Sensors Beyond the Vehicle

The vehicle reports itself. Everything attached to it needs its own arrangement, and each one is a device with a battery and a failure mode.

Trailers and towed units

Position, so a trailer parked at a customer site for three weeks is visible.

Utilisation, which for trailers is usually worse than for the vehicles pulling them — they are cheap to own and easy to forget.

Coupling status, which tells you which trailer is with which unit.

Tyre pressure and brake wear on instrumented units.

Trailers are the most commonly under-managed asset in mixed fleets and the cheapest place to find utilisation savings.

Plant and attachments

Engine hours, which is how plant maintenance is specified.

Which for a generator or a compressor that runs while the vehicle is stationary is the only usage measure that means anything.

And theft exposure, since attachments are portable and valuable.

Load sensors

Axle weight, on vehicles that report it, which is a compliance matter as well as a cost one.

Overloading is an offence and a maintenance accelerator, and a vehicle repeatedly near its limit wears differently.

Door and cargo sensors, covered under theft, which also tell you dwell at a delivery without any location analysis.

The maintenance burden nobody budgets

Every additional sensor has a battery, a mounting, and a failure mode.

A trailer tracker with a flat battery reports nothing, which looks identical to a trailer not moving.

Which means the device register grows and the quarterly check grows with it.

Budget the replacement cycle: these devices last a few years and fail quietly.

Deciding what to instrument

What decision would this inform?

Trailer utilisation: a disposal or redistribution decision. Worth it.

Plant hours: a maintenance schedule. Worth it.

Every pallet and tool: usually not, and a cargo sensor on the door answers most of the question for a fraction of the effort.

The measure

Devices reporting against devices registered, which for attachments is where the drift concentrates.

Trailer and plant utilisation, which is usually the finding.

And battery replacements, tracked, because an unmanaged sensor estate becomes invisible within two years.

Budget the battery replacement cycle

The running cost of an instrumented estate.

Every trailer tracker and asset tag has a battery that lasts a few years and fails quietly.

An unmanaged sensor estate becomes invisible within two years — devices reporting nothing, indistinguishable from assets not moving.

Put replacement on a schedule and track it as a line, because it is one.

A practical configuration prompt

During configuration, use the agency workflow page to prompt questions about identifiers, ownership and output. Treat the page as a starting point and document each assumption.