Digital Level Controller is a new generation smart digital instrument with HART Communication. This high-performance instrument is easily set-up and calibrated. Its mechanical part operates according to the fully proven liquid displacement ("float") and torque tube principles. Contactless Hall sensor and embedded microcontroller convert the torque tube stem rotation into analog signal with high accuracy. The instrument can be set-up, calibrated and tested in situ by use of either a control system or a handheld communicator or local push-buttons with a digital display. The instrument can be adapted to the existing "float" columns upon request. Application: