Accelerometer SX41800 series0 pages

Aerospace
Energy
Measurement
Railway

Sensorex®

High performance digital & analogue servoaccelerometer
SX41800
Characteristics
 Analog output (±5V) &
digital output (RS485)
 Specially designed for
severe environments
(shocks, vibrations,
electromagnetic
perturbations)
 Very long term stability
 Out standing performances
 Conform to European
Standard of Electromagnetic
Compatibility
 Oil damped servo
mechanism
 Autotest function

Meggitt (Sensorex) SX41800 is a high performance digital RS485 (MODBUS) servoaccelerometer designed to deliver an output proportional to acceleration.
The incorporation of an optical infrared sensor and an inertial mass with servo feedback, as well
as optical position measurement and friction-free mounting, gives the SX41800 outstanding
accuracy, long term stability and high reliability.
Unit can directly interface with any standard PC, with fully user-selectable acquisition and set-up
parameters. Analog voltage output is also available. Moreover, an integrated auto-test function
enables checks of servo loop and associated functions. Also, the damped servo mechanism being
fully oil immersed, this device offers high resistance to shocks and vibrations.
Meggitt (Sensorex) SX41800 is also CE EN 50155 railway norm & CE EN 61326 norm
qualified.
Principle:
A galvanometer located within the core of this sensor is sensitive to the effects of gravity. While
subjected to acceleration, the inertial mass, mounted on a coil, tends to move with respect to the
sensitive axis. This movement is then measured by an optical detector and converted into a
current. The current brings the inertial mass back to its original position. By measuring the
required current for maintaining pendulum stability, the servo-accelerometer produces an output that
is proportional to the applied acceleration.

Meggitt Sensing Systems
Our measurement product competencies:
LVDTs | Inertial systems | Inclinometers | Accelerometers | IMU |
MEMS sensors | Servo-inclinometer | Conditioners

Applications
 Linear acceleration/
deceleration measurements
 Automatic train position
control (ATC, ATP,
ERTMS)
 Low frequency vibration
measurements (seismic
monitoring)
 Structure and buildin