offers the new Endevco SX 41800 digital servo accelerometers in four ranges from ±0.1 to ±1.0 g.
The main output signal, RS485 (MODBUS) allows direct connection to a standard PC with all setting-up and data acquisition controlled by the user. An analogue ±5V output signal is also available via one of the output pins.
Endevco SX 41800 accelerometers are specifically designed for applications where linear acceleration and deceleration are to be measured in addition to monitoring of automatic train position control (ATC, ATP, and ERTMS), low frequency vibration measurement, seismic activity measurement, aircraft characteristics, and structural monitoring.
Based on the galvanometer principle, the Endevco SX 41800 accelerometer incorporates an inertial mass mounted on a coil, which tends to move with respect to the housing of the accelerometer when the accelerometer is subjected to motion. The movement of the coil is detected optically and transduced into an electrical signal, which excites the coil to return the inertial mass to its null position.
The excitation current required to maintain the inertial mass in its null position is in direct proportion to the applied acceleration or deceleration and is therefore the source of the output signal.
Endevco SX 41800 digital servo accelerometers can withstand high shock and vibration because the mechanism is suspended in an oil bath that also provides the essential dampening factor.
The servo feedback, optical position sensing and friction-free suspension of the inertial mass together enable the Endevco SX 41800 to measure with excellent precision as well as provide long term stability and reliability in demanding applications. An integrated auto-test function allows the user to check the servo loop and most of the other associated functions.