Displacement

Many displacement and positioning transducers are commercially available that are suitable for use with e-corder. Depending on their specifications, they may connect directly to an e-corder input, or require a bridge amplifier or other signal conditioner.

The Chart recording software can differentiate a position signal with respect to time thus giving measure of velocity. Alternatively the output from a velocity sensor can be integrated to give a position signal.

Listings of many types of displacement and velocity sensors can be found at:

• Direct Industry
• GlobalSpec

Large amplitude motions can be monitored with string potentiometers. See:

• Celesco
• UniMeasure

Very small displacements can be measured with fiber optic systems:

• MTI Instruments

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