Chlorine is an important building block in chemistry and is used in a large number of manufacturing procedures. Production of chlorine from the chlor-alkali process is through the electrolysis of brine (a saturated sodium chloride solution). Although three production processes exist: mercury cell, diaphragm cell and membrane cell, the latter process is nowadays preferred for environmental and energy consumption reasons.
For the purpose of yield on one side, and equipment integrity on the other, accurate pH control is of the utmost importance throughout the chlor-alkali membrane process. Elevated temperatures and the presence of oxidants typically make the measurement of pH problematic as they affect the performance of pH electrodes. Mettler Toledo’s InPro 4850i combination pH electrode incorporates a sodium-sensitive glass membrane that uses the sodium concentration of the chlor-alkali process brine as a reference. This reference system has no diaphragm and is therefore immune to chlorine and other oxidising agents, ensuring long sensor lifetime.
The InPro 4850i is a dual-membrane pH electrode that has been designed to provide long-term accurate measurement in chlor-alkali processes. The main difference in measuring technology between the InPro 4850i and conventional pH electrodes is the presence of a sodium-reference (pNa) system. The electrode features a sodium-sensitive glass membrane which is charged by the sodium ions in the brine.
The sodium concentration in the brine is used as a reference. The pNa reference system is hermetically sealed; there is no diaphragm, therefore no oxidants can enter the electrode and attack the reference system. The electrode also features a high-alkali resistant pH membrane glass for pH measurement. It is the amalgamation of pH measurement and pNa reference that makes the InPro 4850i highly suited to pH and ORP measurements in the chlor-alkali industry.
The InPro 4850i features Mettler Toledo’s intelligent sensor management (ISM) technology with digital signal conversion to avoid high impedance signal transition to the transmitter. ISM also offers sensor self-diagnostics, pre-calibration of sensors, as well as plug and measure start up to simplify installation and maintenance tasks. ISM improves sensor handling, enhances reliability and reduces sensor lifecycle costs.
The car of the future listens
Sensors & Transducers
The perception of external sounds in cars has been lacking, even in automated driving. That is why Fraunhofer IDMT-HSA is researching the integration of acoustic sensor technology in its KI4BoardNet project with the Hearing Car.
Read more...Telco Sensors for blocked or empty chute detection
Sensors & Transducers
In most industries there is a problem with photoelectric sensors as highly contaminated environments make it difficult to operate and sense reliably. Telco Sensors overcomes this through its powerful high-performance infrared sensors that ensure penetration of harsh pollution to guarantee reliable detection.
Read more...High-performance LineScan camera
Sensors & Transducers
Lynred, a global leader in infrared imaging technologies, has launched its next-generation SWIR LineScan camera and sensor, specifically designed for the inspection of silicon wafers, solar panels and waste management.
Read more...Online monitoring solution optimises asset performance across SKF South Africa
Sensors & Transducers
SKF’s sales, service and management teams has joined forces to deliver an advanced, integrated online monitoring solution for a key customer in Tunisia, operating nine mines, five plants and eleven production lines.
Read more...OMRON launches new non-contact
Sensors & Transducers
OMRON has unveiled its latest innovation in non-contact safety door switches, the D40A-2, which is designed to enhance workplace safety and streamline machinery operations.
Read more...Vibration monitoring in three axes ifm - South Africa
Sensors & Transducers
Machine vibrations are important indicators when it comes to assessing the current condition of a machine. ifm’s new and smart IO-Link vibration sensor helps to implement a simple and scalable condition monitoring approach using but a single device.
Read more...Smart solutions for weighing in hazardous milling zones
Sensors & Transducers
Minebea Intec supplies highly accurate weighing and inspection solutions that enable milling companies to organise their processes safely, efficiently and compliantly - even in hazardous areas.
Read more...Optimise sludge treatment and reduce operational costs
Sensors & Transducers
The Endress+Hauser inline measuring devices, the Proline Teqwave MW 300 and the Proline Teqwave MW 500, determine the total solids content of wastewater directly through microwave transmission. This is considerably less time consuming than the process of determining total solids content in a laboratory.
Read more...Family of analysers for smart and efficient chlorine measurement ABB South Africa
Sensors & Transducers
ABB has launched ChloroStar, a family of sensors, transmitters and accessories for accurate and reliable chlorine measurement and analysis that enable users in the water, wastewater and other industries to control chlorine more efficiently, enhancing treatment and increasing process uptime.
Read more...Leading the way with Level 9 PDS implementation
Sensors & Transducers
Applying a Level 9 Proximity Detection System (PDS) to a mining operation is as much about changes in behaviour as it is about technical solutions, according to Pieter Wolfaardt from Apex, Booyco Electronics’ training partner of choice.
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