Profile: Industrial Interface Ltd. specializes in the design, manufacture and supply of innovative signal conditioning, isolation, conversion and control equipment. Our product line includes loop isolators, in-head isolators, isolating signal converters, trip amplifiers, and smart signal converters. Our 420i series of loop powered isolators are direct current isolators. The isolator derives its power from the 4-20 mA input signal, and therefore requires no external power supply. The output of the isolator can be connected to any potential within 1 kV of the input negative terminal, while transients of 2.5 kV can be withstood. An option exists to increase the isolation to 2 kV. Two variants are available which can provide a 1-5V or a 0-10V output. Our Strain® unit is a universal strain gauge transmitter. It will interface to the majority of strain gauges, load cells, and pressure transducers. The unit provides a high stability excitation voltage which is isolated from both the high level output and the power supply. Front panel mounted trim pots allow adjustment of zero and span settings, and output monitoring terminals allow the output to be measured without breaking the instrument loop. The Strain® can be supplied in either AC or DC powered versions.