EMERSON INTRODUCES THE PERpH-X 3500, INDUSTRYS FIRST HIGH-PERFORMANCE, LONG-LIFE PH/ORP SENSOR AVAILABLE FOR A BROAD RANGE OF PROCESSING APPLICATIONS

Phil Black - PII Editor 01/11/2007

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Emerson Process Management introduces 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.

The Model 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.

The available Solution Kits optimise the PERpH-X 3500 performance by keeping the porous Teflon reference from coating and the electrolyte from fouling. Six solutions are available as electrolyte kits: high-temperature; bio-film-resistant; poisoning-resistant; oil-resistant; scaling-resistant and metals-resistant. Each kit contains a treated porous Teflon reference junction and a specially formulated electrolyte to extend the life of the reference electrode in its targeted application.

In addition, the AccuGlass pH glass electrode provides exceptional resistance to thermal and caustic degradation, resulting in less breakage from thermal stress or shock and faster response rates for fast and accurate calibrations even after months of service. The PERpH-X 3500 provides near-theoretical response for pH measurement, even at extreme values, and minimal hysteresis, and is designed with a removable, slotted tip that protects the glass bulb from direct impacts while in service and during calibration. Further assuring the sensor can withstand the demanding environments present in harsh chemical processing applications, the sensor features a moulded Ryton body and EPDM, Viton or Kalrez o-rings.

For more information contact Emerson Process Management, Stockport, Cheshire

Tel: 0870 240 1978 Fax: 0870 240 4389

Email: uk-irelandsales@EmersonProcess.com Web: www.EmersonProcess.eu