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Thermox analyzers from Ametek are among the most established combustion monitoring and control devices available today. A broad range of products is available for analyzing oxygen, combustibles, and methane in combustion flue gases for combustion control, safety, and thermal NOx reduction. Industries served include Electric Power Generation, Petroleum Refining, Petrochemical Processing, Cement & Lime Manufacturing, Glass and Ceramics,
Pulp & Paper, Iron & Steel, and Non-Ferrous Metals production.
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Furnace and Inert Atmosphere Control Analyzers
Oxygen analyzers for PPM O2 in inert blanketing gases and extended-range oxygen analyzers for monitoring premix burner atmospheres in glass, metal, and ceramics coating, curing and surface treating furnaces.
PreMix 2000 Download printable brochure.
The Need
Forehearth zone temperature is critical to proper flow of molten glass to fiber forming equipment. The combustion atmosphere in fiber forming baskets is equally important to ensure fiber quality and consistancy. Forehearth zone temperature and fiber forming atmosphere are both controlled by adjusting the air to fuel ratio of discrete premix burner stations feeding these systems. Continuous analysis of resultant excess oxygen or excess fuel from air
to fuel ratio adjustments is needed to automate the glass fiber manufacturing process.
The Solution
The PreMix 2000 analyzer provides continuous feedback of excess oxygen or excess fuel resultant from air to fuel ratio settings on premix burner station output. The PreMix sensor takes a sample of the premixed gas, ignites and burns the sample in an internal catalytic chamber and measures the resultant excess oxygen or excess fuel with a specially treated zirconium oxide sensing cell. The durable stainless steel sensor enclosure facilitates mounting near premix
station for minimum sample transport delay and maximum feedback response.
The 2000 Series microprocessor control unit provides a 4 line digital dysplay, analog outputs, alarms, system and sensor diagnostics, software supported calibration.
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Specifications
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Sensor
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Range:
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All or selected portions of the range from 100% to 0.1% excess oxygen and 0.1% to 50% Excess Fuel
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Accuracy:
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± 2% of measured value or ±0.1% O2, whichever is greater; ± 5% of measured value or .25% excess fuel, whichever is greater*.
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Repeatability:
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± 0.2% of measured value
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Ambient Temperature:
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-5 to 158ºF (-20 to 70ºC)
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Sample Flow Rate:
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0.5 L/min. (1 scfh)
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Bypass Flow Rate:
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- 50 L/min. max. (106 scfh)
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Max. Sample Pressure:
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10 psig
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Power:
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115 VAC ± 10%, 50/60 Hz., 1200 VA max.; 230 VAC ± 10%, 50/60 Hz., 2400 VA max.
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Calibration Gas Flow Rate:
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10 psig, 2.1 to 4.2 scfh (0.70 kg/cm2, 1.0 to 2.0 L/min.)
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Excess Oxygen Calibration Gases:
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O2 Span Gas: 20.9% (air) or from 1.0 to 100% O2, balance N2
O2 Zero Gas: 2% or from 0.1% to 10% O2, balance N2
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Excess Fuel Calibration Gases:
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CH4 /O2 /N2 Span: 40 to 60% of recorder output span
CH4 /O2 /N2 Zero: 5 to 10% of recorder output span
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Enclosure:
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NEMA 3R (IP14)
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* Specifications based on 0-15% range, Natural Gas
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Ametek Main Page - Thermox - Western Research - Process Instruments - Dycor - Land - Chandler - Trace Analytical
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