Model 7000 is not designed to be used with toxic gases or gases corrosive to brass or nylon.

Ordering Information

Thermco gas analyzers are available through many local industrial gas suppliers. Thermco gas analyzers may also be ordered directly from the factory.