Sokkia SRX Fully Robotic, Auto-tracking Total Station with Bluetooth Technology, Red-tech EX The SRX from Sokkia is a fully-robotic, fully-tracking and auto-pointing robotic total station, with on-demand target reacquisition. Sokkia\'s fully-tracking SRX uses the latest robotic technology. Sokkia\'s patented RED-tech EX technology offers the highest precision on all ranges of measurements. Sokkia\'s flagship Total Station has the latest technology on-board to make single-operator measuring quick,