Domestic gas flow measured accurately by ultrasound A small gas meter uses ultrasound to measure the flow rate of gas. It is also capable of recognising internal faults and external interference. A new company has been formed to make the instrument.

Flux vector controllers drive into pole position The development of flux vector ac drives has challenged the role once held by their dc counterparts. To see why, designers must examine the technology behind the drive.

Micromachines show it is a small world after all Micromachining borrows techniques from semiconductor device fabrication technology and applies them to the manufacture of mechanical parts. Design engineers have taken advantage of the technology to build a variety of microminiature devices.