RDP Develops Signal Amplifiers for LVDTs

A range of low-profile DIN-rail-mounted amplifiers from RDP Electronics have been designed to provide excitation and signal amplification for LVDTs and a wide range of other inductive transducers. The DR7DC strain-gauge amplifier is compatible with most full-bridge strain-gauge transducers. System engineering and earth loop problems are reduced thanks to full isolation between the DC supply side (9V to 36V) and the amplified output with low noise levels.

Offering transducer excitation options of 1V or 3V RMS, at either 3kHz or 5kHz carrier signal excitation, there is a choice of a full range output of either +/-10V or 4-20mA from switched selectable input signal levels ranging from 20mV to 4V RMS. The DR7AC and DR7DC amplifiers offer thermal stability, with a dynamic response that is flat from static to 250Hz. Both models can operate from a wide range of supplies that includes batteries, road vehicle supplies and the usual factory 24V supply. Both the DR7AC and the DR7DC are packaged for DIN rail mounting.

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