Datasheet

MPX2300DT1
Sensors
2 Freescale Semiconductor, Inc.
Pressure
The MPX2300DT1/MPX2301DT1 Pressure Sensors have
been designed for medical usage by combining the
performance of Freescale's shear stress pressure sensor
design and the use of biomedically approved materials.
Materials with a proven history in medical situations have
been chosen to provide a sensor that can be used with
confidence in applications, such as invasive blood pressure
monitoring. It can be sterilized using ethylene oxide. The
portions of the pressure sensor that are required to be
biomedically approved are the rigid housing and the gel
coating.
The rigid housing is molded from a white, medical grade
polysulfone that has passed extensive biological testing
including: 10993-5:1999, 10993-10:2002, and 10993-
11:1993.
A silicone dielectric gel covers the silicon piezoresistive
sensing element. The gel is a nontoxic, nonallergenic
elastomer system which meets all USP XX Biological Testing
Class V requirements. The properties of the gel allow it to
transmit pressure uniformly to the diaphragm surface, while
isolating the internal electrical connections from the corrosive
effects of fluids, such as saline solution. The gel provides
electrical isolation sufficient to withstand defibrillation testing,
as specified in the proposed Association for the
Advancement of Medical Instrumentation (AAMI) Standard
for blood pressure transducers. A biomedically approved
opaque filler in the gel prevents bright operating room lights
from affecting the performance of the sensor. The
MPX2301DT1 is a reduced gel option.