Ametek Thermox WDG-V WDG-IV UOP UOP/RP Continuous Catalyst Regeneration Oxygen Analyzer for UOP Process

When you license a UOP CCR Platforming process, the P&ID already shows an Ametek WDG analyzer on the regenerator flue gas. That’s it – no alternatives. The reason is simple: the sensor sits directly in 650–720 °C flue gas full of chlorine, catalyst dust and water. Normal “cold-wall" analyzers die in weeks. The WDG-V UOP (newer) and WDG-IV UOP (old workhorse) are built different – the zirconia cell is close-coupled, the whole probe is heated to 300 °C, and the blowback actually works. Most units get a cell change every 4–6 years and keep running.

• Close-coupled sensor – no sample line to plug with cat fines
• Whole probe heated to 300 °C – no acid condensation
• Real automatic blowback every few hours – keeps the filter clean
• WDG-V UOP has color touchscreen and USB data log
• WDG-IV UOP still preferred by old-timers because it never breaks
• Both give 0–1% and 0–10% O₂ ranges for burn and combustion control

• UOP CCR Platforming regenerator flue gas
• Some Axens and ExxonMobil CCR units also specify them
• Chlorine-rich combustion zones in catalyst plants

Q: How often do I change the zirconia cell?
A: Usually 4–6 years, some plants hit 8 years.

Q: Can I just buy any zirconia analyzer?
A: No – UOP will reject it during HAZOP if it’s not WDG-IV/V UOP.

Q: Spare parts for the old WDG-IV?
A: Still made in USA, next-day ship from stock.

Ametek Thermox
Email: edwardzhao@gbsxj.com

Phone/WhatsApp/WeChat: +8615000725058

• WDG-V Zone 1 version for worse locations
• WDG-Insitu for boiler combustion
• Replacement cells and filters for old WDG-IV