Gasanalyse
8863 Thermoparamagnetischer Sauerstoffanalysator
Rugged Oxygen analyser for inerting control and heavy-duty applications. Selected materials and modular design makes this analyser practically indestructible and the ideal solution for safety-critical industrial applications.
Rugged Oxygen analyser for inerting control and heavy-duty applications. Selected materials and modular design makes this analyser practically indestructible and the ideal solution for safety-critical industrial applications.
The weatherproof and explosion proof 8863 is designed for field installation in the most severe conditions, minimizing the sample conditioning requirements.
Measureable Gas
Oxygen [O2]
Main Features
Extreme Roughness
- No inner moving parts
- Wet parts in AISI316 (optional Hastelloy C276) and glass
- Resistant to corrosion by acid and solvents
High Performances
- Sensing unit temperature controlled
- Insensitive to ambient temperature variations
- Installation position and vibration don’t alter the accuracy and stability of the measure
- Available as 4-20 mA transmitter or combined with a powerful microprocessor-based control unit
Easy Maintenance
- Modular construction
- Fast access to the inner PCB just unscrewing the housing cap
- Possibility to remove the entire sensing unit from the housing just by unscrewing 2 screws and leaving her housing connected to the sampling system.
European Compliance
- Low Voltage Directive 2014/35/EU
- EMC Directive 2014/30/EU
- Directive ATEX 2014/34/EU (optional)
ATEX
ATEX certification for Zone 1 / Zone 21 with protection mode:
II 2 G D Ex db IIC T6 Gb
Ex tb IIIC T85°C Db
IP65
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Performance Specification |
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Accuracy |
± 1% of span (output signal). |
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Repeatability |
± 0.3% of span (short term). |
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Reproducibility |
24 hours: ± 1% of span. |
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Linearity |
with control unit: better than ± 0.5% of full scale |
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Response Time |
Initial: < 1 sec.; 90% of step-change: 30 sec. (with max. 2000 cc/min. flow rate) |
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Drift |
Zero: max. ± 1% of span per week |
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Ambient Temp. Influence |
± 0.002% O2 per °C or ± 0.07% of measure per °C |
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Ambient Temp. Influence |
- 1% of measure per °C max. |
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Atm. Pressure Influence |
± 0.18 % of reading per hPa |
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Flow Rate Influence |
< 0.5% of span over flow range of 250 to 1000 cc/min. |
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Line Voltage Influence |
max. 0.02% of span, for each 1% change of power voltage. |
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Gas Interference |
< ± 0.01% O2 reading per 1% CO2 |
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Operative Specification |
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Sample Requirements |
Flow Rate: 250 ÷ 1000 cc/min. |
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Range |
Refer to ordering information |
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Output |
non-normalized output current that functions as input of the selected ADEV control unit |
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Relative Humidity |
90% maximum. |
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Operation Temperature |
-10 ÷ +50°C (14 to 122 °F). |
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Temperature controlled |
at 50°C |
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Storage Temperature |
+70°C (158 °F) max. |
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Power Requirements |
24 ÷ 30 Vdc, 45 VA from dedicated power supplier. |
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Pneumatic Connections |
¼” or 6 mm OD tubing (compression fittings supplied) |
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Wiring Connections |
General purpose: 2 openings for G 3/8" (PG 13 cable grip). Ex-Proof: 2 openings for GK 1/2" (cable grip or conduit). |
Applications
- Inerting Control
- Centrifuges
- Reactor Feed Gases
- Chemical & Pharmaceutical
- Power Plants & Nuclear
- Sulphur Production
- Biogas & Landfill Gas
- Steel & Metal Processing
- Solvent Recovery
- Fertilizers
Sampling System
The 8863 needs an external sampling system able to deliver an almost clean sample gas to the analyser at the proper temperature, pressure and flow rate.
ADEV has a wide experience in process and can provide the 8863 analyser combined with a sample and condition system designed for the specific application requirements. Contact ADEV for details.
Measuring Principle
Thermoparamagnetic 8863 Oxygen analyzer allows the selective analysis of the O2 concentration in process gases taking advantage of its evident paramagnetic property that makes it attracted by a magnetic field.
The Cell Block assembly is made of stainless steel and contains the cell cavity and pole pieces which produce two powerful magnetic fields in the cavity. Associated with each field is a thermistor pair, consisting of a measuring thermistor and reference thermistor.
The measuring thermistor is mounted in the cavity within its respective magnetic zone; the corresponding reference thermistor is mounted in the cavity just outside its magnetic zone. A sample inlet port and a sample outlet port are arranged to permit a portion of the flowing sample to diffuse into the cavity, where it comes under the influence of thermal gradients and magnetic fields. The effect of the resulting thermo-magnetic action on the thermistors provides the measuring means.
