No verdict attached
A gauge reads 35,140 lb on the drives. Whether that is a problem depends on the axle spacing, on every consecutive group the bridge formula covers, on the tire rating, and on which state the truck is in when it is read.
Head to head
An onboard scale reads the real quantity rather than a proxy for it, and for some operations it is the instrument the whole day runs on. It cannot weigh a load that does not exist yet.
Who it is for
If the difference between a profitable load and a citation is the last two thousand pounds, a gauge on the vehicle is not a nice extra.
Air-pressure systems read the suspension bags and convert that pressure into a load, which is cheap, robust and works beautifully on air-ride equipment. Some of the analog gauges need no electrical power at all — you look at them. Load-cell systems measure force directly and work where there is no air bag to read, which covers mechanical suspensions and hard vocational service.
Both give a genuine axle reading on the vehicle, in front of the person loading it. In refuse, bulk and aggregate work, where the truck is weighed on every pick-up, that reading is the operational core of the business rather than a compliance accessory.
We do not make hardware and cannot create a measurement ourselves. AxleGuard can now register a physical gateway, require its signed credential, compare samples with a certified scale ticket and ingest the accepted reading. That first row is therefore part, not yes: the measurement still belongs to the instrument maker.
The number a gauge gives you is the right number. It arrives on the wrong side of the moment when fixing it was free.
The moment the cost changes
The job it was not built for
Three gaps, none of which is a criticism of an instrument doing exactly what an instrument does.
A gauge reads 35,140 lb on the drives. Whether that is a problem depends on the axle spacing, on every consecutive group the bridge formula covers, on the tire rating, and on which state the truck is in when it is read.
Knowing you are over does not tell the yard what to do about it. The useful output is a move — these pallets, that far, or the tandems back four holes — and it comes from a model of where the freight sits.
Freight comes off at stop two and the balance shifts. Diesel burns off the steer axle over four hundred miles. A gauge tells you what is true in the yard, not what will be true at four o'clock.
A worked example. Eight items, 24,740 lb of freight. A gauge reads one number per axle group, honestly and after the fact. The plan that produces the same number knows which of these eight to move, and how far.
The instrument is measuring the sum. The correction lives in the parts, which is why a gauge can tell a yard it is over and cannot tell it what to pick up.
Side by side
Working without power and requiring fitted hardware are the instrument's properties. Reading a commissioned instrument is now an AxleGuard integration, but measuring remains the other column's job.
The whole onboard scales category| Capability | AxleGuard | Onboard scales |
|---|---|---|
| Axle load measured by hardware on the vehicleAxleGuard ingests a commissioned vendor reading; it does not make the scale | part | Yes |
| Reading available with no power on the trailer | No | part |
| Axle weights visible while the freight goes on | Yes | Yes |
| An answer before anything is lifted | Yes | No |
| Axle weights solved from planned cargo position | Yes | No |
| Bridge formula on every consecutive axle group | Yes | n/p |
| Tire and axle-rating limits layered on statute | Yes | n/p |
| Binding rule and jurisdiction named on the verdict | Yes | n/p |
| Corrective move in slider holes and inches | Yes | n/p |
| Verdict recomputed per leg as freight comes off | Yes | No |
| Fuel burn changing the verdict mid-trip | Yes | part |
| Truck-legal route planned for the same load | Yes | No |
| Weight history plotted across the whole run | Yes | n/p |
| Hardware, fitting and calibration required | No | Yes |
Methodology
When to pick them instead
You load to the line on every pick-up. Refuse, bulk, aggregate and vocational work all want a measured number in front of the loader, every time.
You need the reading in the cab with no dependency on software, a network or a plan being entered correctly.
Your freight has no discrete items to model. A pile of gravel does not have pallet positions, and a scale is the honest answer.
You want a physical check that does not care whether anybody kept the equipment record up to date.
If you already have scales, keep them
Working together
Five axle numbers from where the freight will sit, the binding rule on each, and the correction in holes and inches if one of them is over.
The hardware reads the real thing as the freight goes on. If the plan said 33,900 lb on the drives and the gauge says 34,600 lb, stop and find out why now.
A gap between plan and reading usually means the equipment record is wrong — a tare weight, a slider position, an axle spacing. Fix that once and every load after it is better.
Derived replay proves the map and event workflow now. After a truck gateway passes certified-reference and repeatability checks, its physical signals can use the same journey view.
Related
Next step
Bring a load and the axle readings your scales gave you for it. If our plan and your hardware disagree, we would rather find that out on your trailer than tell you we never do.