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Dual Seal – 100% leakage detection

Pressure-triggered safety valve for critical thermometer applications

Industrial processes often involve hazardous or explosive substances, requiring robust safety mechanisms to minimize risks. Over time, thermowells can develop cracks due to abrasion or corrosion, potentially allowing hazardous materials to escape during active processes or maintenance. The patented Dual Seal feature included in iTHERM ModuLine industrial thermometers provides an additional safety barrier in the event of thermowell failure or breakage.

Increased plant safety with the second process barrier

collage with 2 versions of Dual Seal ©Endress+Hauser

Dual Seal technology available for iTHERM ModuLine TM131 / TM151 / TM152

Benefits

  • No risk of hazardous leakages

  • Increased safety for maintenance personnel, plant and environment

  • Health monitoring & signal to PLC in case of activation

  • Additional health information from measurement device

  • Immediate sealing for containment of hazardous media

The Dual Seal mechanism detects a potential loss of thermowell integrity and immediately seals off the sensor insert, preventing the leakage of process medium into the terminal head, cabinet or environment. The temperature transmitter relays the message of the thermowell breakage to the process control system. This information is then used to bring the plant to a safe condition and prevent danger to people and the environment.

  • Simple products

  • Easy to select, install and operate

Technical excellence

Simplicity

  • Standard products

  • Reliable, robust and low-maintenance

Technical excellence

Simplicity

  • High-end products

  • Highly functional and convenient

Technical excellence

Simplicity

  • Specialized products

  • Designed for demanding applications

Technical excellence

Simplicity

Variable

FLEX selections Technical excellence Simplicity
  • F
  • L
  • E
  • X

Fundamental selection

Meet your basic measurement needs

Technical excellence
Simplicity
  • F
  • L
  • E
  • X

Lean selection

Handle your core processes easily

Technical excellence
Simplicity
  • F
  • L
  • E
  • X

Extended selection

Optimize your processes with innovative technologies

Technical excellence
Simplicity
  • F
  • L
  • E
  • X

Xpert selection

Master your most challenging applications

Technical excellence
Simplicity

Variable

Downloads

    • Brochure
    Application note cover image

    Enhanced safety in polymer production

    • Brochure

    iTHERM ModuLine TM131 with Dual Seal technology not only provides a second process barrier, but also signals when a fault is present, ensuring the safety of the operating personnel.