The Ametek Thermox WDG-IV UOP and WDG-V UOP analyzers are specialized instruments built for reliable low-level oxygen measurement in UOP Continuous Catalyst Regeneration (CCR) processes. These analyzers were developed in partnership with UOP requirements to monitor oxygen during the regeneration cycle where oxidation removes coke from the catalyst. They help prevent thermal damage and support efficient conversion of paraffins and naphthenes to aromatics in hydrocarbon processing.
Using a specially treated zirconium oxide cell that withstands halogen oxidation effects, the analyzers deliver consistent performance. A nitrogen-operated aspirator draws the sample gas from the catalyst regenerator, passing a portion over the zirconia sensor before returning the sample to the process since the aspirator gas contains no oxygen. All wetted parts are heated above the dew point to eliminate corrosion risks, with Hastelloy probe options available for added durability.
Key features include high reliability, optional or standard dual isolation valves for sensor replacement without process shutdown, and proven track record since 1980 in CCR applications. The WDG-V version builds on this with advanced WDG-V electronics platform offering predictive diagnostics, proactive alarms, SIL-2 capability, and improved digital communications.
| Specification | Details |
|---|---|
| Principle | Close-coupled nitrogen-aspirated zirconium oxide for net O2 |
| Output Range | 0-1% to 0-100% O2 |
| Accuracy | ±0.75% of measured value or ±0.05% O2 (greater) |
| Response Time | 90% step change typically under 30 seconds |
| Drift | <0.1% cell output per month |
| Aspirator | Nitrogen 10-20 scfh at 15-100 psig |
| Probe | Hastelloy C, standard lengths |
| Wetted Parts | Heated 316 SS (Hastelloy C option) |
| Max Dewpoint | 392°F (200°C) |
| Communications | Modbus RTU, analog outputs, alarms |
| Certifications | Class I Div 2, ATEX/IECEx Zone 2 options |
These analyzers serve the hydrocarbon processing and petrochemical sectors, particularly in UOP CCR Platforming units for precise oxygen control in catalyst regeneration.
Users often face sensor degradation from harsh conditions, potential corrosion, or downtime for maintenance. The heated design, special zirconia treatment, and isolation valves help address these effectively.
They provide modern replacements for earlier WDG series UOP analyzers with enhanced reliability and serviceability.
We supply genuine AMETEK products with strong technical knowledge, competitive pricing, and support focused on keeping your process running smoothly.
Standard configurations have a typical lead time of 6-8 weeks.
Contact us with your specific requirements including probe length, material options, certifications, and site conditions for a prompt quotation.
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