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SEN-421 and 422 Extrusion Melt Pressure Transmitter
Melt Pressure & Temperature Transmitters for Extrusion, Fiber Spinning, Food Processing, Polymer Plants, Chemical Processing, Pharmaceuticals, Plastics

S-O-S technology does not require high-temperature isolation of the sensing diaphragm, thereby eliminating the need for mercury, NaK Fill or push rods. The sapphire diaphragm is fifty times harder than stainless steel, making it virtually impervious to wear due to abrasion. In addition, the SEN-421 and SEN-422 are Factory Mutual approved, non-mercury filled melt pressure transmitters.

The SEN-421 Pressure Transmitter features an advanced 2-Wire, 4-20mA amplifier which accommodates a wide range of supply voltages. For ease of calibration, there is minimal interaction between the amplifier's zero and span adjustments. The system also features lead reversal and short circuit protection.

The SEN-422 Pressure/Temperature Transmitter incorporates a silicon RTD on the sapphire force-collection diaphragm located at the tip of the transducer. This RTD/Sapphire diaphragm is thermally isolated from the mounting wells. The result is a reliable transmitter that measures surface media temperature and pressure, while maintaining its accuracy over long periods of time. Moreover, it does not protrude into the melt stream and disrupt laminar flow.

A combination pressure and temperature transmitter provides reliable measurement and control of the most important measurable process parameters thus enabling users to increase production rates, perform diagnostic tests and to protect equipment and personnel.

See Specification Data Sheet