LONG LIFE pH SENSOR
November 1st 2007 Available from Emerson Process Management, the Rosemount Analytical PERpH-X 3500 is the company's latest high performance sensor. It includes advanced technologies for longer life in difficult processing applications. Features include improved pH glass electrode durability, increased reference electrode stability and overall mechanical design reliability. The company says that this results in longer sensor life in challenging processes, faster response, less drift, higher accuracy and low maintenance requirements. The PERpH-X sensor family features an enhanced double junction electrode that functions well 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 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. More articles from Emerson Process Management: | 
