528 High Temperature Pressure Transducer

Setra's Model 528 is a high performance pressure transducer and is designed for robust industrial and submersible applications that require high performance in extreme environments.  The 528's CVD strain gauge design is resistance to aging and is virtually insensitive to thermal transients and pressure cycling.  The stability of this technology assures the user of high repeatability with less than 0.2% drift per year.

All wetted parts are constructed of corrosion resistant 17-4 PH stainless steel, which makes this unit ideal for use with corrosive media.  The Model 528 offers 0.1% FS accuracy, compensated temperature range of -20°F to +212°F (-30°C to 100°C), and gauge, absolute, vacuum or compound pressure ranges from -14.7 psi up to 6000 psi. The Model 528’s modular design is offered in a wide range of voltage or current outputs, and a variety of pressure and electrical connections, enabling this unit to be custom configured for your OEM application.

Depending upon the electrical connection selected, when coupled with the Model 528 enclosure, which is fabricated in 316 SS/17-4 PH SS, this unit is rated for IP40, IP65, IP66 or IP68 operation.

Principle of Operation

Using the well proven Wheatstone Bridge principle, a chemical vapor is deposited in thin layers of silicon and silicon dioxide onto a stainless steel sensor to form a very sensitive and accurate polysilicon strain gauge. The
elements of the strain gauge are fused together at the atomic level, assuring the strength and integrity of the bond, which exceeds the adhesives used in common bonded strain gauge pressure sensors. A custom designed ASIC per forms signal amplification and temperature compensation. This technology offers the user the option of configurable output and pressure ranges, sets the zero and span tolerance, and ensures interchangeability from unit to unit.