Temperature Sensing Equipment by Daily Thermetrics

Many refiners today want to monitor their reactor vessel wall temperatures in order to protect their investment.
A variety of obstacles are encountered in this vital application, such as ease of installation, ease of replacement, and welding to wall restrictions.

Traditionally, refiners monitored the reactor temperature with a basic weld pad thermocouple or a washer thermocouple. The weld pad cannot be replaced once it fails because welding to the reactor wall is not allowed, and the washer thermocouple is difficult to replace because it is buried under the insulation. In both cases, neither can be installed in a retrofit application.

Daily Thermetrics, the company that developed the patented CatTracker for reactor profiling, has developed two designs to tackle this critical application.

VSS Brochure

For new reactors, when welding is permitted, the platform of the Welded VSS is welded directly to the reactor wall. The length of the platform will vary depending on the insulation thickness. The sensor probe is then screwed into the platform, thus allowing for easy sensor replacement in the future.

(Shown with optional flexible conduit)
For new reactors where welding to the vessel is possible:

• Easily replaceable sensor probe
• Explosion Proof head is standard
• Spring loaded

For existing reactors, Daily Thermetrics offers the Magnetic VSS. The vessel insulation is cut away, and this VSS assembly is then simply placed into position without welding to the vessel.

For retrofit reactors where welding to the wall is not an option:

• Can be easily installed / relocated
• Max. Operating Temp.: 975 °F
• Explosion Proof head is standard
• Spring loaded