Many would believe that a balanced system, with its equal length capillary applied to both high and low side seal of the sensor is the optimum arrangement. Rosemount believes differently.
Rosemount's tuned-system approach has the DP cell mount directly on the high side, with a capillary to the low side seal.
Assume both systems incur an identical process and ambient temperature increase from original zero. Total system error equals the sum of temperature error and head error. Head error is always greater than temperature error. Both head errors are the same, as the distance between process taps is identical.
When evaluated in a scenario having 3" FFW-style seals on the tank with height difference of 3 m between taps, with the system zeroed at 20°C, installed in a 150°C process, with an ambient temperature of 37°C - it noted that the tuned system reduce errors by 10%, improves response times 80%, and actually costs 20% less to implement.
Savings in implementation come from the fact that no mounting bracket, mounting stand or excess capillary is required.
With regards accuracy
Balanced systems hurt performance:
* Only address temperature effect; yielding zero temperature effect errors.
* Do not address head error; fill fluid density changes as temperature changes.
(Head error is the largest system error.)
Tuned-systems improve performance:
* They compensate for head error.
* They yield a reduction in total system error.
* Improve time response by 80%.
* Improve total error by 10%.
(Value Proof 28 is available from Alpret Control Specialists - for those wanting more details).
The company also offers Instrument Toolkit, which allows users to specify a tuned-system and calculate the performance difference in their own scenario.
Tuned-Systems are offered as a standard design, available with virtually any diaphragm seal type and configured as either a direct mount or liquid level transmitter. Tuned-Systems are engineered exclusively by Rosemount.
Groundwater level measurement using LoRa module Instrotech
Level Measurement & Control
Monitoring groundwater levels across large industrial sites is critical. Salzgitter Digital Solution was tasked with developing a fully automated and digital monitoring system using Long Range Wide Area Network technology.
Read more...Where corrosion meets control VEGA Controls SA
Level Measurement & Control
Reliable level measurement is essential in copper and cobalt processing, and at KCC, VEGA Controls is helping ensure uninterrupted operations with robust vibrating level switch technology.
Read more...Safety, hygiene and quality management for Africa’s pharmaceutical manufacturing industry VEGA Controls SA
Level Measurement & Control
VEGA sensors support critical processes in pharmaceutical manufacturing such as fermentation, purification, formulation, filling, storage and CIP/SIP cleaning cycles. Their design ensures that pharmaceutical manufacturers can maintain sterility, reduce downtime and achieve consistent batch quality, even in demanding production environments.
Read more...Level measurement for hygienic applications Endress+Hauser South Africa
Level Measurement & Control
Endress+Hauser’s Liquiphant is considered to be the most reliable and safe point level detector in industrial plants. The latest generation of devices is ready for Industry 4.0 and, with the Liquiphant FTL63, is ideally suited for applications with hygienic requirements.
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...Sensors measure palm oil tank level Instrotech
Level Measurement & Control
The Senix ToughSonic 30 accurately measures and monitors the level of palm oil in large tanks approximately nine metres in height.
Read more...Precise level control
Level Measurement & Control
Whether in silos, tanks or process containers, the exact detection of fill levels is crucial for stable, safe and economical production processes. However, many common measuring methods quickly reach their limits in practice.
Read more...Powering Africa’s sustainable mining VEGA Controls SA
Editor's Choice Level Measurement & Control
At the 2026 Mining Indaba in Cape Town, one theme rises above all others, progress through precision. For VEGA, a global leader in process instrumentation, this mission aligns perfectly with its core purpose, which is turning measurement into meaningful progress.
Read more...VEGA is redefining synthetic fuel production VEGA Controls SA
Level Measurement & Control
Polish company, Ekobenz specialises in producing bio-hydrocarbons. The company utilises advanced manufacturing techniques where VEGA sensors monitor levels and interfaces, essentially overseeing separation layers in the process.
Read more...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.
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