The TotaLite system is a purely image-based sensor used for static displacement monitoring of monitoring targets (prisms). The TotaLite emits (invisible) IR light and captures images of the reflections of the targets. With digital image correlation (DIC) techniques sub-pixel movements are identified and converted into displacements using the 'slope distance' (sensor-target distance) for scale. Also, it auto-correct for potential movements of the sensor itself using an onboard accelerometer and fixed reference points. Lastly, TotaLite contains a 'Shield' which is a cover and wiper system opening and cleaning after each measurement keeping its lens tidy & clean in harsh conditions.

Using these tricks TotaLite has succeeded in designing a robust and simple monitoring system that can detect target up to 100 meters and deliver precision within 1 mm. uses diffractive optics to ensure the required accuracy and long-term stability minimising temperature effects and environmental conditions.