Verify axle and gross vehicle weight in the cab before the truck leaves the yard. Avoid overload fines, optimise payload, build a compliance audit trail. Designed and supported in the UK by Air-Weigh.
An on-board weighing system reads weight straight off the vehicle's own suspension. Sensors mounted to the air bags or mechanical suspension components measure the load on each axle, and the in-cab display turns those readings into a live total gross vehicle weight and a per-axle breakdown. The driver can see, at the loading site, whether the truck is within its legal limits before pulling out of the yard.
That changes three things about how a fleet runs. Drivers stop guessing about load weight. Operators stop discovering an overload at the roadside. And every loaded run leaves a calibrated reading and a timestamp, building an audit trail that a transport manager can refer back to weeks later when a question arises.
Pick the system that fits the vehicle type and configuration. All three use the same in-cab display style and the same UK service network.
Our standard system for rigid HGVs and refuse, mixer, and tipper trucks. Reads each axle independently, displays total GVW in the cab, and warns the driver if any axle is approaching its legal limit before a movement begins.
iWeigh Truck details →Reads the tractor unit and the trailer separately, then combines them in the cab display. Built for articulated and long-haul fleets where trailers swap between units and where cross-border axle limits change at the border.
iWeigh for Tractor-Trailers →The lighter-touch system for smaller fleets and seasonal use. Faster to install, simpler to operate, designed for vehicles below 18 tonnes where the operator wants in-cab weight verification without a full retrofit.
QuickWeigh details →Different vehicles load differently and have different compliance pressures. Each of these pages covers what an on-board system needs to do for that specific kind of fleet.
Quarry and aggregate fleets. In-cab verification at the loading site.
Long-haul artic fleets, cross-border weight compliance.
Municipal RCV fleets, route weight monitoring, council procurement.
Concrete drum weighing and batch verification before leaving the plant.
Bulk liquid and gas, partial-fill weighing across multi-drop routes.
Field-side weight knowledge before the trailer leaves the farm.
Watch a driver use the iWeigh display from loading to roadside check.
UK HGV weight enforcement is run by the DVSA. The maximum gross weight, the per-axle limits, and the graduated fixed-penalty bands are set out in published regulations. On-board weighing is the operator's tool for verifying that a truck is within those limits before it begins a movement, and for evidencing that verification when an officer asks.
GVW and axle limits by configuration, abnormal-load rules, and the DVSA roadside enforcement corridors.
Read the UK reference →The headline graduated penalty plus the four costs nobody quotes (downtime, insurance, court, O-licence repute).
See the cost breakdown →Air-Weigh systems retrofit to existing HGVs and trailers. Sensors mount to the suspension components already on the vehicle (air-bag transducers for air suspension, load cells for mechanical). The cab display fits in the standard DIN slot on most HGV cabs. Most fleets are up and running on a vehicle inside half a day.
Typical accuracy is plus or minus 2 to 3 percent on calibration day. That is more than enough for fleet compliance: avoiding overload-running, building a defensible audit trail, and keeping payload optimised. Air-Weigh systems are designed for operational fleet weighing, not for trade-certified weighing of goods by weight. Read the full accuracy explainer →
A trained fitter mounts the sensors on the suspension, runs cabling to the cab, and installs the in-cab display. The fitter then calibrates the system against a known weight so the readings are accurate from day one. Most retrofits take half a day per vehicle.
Air-Weigh provides UK-based phone support, recalibration service, and replacement-part fulfilment from UK stock. Recalibration is recommended on a defined cadence and after any suspension or sensor work. Calibration certificates are issued for each service so you can keep an audit trail.
Tell us how many vehicles you run, what they look like, and where they load. We will come back with a fit assessment and a recommended product within two working days.
Get a fleet-fit assessment