The EZ Dig Pro for excavators and backhoes provides precise grade control for digging a fixed depth or a slope, without the need for a person in the excavation to check depth. Three solar-powered, magnet-mounted sensors take into account the movement and angle of the bucket, boom and dipper stick to give continuous depth control indication (transmitted via wireless RF communication) on the in-cab display. The one-person system can be installed and calibrated by any operator in 45 minutes or less. It can also be calibrated to several machines, and retains the data as it is moved between equipment.