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Description
Michigan Scientific's FO-DM is an EMI hardened Fiber-Optic Displacement Transmitter that provides a means to transmit position measurements via fiber-optic cables, from sources in high electromagnetic fields (or anechoic chambers) to monitoring equipment in a low field area. Signals sent over optical fiber are immune to interference or signal impairment that may be seen with wire cable. Major benefits provided are small size in a self-powered transmitter having electromagnetic immunity and extended battery life.
The displacement sensing transducer uses a potentiometric voltage divider circuit, which measures linear position via a flexible displacement cable that extracts from and retracts to a spring-loaded drum. Total length of the cable is 32'' providing ±16 inches of travel that is equal to ±16 Volts output, or a scaling factor of 1 V/in. Receivers are available in 2, 4 or 12-channel bench-top and 12-channel rack-mount configurations.
The FO-DM transmitter is EMI hardened and validated for EMC operation in harsh RF environments at power levels up to 200 V/m (46 dBV/m) from 500 kHz to 2 GHz. The displacement transmitter uses 820 nm wavelength multimode 62.5/125 µm, 100/140 µm or step-index 200 µm HCS fiber cables. SMA type 905 connectors are standard.