Level sensors receive SIL-2 rating for use with safety systems

New certification allows Honeywell Flexline devices to be used with overfill protection systems.


Honeywell has announced that its FlexLine level gauges have been approved by TÜV for use in Safety Integrity Level-2 (SIL-2) rated loops, allowing industrial facilities to use the devices in applications that require certification to prevent safety incidents. FlexLine is used in overfill protection loops to prevent product spills and mitigate the likelihood of a catastrophic accident. 

“Safety is on everybody’s minds due to several recent incidents, so there is naturally an increasing awareness of process safety and how it can better protect people, the environment, and assets,” said John Joosten, product manager, Honeywell Process Solutions. “The SIL-2 certification for our FlexLine devices will give users access to greater safety measures and meet the standards that affect everyday oil and gas operations.”

Key enhancements to the FlexLine gage family include an improved safe failure fraction of more than 90%, which permits uses in SIL-2 safety loops. Diagnostics within the devices have also been improved, which extends the safety proof-test interval to four years to mitigate operational costs and strengthen reliability, depending on the safety requirements on the loop.

Additional safety functions make use of a dual redundancy which automatically detects failures in the safety circuitry, isolates and reports those failures, and still allows the gage to continue to function as a safety device without interrupting the process. This new device adds to Honeywell’s larger offering aimed at oil and gas terminal safety applications.


Edited by Peter Welander, pwelander@cfemedia.com

Visit the Control Engineering Process Control Channel.

No comments
Consulting-Specifying Engineer's Product of the Year (POY) contest is the premier award for new products in the HVAC, fire, electrical, and...
Consulting-Specifying Engineer magazine is dedicated to encouraging and recognizing the most talented young individuals...
The MEP Giants program lists the top mechanical, electrical, plumbing, and fire protection engineering firms in the United States.
Salary survey: How much are you worth?; Dedicated outdoor air systems; Energy models and lighting
Fire, life safety in schools; Fire protection codes; Detection, suppression, and notification; 2015 Commissioning Giants; Emergency and standby power in hospitals
HVAC and building envelope: Efficient, effective systems; Designing fire sprinkler systems; Wireless controls in buildings; 2015 Product of the Year winners
Designing positive-energy buildings; Ensuring power quality; Complying with NFPA 110; Minimizing arc flash hazards
Implementing microgrids: Controlling campus power generation; Understanding cogeneration systems; Evaluating UPS system efficiency; Driving data center PUE, efficiency
Optimizing genset sizing; How the Internet of Things affects the data center; Increasing transformer efficiency; Standby vs. emergency power in mission critical facilities
As brand protection manager for Eaton’s Electrical Sector, Tom Grace oversees counterfeit awareness...
Amara Rozgus is chief editor and content manager of Consulting-Specifier Engineer magazine.
IEEE power industry experts bring their combined experience in the electrical power industry...
Michael Heinsdorf, P.E., LEED AP, CDT is an Engineering Specification Writer at ARCOM MasterSpec.