Description
The THERMOX PreMix 2000 analyzer accurately and continuously measures the proportions of oxygen and fuel in pre-mix gases, operating in either excess fuel or excess air conditions. The analyzer is fed a small sample of the air/fuel mixture burning it and them measuring the next oxygen or next excess fuel content of the mixture.
Features
- Measures air/fuel ration in open-flame applications where flue gas measurements are not practical.
- Measurement and display options include excess oxygen, excess fuel, combined excess oxygen to excess fuel. fuels/oxides, oxides/fuels and combustibles.
- Operates under either excess air (lean) or excess fuel (rich) conditions.
- Calculates calibration gas mixture concentration for excess fuel ranges.
- The 2000 Series microprocessor control unit provides a 4 line digital display, analog outputs, alarms, system and sensor diagnostics, software supported calibration.
Specifications
| Sensor | |
| Range | All or selected portions of the range from 100% to 0.1% excess oxygen and 0.1% to 50% Excess Fuel |
| Accuracy | ± 2% of measured value or ±0.1% O2, whichever is greater; ± 5% of measured value or .25% excess fuel, whichever is greater*. |
| Repeatability | ± 0.2% of measured value |
| Ambient Temperature | -5 to 158ºF (-20 to 70ºC) |
| Sample Flow Rate | 0.5 L/min. (1 scfh) |
| Bypass Flow Rate | – 50 L/min. max. (106 scfh) |
| Max. Sample Pressure | 10 psig |
| Power | 115 VAC ± 10%, 50/60 Hz., 1200 VA max.; 230 VAC ± 10%, 50/60 Hz., 2400 VA max. |
| Calibration Gas Flow Rate | 10 psig, 2.1 to 4.2 scfh (0.70 kg/cm2, 1.0 to 2.0 L/min.) |
| Excess Oxygen Calibration Gases | 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 |
| Excess Fuel Calibration Gases | CH4 /O2 /N2 Span: 40 to 60% of recorder output span CH4 /O2 /N2 Zero: 5 to 10% of recorder output span |
| Enclosure | NEMA 3R (IP14) |
| * Specifications based on 0-15% range, Natural Gas | |
