The SVC55 sensor board conditions the signal from the ultraviolet intensity sensor and presents it to the controller. It sits between the sensor and the control system, so a fault here reads exactly like a failed sensor — worth eliminating before a sensor is replaced on a reactor of this value. Wedeco designates the board SVC55; the designation is carried exactly as the manufacturer states it. Wedeco was founded in Herford, Germany in 1976 and is now a Xylem brand.