There is no glass formulation currently available that has zero sodium ion error (alkaline error). Since there will be some error, it is important that the error be constant and reproducible. With many glass formulations this is not possible, because the electrode becomes sensitised to the environment that it was in prior to the high pH. For example, the exact start point of an electrode's sodium ion error might be 11,5 pH after immersion in tap water (+8 pH) but 12,5 pH after being in an alkaline solution (+10 pH).
The GLI pH sensors from PREI Instrumentation use a specially formulated glass, which like all electrodes exhibits a sodium ion error. This glass however, is unique in that the sodium ion error is constant throughout the electrodes lifetime. This is accomplished by 'controlled molecular etching' of the glass which purposely strips away one molecular layer at a time. This special characteristic provides a consistent amount of lithium ions available for exchange with the hydrogen ions to produce a similar millivolt potential for a similar condition.
As we know it is possible to control a process, if there is a known and consistent error in the measuring system, but impossible to control if the error is not consistent or repeatable.
For more information contact Steve Herbst, PREI Instrumentation, 011 448 2172, [email protected]
Ensuring clean and safe water Endress+Hauser South Africa
Editor's Choice Analytical Instrumentation & Environmental Monitoring
Endress+Hauser’s comprehensive range of disinfection sensors is designed to monitor and control disinfectant levels in water treatment processes.
Read more...Electrical fire safety in lithium-ion battery rooms
Fire & Safety Residential Estate (Industry) Products & Solutions
Pratliperl is a non-combustible, ultra-lightweight aggregate that can be mixed with cement and applied as a plaster or screed to walls, floors, and ceilings. When applied at just 30 mm thickness, it delivers a two-hour fire rating.
Read more...The first choice for electric fence management Stafix
Perimeter Security, Alarms & Intruder Detection Residential Estate (Industry) Products & Solutions
In South Africa, over 500 housing estates use JVA Perimeter Patrol, making it a widely used Electric Fence Management providing seamless integration with alarms, CCTV, VMS, access control and control room third-party software.
Read more...New JVA MBxL energiser range Stafix
Perimeter Security, Alarms & Intruder Detection Residential Estate (Industry) Products & Solutions
The latest MBxL energisers stand out for their simplicity, allowing you to push the “On” button and have the unit tick away, or to configure it through our virtual keypad (VKP).
Read more...Reliability, innovation and flexibility Entry Pro
Access Control & Identity Management Residential Estate (Industry) Products & Solutions
Through constant innovation and advancement in technology and systems, Entry Pro strives to provide its clients with not only the most suitable, but also the most advanced solution.
Read more...Smarter security with automated visitor management LD Africa
Access Control & Identity Management Residential Estate (Industry) Products & Solutions
Automated visitor management solutions, like LD Access, are transforming this process by reducing human workload, while enhancing security and efficiency.
Read more...Know where your asset is - not was
IoT & Automation Asset Management
To properly prevent loss of movable assets, companies need an early warning system, traceability throughout the chain of custody, and intelligence on parameters such as temperature, humidity, and impact.
Read more...Stronger cloud protection Kaspersky
Information Security Products & Solutions
Kaspersky has announced the release of an enhanced version of its Kaspersky Cloud Workload Security, delivering advanced protection for hybrid and multi-cloud environments.
Read more...High-precision measurement of insulating gases WIKA Instruments
Analytical Instrumentation & Environmental Monitoring
WIKA has launched the next generation of its GA11 gas analyser. It enables switchgear operators, manufacturers and maintenance companies to record the quality of SF6 gas and alternative insulating gases.
Read more...Check Point launches open, vendor-neutral MDR services
Information Security News & Events Products & Solutions
New Check Point MDR 360° and MXDR 360° offerings deliver 24/7 managed continuous threat monitoring protection across endpoints, cloud and network environments with built-in identity threat detection and 160+ integrations across hybrid, multi-vendor 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