Yokogawa ZR202S Integrated type Explosion-proof Zirconia Oxygen Analyzer
ZR202S Yokogawa zirconia oxygen analyzer is a Integrated Explosion-proof type which combines a probe and a converter. Both Zirconia oxygen analyzers do not need a sampling device, and allow direct installation of the probe in the wall of a flue or furnace to measure the concentration of oxygen in the stack gas. The converter displays the cell temperature and cell emf in addition to the oxygen concentration.
ZR202S Yokogawa zirconia oxygen analyzer is most suitable for monitoring combustion and controlling the low-oxygen combustion of various industrial furnaces in explosive atmospheres at petroleum refineries, petrochemical plants, and natural gas plants.
ZR202S zirconia oxygen analyzer owns below typical features:
1. The built-in heater assembly of the probe can be replaced on site, reducing maintenance costs
2. The probe uses a long-life, high-reliability Zirconia sensor
3. Remote maintenance using digital communications(HART) reduces maintenance costs
4. Wide range of wetted part material optional, SUS 316 (JIS), Hastelloy, Inconel
5. Integrate both probe and converter, to reduce wiring, piping, installation costs.
6. Measure either oxygen concentration or humidity
7. Infrared switch operation
8. Explosion-proof design
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ZR202S SPECIFICATION
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Measurement object
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Oxygen concentration in combustion exhaust gas and mixed gas
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Measurement system
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Zirconia system
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Display
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6-digit LCD
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Switch
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Three optical switches
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Explosion-proof Approval
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ZR202S-A (ATEX); EEx d IIB + H2
ZR202S-B (FM); Class I, Division1, Groups B, C and D ZR202S-C (CSA); Class I, Division1, Groups B, C and D ZR202S-D (IECEx); Ex d IIB + H2 T2 |
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Measurement range
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0.01 to 100 vol%O2
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Output signal
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4 to 20 mA DC, one point (maximum load resistance 550Ω)
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Setting range
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Any setting in the range of 0 – 5 vol%O2 to 0 – 100 vol%O2 (in 1 vol%O2), or partial range
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Digital communication (HART)
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250 to 550 Ω, depending on number of field devices connected to the loop (multi-drop mode)
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Sample gas pressure
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-5 to +5 kPa
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Sample gas temperature
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0 to 700℃ (Probe only)
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Probe length
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0.4, 0.7, 1.0, 1.5, 2.0 m
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Contact output
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Two points (one is fail-safe, normally open)
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Contact input
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Two points
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Calibration
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Method ; zero/span calibration
Calibration mode ;automatic, semi-automatic and manual (with optical switch) |
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Construction
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Heater and thermocouple replaceable construction, equivalent to NEMA4X/IP66
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Ambient temperature
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-20 to 55℃
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Power supply
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85 to 264 V AC; 45 to 66 Hz
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