Fairmont Marketing is now the official Australian distributor of USA based NVE Corporation IsoLoop Digital Isolators which are the ideal alternative to optocouplers. www.nve.com/Isolators.php NVE’s award-winning family of galvanically-isolated interface products is based on patented spintronic GMR technology. This technology provides unprecedented small size, high speed, low pulse width distortion, high common mode rejection, high isolation, working, and surge voltages, excellent magnetic immunity, best-in-class EMC, and unlimited life with no degradation.