The Syscal Terra Switch is the new generation of resistivity & IP surveying system. It mixes recent electronics advances with the standards of resistivitymeters designed by IRIS Instruments for more than 30 years such as robustness, compactness, light weight and large temperature range (-20 °C to +70 °C). The transmitter part has been redisigned for a better cooling and improved performed in hot context. While the receiver part has been completely redisgned to offer an outstanding accuracy together with 20 channels making this system the most efficient of the market. Although completely redesign, the Syscal Terra transmitter specifications are unchaged (250 W, 2000 Vpp) to keep the compatibility with your existing cables and Switch Pro unit (10 channels only). It allows to perform a large type of acquisition (SP, resistivity, IP for sounding, profiling, 2D, 3D, roll-along and 4D surveys). The color screen allows the user to check the apparent resistivity in real time, to visualize simultaneously the 20 IP decay curves and to make it easier the quality control after acquisition. The touchable screen improves the experience of navigation through the menus, allowing also to type directly the filename on a virtual keyboard.