The terms functional safety and safety integrity level (SIL) have occurred more frequently since the publication of the international standard IEC 61508/IEC 61511. Particularly in systems with hazard-causing processes, such as in chemical plants, the consideration of functional safety has become indispensable. On this basis, safety-related practices, design principles and error considerations must be met to minimise the risk of a dangerous failure.
UWT’s rotary paddle level switch for overfill and dry run protectionThe UWT engineers focused on this topic and redesigned the rotating paddle switch Rotonivo RN 6000 series according to the normative requirements of functional safety to ensure safety functions and risk mitigation in accordance with SIL2. Typical safety functions are over-fill and dry-run protection.
Depending on the requirements, the Rotonivo rotary paddle switch is used as a full, demand or empty detector in storage silos or process vessels and is suitable for use in almost all solids. With its simple electromechanical measuring principle, it can also be adapted for extreme process conditions. A motor driven shaft causes the vane to rotate. Once the material level reaches the vane, thereby preventing further rotation, this creates a torque, which is converted via a switch to an electric signal. Once the vane is free again of the material, the output signal is reset and the motor driven shaft rotates again.
As part of the functional safety issue, the electronics of the rotating paddle series have been configured so that any failure of electrical components leads to a safe switching state of the output signal thus avoiding potential system hazards. With the innovative SIL2 compliant Rotonivo RN 6000 series, operators of safety-related systems have access to a level sensor in accordance with the specified SIL.
Precision in paper processing VEGA Controls SA
Editor's Choice Level Measurement & Control
Paper manufacturing is a demanding process that relies on consistency, precision and control at every stage. The VEGABAR 82 pressure transmitter is well-suited to these harsh environments.
Read more...Where every grain counts VEGA Controls SA
Level Measurement & Control
VEGA’s advanced level and pressure measurement solutions offer transformative technologies to improve grain storage management in sub-Saharan Africa.
Read more...Small, inexpensive radar level transmitters VEGA Controls SA
Level Measurement & Control
Anyone who needs to keep processes running needs level measurement technology that measures reliably. However, what is needed is not always the most ‘fully featured’ solution, but the smartest one. This is exactly what VEGAPULS radar transmitters of the BASIC series do.
Read more...Meeting the challenges of tank obstructions interfering with radar
Level Measurement & Control
One of the most challenging applications for non-contacting radar level transmitters is measuring level in tanks with internal obstructions, such as agitators, heating coils, pipes, ladders or baffles. Rosemount non-contacting radar level transmitters from Emerson feature an advanced solution that enables accurate and reliable level measurements in tanks with obstructions.
Read more...A fresh approach to dairy processing VEGA Controls SA
Level Measurement & Control
Ensuring the quality and safety of milk throughout the production process is of the utmost importance in the dairy industry. The VEGABAR pressure transmitters are suitable for hygienic applications. They are an asset in the dairy industry and have been used with success for measuring the milk level and the process pressure in storage tanks.
Read more...Multiphase level measurement Mecosa
Level Measurement & Control
The measurement of more than two phases or of interfaces that are not clearly defined poses a number of challenges for measurement technology. Radiation-based measuring systems such as Berthold‘s EmulsionSENS master these problems.
Read more...Simple and efficient level measurement in the mining, minerals and metals industries Endress+Hauser South Africa
Editor's Choice Level Measurement & Control
Measuring devices in the mining, minerals and metals industries face the challenge of varying material states and long distances in measurement height. Endress+Hauser’s answer to these challenges is the new Micropilot family.
Read more...Level measurement of an acid dosing tank at a WWTP
Level Measurement & Control
Ferric chloride and other acids are essential chemical substances in water and wastewater treatment. To control the dosing of acid solutions, an Australian wastewater treatment plant uses a special container to store, mix and add these chemicals. The company opted in favour of KROHNE’s OPTIWAVE 1540 radar level transmitter
Read more...Powering sub-Saharan Africa’s energy future VEGA Controls SA
Level Measurement & Control
Crude oil storage plays an important role in the energy infrastructure of sub-Saharan Africa. The management of crude oil storage in comes with numerous challenges, including safety concerns, environmental conditions and infrastructural limitations.
While every effort has been made to ensure the accuracy of the information contained herein, the publisher and its agents cannot be held responsible for any errors contained, or any loss incurred as a result. Articles published do not necessarily reflect the views of the publishers. The editor reserves the right to alter or cut copy. Articles submitted are deemed to have been cleared for publication. Advertisements and company contact details are published as provided by the advertiser. Technews Publishing (Pty) Ltd cannot be held responsible for the accuracy or veracity of supplied material.
printer friendly version