The PRECISE APEX LOCATOR Smart PAL is the latest generation of apical constriction locators, representing an entirely new approach to endodontic measurements. The novelty of precise measurement method is protected by UK patent No. GB 2431358 which contains dual frequencies and automatic measuring error eliminating system. Applying the newest IT technology the working length of the root canal can be measured with 0,1mm accuracy, presenting a visual positioning of the endodontic file on display (of smart phone/tablet/computer) in the cross-sectional view of the root canal which contains the marks for both apex physiological and apex anatomical. The tool works equally well in wet or dry root canals and reveals any cracks or perforations in the dental root. The unit allows measuring the apical constriction very precisely and quickly, without using radiography. Innovation: To meet consumer needs and options the universal unit is designed for operation with: