If your goal is simply to maintain legal axle weights than many times choosing between analog and digital is just a matter of personal preference. Our analog gauges are super simple and work great for drivers with air suspension who just need to maintain legal axle group weights and avoid overweight fines. A digital gauge is required if the vehicle does not have air suspension, is used for heavy haul applications, or if lift axles are involved. Our digital gauges use two-point calibration, once while empty and once while loaded, making them more accurate for partial loads. Exterior digital models also work for axle groups with multiple configurations, such as groups with integrated lift axles, come standard with Bluetooth connectivity, and can be purchased optionally with RS-232 output for use with telematics systems.