Model TFS396 Sanitary, Non-glass, ISFET pH sensor

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PROTECTS PROCESS INTEGRITY - no more pH glass breakage. IMPROVED MEASUREMENT STABILITY provided by the drift-free TUpH reference technology* and ISFET measuring electrode. Rapid response and accuracy even at cold temperatures. REDUCED CALIBRATION FREQUENCY due to increased sensor stability. RUGGED 316SST SANITARY DESIGN with maximum versatility. QUICK CABLE-TO-SENSOR RELEASE provided by waterproof electrode/cable connector. MINIMUM SENSOR MAINTAINANCE due to patented TUpH reference technology which ensures continued reference performance when the sensor becomes coated. COMPATIBLE for use with most traditional pH instruments.

FEATURES AND APPLICATIONS The ion-selective field effect transistor (ISFET) pH electrode provides a stable pH measurement. Its rate of response can be ten times faster than glass electrodes, enabling better process control. Its short response time and increased stability at low temperatures make it suitable for use in cold processes like brine or water for cooling. Aging effects caused by temperature fluctuations or large changes of process pH are greatly reduced, providing longer intervals between calibration and maintenance of the sensor. Because there is no glass bulb, it can be used in many applications that restrict or prohibit pH glass electrodes due to the risk of broken glass getting into the process. It may also provide longer sensor life in processes that will break or crack pH glass bulbs. By allowing direct installation into the process, costs for laboratory analysis of sample lines are greatly reduced. The TUpH Reference technology includes a large area reference junction for minimum maintenance requirements. The reference junction provides an electrical connection between the reference electrode and the sample, and helps maintain a stable reference potential, regardless of the change in sample pH. The TUpH reference electrode junction (the entire plastic tip surrounding the ISFET electrode) maintains a steady reference signal, even in dirty applications, by resisting plugging (a common cause of pH signal drift). This large reference junction area (400 times greater than typical Teflon® or ceramic junctions) is made of micron-sized reference pathways allowing for ionic exchange but preventing plugging by larger particles and will continue to send a steady pH signal, even in the dirtiest of applications. The field-proven TUpH reference junction technology results in greatly reduced maintenance requirements. The TUpH helical reference pathway resists reference poisoning. Ions diffuse through the reference pathways and a charge is passed to the reference element. The reference element must be protected from contamination by poisoning ions such as sulfide, mercury, cyanide, and ammonia that will cause reference drift and offsets. The TUpH sensor's long internal reference pathway hinders the contaminants' migration to the reference element thereby providing an increased sensor life. All TUpH sensor models — including our lastest addition, the TUpHFET — have been specifically designed for improved performance in harsh, coating, or abrasive applications where large quantities of suspended solids are present. The sanitary TUpHFET features an adjustable triclamp adapter to allow for in-line measurement in all your pipes or tanks with one model. The triclamp adapter can be placed on the sensor housing to allow from 2.55 to 6.0 inches of insertion depth from the face of the sanitary triclamp. The Model TF396 offers a watertight sensor-to-cable connector that prevents cable twisting and eliminates the need for rewiring when replacing the sensor. The sensor cable includes an integral preamplifier cap with mating connector and is compatible with most Rosemount Analytical analyzers and transmitters. Teflon® is a registered trademark of DuPont Films. * May be protected by U.S. Patent No. 5,152,882, Foreign Patent Pending. **May be protected by U.S. Patent No. 6,054,031, Foreign Patent Pending.