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YOKOGAWA OX102 Limiting Current Type Oxygen Analyzer |
YOKOGAWA OX102 Limiting Current Type Oxygen Analyzer
The OX102 Oxygen Analyzer measures oxygen concentration from ppm to percent levels in a single analyzer and is ideal for ppm-level measurements in applications such as nitrogen reflow furnaces and semiconductor plants.
The zirconia oxygen sensor uses a method that is based on the limiting current principle and is compact, yet has high-performance. The sensor is designed for installation by direct insertion.
When a sample gas contains organic solvent at a few ppm to percent level in applications such as nitrogen reflow furnaces, an optional sampling unit is required.
Features
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One instrument capable of measuring 1000ppm to 25% oxygen |
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Simple one touch calibration |
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Self diagnostics assure high reliability |
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One touch sensor replacement |
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Compact size |
Specifications
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Measured gas |
O2 in N2 or mixed gases; cannot be used with silicone vapor, combustible gases and organic solvent |
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Measurement principle |
Zirconia limiting current method |
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Measuring range |
0 to 25% |
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Sampling method |
Natural diffusion system. If the sampled gas may include organic solvents, use a sampling unit. |
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Measuring gas conditions |
Atmospheric pressure, operating temperature; 0 to 70℃, gas flow up to 1 m/s |
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Output signal : 2 outputst |
4-20 mA DC automatic/manual switching mode, 1 to 5 V DC fixed (0-100 ppm/0-1000 ppm/0-10000 ppm/0-25%) |
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Output range |
0-100 ppm/0-1000 ppm/0-10000 ppm/0-25%, automatic/fixed switching mode |
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Contact output |
2 contact outputs |
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Calibration |
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a. Atmospheric air one-point calibration : 15 to 25% O2 range
b. One-point calibration at 100 ppm : 80 to 120 ppm O2 range
c. One-point calibration at 1000 ppm : 900 to 1100 ppm O2 range
d. One-point calibration at 10000 ppm : 8500 to 9500 ppm O2 range
e. Complete calibration : with air, 20, 100, 500, 1000, 10000 ppm in that order | |
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Extension cable |
4 m, 9 m, 29 m |
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Power supply |
100 to 240 V AC, 50/60 Hz, approx. 15 W |
Performance
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Repeatability |
±15 ppm O2( 20 to 100ppm range)
±25 ppm O2( 100 to 1000ppm range)
±0.3% of reading( 1000 to 5000ppm range)
±7.5% of reading( 5000 to 10000ppm range)
±0.25% O2( 1 to 25% range) |
Measuring Principle
Current flowing in the Zirconia fixed electrolyte causes oxygen to move from the negative to positive electrode (acts as an oxygen pump). If the flow of oxygen to the negative electrode is restricted by the alumina substrate then a current saturation area is created and the same current flows regardless of the applied voltage. The current that flows is called the limiting current. When a fixed voltage is applied, the current flow is proportional to the oxygen concentration.
Applications
- N2 reflow furnaces
- Semiconductor maker environmental monitoring
- ppm-level O2 measurement
- Monitoring purity of N2, Ar separated from air
- Monitoring for deficiency of O2
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