Measuring clean
Emerson introduces new sanitary transmitters and regulators

Control and instrumentation supplier Emerson Process Management has introduced several new compact transmitters and regulators that are approved for the most demanding applications in the life sciences.

The Rosemount 4500 sanitary pressure transmitter’s best-in-class SIP/CIP performance reduces temperature-induced errors, says Emerson Process Management. The transmitter’s improved stability reduces maintenance costs, while AMS compatibility simplifies FDA compliance.
Part of a new range of industry-specific Rosemount pressure transmitters,
the 4500 is designed exclusively for life-science applications. The transmitter has EHEDG and 3-A approval, and features high-quality electro-polished wetted surfaces, hygienic connections and a smooth, crevice-free housing suitable for clean rooms. Rosemount temperature transmitters likewise pay as much attention to the hygienic design of the external housing as was previously reserved for the wetted surfaces. Rosemount EHEDG-approved temperature sensors are available as in-line systems, in which the thermowell is part of a straight pipe section or elbow. This avoids dead space, ensures efficient CIP and SIP, and allows sensors to be exchanged without disturbing the process.

Conductivity and pressure regulation
The Rosemount Analytical Model 245 conductivity sensor is a toroidal flow-through pipe section design that is suitable for both CIP and SIP. The sensor is available in four sizes from 1/2-inch to
2-inch. With wetted parts made from FDA-compliant materials (316L stainless steel, EP and unfilled PEEK), the Model 245 meets all sanitary standards. Tri-Clamp end connections ensure convenient process installation.The Model 245 conductivity sensor resists fouling and corrosion, so it is suitable for fibrous or sticky liquids and aggressive cleaning chemicals. It can be used with a temperature sensor to monitor the composition of flowing iquids.Several of Emerson’s Fisher pressure regulators are also designed to sanitary standards, including the Fisher SR5 pressure and SR8 back-pressure regulators. These have 316L stainless steel wetted parts and bodies, including the spring case. All wetted parts are electro-polished. The Tri-Clamp end connections are matched by a quick-disconnect bonnet using a Tri-Clamp sealed joint. Such regulators are frequently used in water-for-injection (WFI) and clean steam applications. Also essential on pharmaceutical plants are gas blanketing systems to control the inert gas atmospheres in product and ingredient or solution storage vessels. Fisher regulators have been engineered in stainless steel and FDA/EHEDG-approved materials for use in the control of tank blanketing systems.