Released on: September 5, 2008, 2:54 pm

Press Release Author: Macro Sensors

Industry: Electronics

Press Release Summary: Macro Sensors (www.macrosensors.com), specialists in the
manufacture of LVDT-based linear position sensors, custom designs High-Pressure and
Seawater Resistant LVDT Position Sensors for incorporation into sub-sea measurement
systems used to monitor structural movement for long-term Finite Element Analysis of
offshore platforms, pipelines, derricks, moorings and other critical high-stress
members on offshore oil platforms.

Press Release Body: The High-Pressure and Seawater Resistant LVDT Position Sensors
can also be used to measure the position of the valves, called chokes, on sub-sea
oil well control towers (called Christmas trees), located at the wellhead, as well
as controlling or measuring position of robotic arms and actuators.

As seawater applications often require a design service life of as much as 20 years
while being exposed to seawater pressures up to 7500 psi, Macro Sensors
High-Pressure and Seawater Resistant LVDT Position Sensors are designed from 316SS
and Inconel 625 for pressure and corrosion resistance. These materials enhance the
already high reliability of the LVDT assembly, ensuring it will continue to operate
for minimum life requirements, even if the device is fully exposed to seawater.

Macro Sensors High-Pressure and Seawater Resistant LVDT Position Sensors also
resolve the problem of getting a signal back to the surface for monitoring,
recording and/or controlling some physical action taking place on the surface or sea
water, even in great water depths. To minimize the number of pressure-sealed
connections and I/Os, a 4-20mA two-wire, loop-powered I/O can be utilized, which is
then, converted to a RS485 signal for transmission to the surface. Typically, a
digital converter is contained in a high-pressure sealed bottle located nearby. A
4-20mA I/O also minimizes any noise over long transmission lines. Offsets can be
easily made in the data acquisition system on the platform above.

A paramount requirement of many sub-sea applications is excellent repeatability and
resolution. Macro Sensors High-Pressure and Seawater Resistant LVDT Position
Sensors offer extraordinary repeatability and resolution, regardless of offsets due
to pressure and/or temperature. Another key element of the LVDT design is zero
leakage pressure sealing, often verified by helium mass spectrometer leak testing.
For more information on High Pressure and Seawater Resistant LVDT Position Sensors
from Macro Sensors, please contact the factory at sales@macrosensors.com.

About Macro Sensors
Macro Sensors’ extensive line of LVDT-based linear and rotary sensors are used for
linear position measurement and feedback in a variety of industrial applications
including factory automation, motion control systems, metal fabricating, automotive
assembly as well as power plants, gas/steam turbines. Incorporated in 1994, the
Company offers more than 200 years of cumulative design and manufacturing experience
by its key staff in serving its OEM and end-user international customer base. On
June 1, 2005, Macro Sensors was acquired by AST, manufacturer of state-of-the-art
Micro-Electro- Mechanical- Structures (MEMS) based pressure sensors, transducers,
and transmitters. Common applications of AST sensor products are in industrial
OEM, hydraulic systems, fuel cells, medical gases, HVAC/R, refrigeration, oil & gas
exploration/production, and off-road vehicles. For more information on AST products
and technology, visit the AST website at www.astsensors.com.



Web Site: http://www.macrosensors.com

Contact Details: U.S. Route 130 North, Bldg. 22, Pennsauken, NJ 08110-1541
Tel: 856-662-8000 Fax: 856-317-1005