Sanitary level switch tolerates high temperatures

LFFS sensor from Baumer detects liquids and dry media, offers multiple output options.


Baumer LFFS Level Sensor family.Baumer’s level switch LFFS detects the level of liquids, viscous fluids, and even dry media. For particularly difficult materials like adhesive substances, the teach-in function enables a manual adjustment of the level to be detected. The switching status can be chosen as normally open or normally closed. The output type can be user set to PNP, NPN, or digital out. All wetted parts are made of FDA-approved stainless steel or PEEK thermoplastic, and the unit has earned 3A approval. For the use in open or closed tanks, the device withstands a pressure of up to 580 psi (40 bar). Since the switch does not contain any moveable parts and its electronic unit is completely integrated, it is practically maintenance-free.

Baumer’s level switch LFFS is suitable for high process temperatures of up to 200 °C. A bright blue light on top of the switch shows when a media is detected. The indication can be seen easily even if the sensor is mounted on top of a tank. The process connection makes it suitable for food and beverage industry applications. For the use in hazardous areas, different ATEX versions are available. It can be easily configured on PC via the FlexProgrammer 9701.

When used with a cooling neck, the level switch is suitable for process temperatures from -40 to 200 °C. The optional sliding connection is available in 100 and 250 mm length and can serve as a cooling neck or extension, for example if the medium has to be reached through the tank insulation or the level detection has to be adjusted to a certain height. In the standard version, the LFFS is designed for permanent process temperatures from -40 to 85 °C as well as for the use in CIP and SIP facilities with short-term temperatures of up to 140 °C (max. one hour).

For applications in gaseous and dusty surroundings, the LFFS is available in different ATEX versions which enable a safe level detection of explosive gas or dust mixtures. The ATEX certifications cover the zones 0, 1, and 2 as well as zones 20, 21, and 22.

Edited by Peter Welander,

Visit the Control Engineering Process Control Channel.

Read What is a sanitary device?

No comments
The Top Plant program honors outstanding manufacturing facilities in North America. View the 2013 Top Plant.
The Product of the Year program recognizes products newly released in the manufacturing industries.
The Engineering Leaders Under 40 program identifies and gives recognition to young engineers who...
A cool solution: Collaboration, chemistry leads to foundry coat product development; See the 2015 Product of the Year Finalists
Raising the standard: What's new with NFPA 70E; A global view of manufacturing; Maintenance data; Fit bearings properly
Sister act: Building on their father's legacy, a new generation moves Bales Metal Surface Solutions forward; Meet the 2015 Engineering Leaders Under 40
Cyber security cost-efficient for industrial control systems; Extracting full value from operational data; Managing cyber security risks
Drilling for Big Data: Managing the flow of information; Big data drilldown series: Challenge and opportunity; OT to IT: Creating a circle of improvement; Industry loses best workers, again
Pipeline vulnerabilities? Securing hydrocarbon transit; Predictive analytics hit the mainstream; Dirty pipelines decrease flow, production—pig your line; Ensuring pipeline physical and cyber security
Upgrading secondary control systems; Keeping enclosures conditioned; Diagnostics increase equipment uptime; Mechatronics simplifies machine design
Designing positive-energy buildings; Ensuring power quality; Complying with NFPA 110; Minimizing arc flash hazards
Building high availability into industrial computers; Of key metrics and myth busting; The truth about five common VFD myths

Annual Salary Survey

After almost a decade of uncertainty, the confidence of plant floor managers is soaring. Even with a number of challenges and while implementing new technologies, there is a renewed sense of optimism among plant managers about their business and their future.

The respondents to the 2014 Plant Engineering Salary Survey come from throughout the U.S. and serve a variety of industries, but they are uniform in their optimism about manufacturing. This year’s survey found 79% consider manufacturing a secure career. That’s up from 75% in 2013 and significantly higher than the 63% figure when Plant Engineering first started asking that question a decade ago.

Read more: 2014 Salary Survey: Confidence rises amid the challenges

Maintenance and reliability tips and best practices from the maintenance and reliability coaches at Allied Reliability Group.
The One Voice for Manufacturing blog reports on federal public policy issues impacting the manufacturing sector. One Voice is a joint effort by the National Tooling and Machining...
The Society for Maintenance and Reliability Professionals an organization devoted...
Join this ongoing discussion of machine guarding topics, including solutions assessments, regulatory compliance, gap analysis...
IMS Research, recently acquired by IHS Inc., is a leading independent supplier of market research and consultancy to the global electronics industry.
Maintenance is not optional in manufacturing. It’s a profit center, driving productivity and uptime while reducing overall repair costs.
The Lachance on CMMS blog is about current maintenance topics. Blogger Paul Lachance is president and chief technology officer for Smartware Group.