Cardinal Scale Manufacturing's Guardian hydraulic truck scale is a legal-for-trade, severe-duty-rated truck scale that is resistant to water, lightning, power surges and corrosion. The SST model has all stainless-steel hydraulic load cells. No power is required within the scale itself. The control box converts the pressure signal from the hydraulic load cell to a standard electronic signal. Cardinal Scale also manufactures the model 788 weight indicator display which may be programmed to meet specific operational requirements. Cardinal Scale Manufacturing