• Industry’s First High-performance, Long-life pH/ORP Sensor Available for a Broad Range of Processing Applications

Water/Wastewater

Industry’s First High-performance, Long-life pH/ORP Sensor Available for a Broad Range of Processing Applications

Feb 28 2008

Emerson Process Management has introduced the Rosemount® Analytical PERpH-X 3500 high-performance pH and ORP sensor, the industry’s first general-purpose pH sensor that includes advanced technologies for longer life in difficult processing applications, providing a lower total cost of ownership.
TheModel 3500 is the newest member of the PERpH-X family and is designed from the ground up to provide superior performance in the most aggressive fouling applications. It combines the high performance of the complete PERpH-X pH sensor family with the convenience of a wide range of mounting options making it ideal for use in numerous industries and processing applications.
The PERpH-X 3500 brings advanced, long-life technologies previously only available in sensors designed for specialised, demanding process applications. These include improved pH glass electrode durability, increased reference electrode stability and overall mechanical design reliability. This results in longer sensor life in challenging processes, faster response, less drift, higher accuracy, and minimised maintenance requirements.
Most pH measurements fail due to fouled or poisoned electrolytes and clogged reference junctions, which are the most common reference electrode problems.
The PERpH-X sensor family features an enhanced double junction electrode that excels in harsh applications, and the specially designed porous Teflon liquid junction has a large surface area to maintain a steady reference signal in dirty and fouling applications.
The large surface area and high porosity also minimise junction potentials leading to accurate measurements without standardisation. The porous Teflon reference junction is easily replaced if it becomes fouled or plugged.
The reference electrolyte is a chemically inert viscous gel that is unaffected by thermal or pressure cycling. With the junction removed, the outer reference electrolyte can be recharged using a gel-filled syringe supplied in the various solution kits available as an
accessory. Replacing a clogged junction or recharging the electrolyte will rejuvenate most failed sensors. Proper preventative maintenance can dramatically extend the life of the sensor by minimising the depletion or poisoning of the primary reference.

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