Unmanned Weighbridge
A vehicle weighs in and out with no operator on site — RFID/ANPR identification, automated barrier control, and a tamper-evident digital ticket.
01Overview
An unmanned weighbridge automates the sequence a manual operator otherwise runs by hand: identify the vehicle, capture a stable weight, log the transaction, and control site access — without needing staff present around the clock. Built from the same weighbridge deck and load cells as a manned site, plus an automation layer, so it isn't a different class of hardware, just a different operating model on top of it. Sites move to unmanned operation for one of two reasons, usually both: the volume of vehicles makes a human operator a bottleneck during peak hours, or the site needs to keep weighing outside normal staffed hours — a mandi during harvest season, a quarry running a night shift, a recycling yard accepting deliveries around the clock.
02How it works
- 01Vehicle approaches — an RFID tag or ANPR camera identifies it automatically against the authorized vehicle list, replacing the manual gate-log entry a staffed site relies on
- 02A motion/position sensor confirms the vehicle is stationary and correctly positioned on the deck before a reading is accepted — the same check a trained operator makes by eye, done automatically so a partial-deck or in-motion reading never gets recorded as a real weighment
- 03The indicator captures a stable weight and generates a digital ticket — sequential numbering, tamper-evident, no manual entry, so there's no point in the process where a number can be quietly typed in wrong or changed after the fact
- 04The boom barrier opens automatically for an authorized, completed weighment; stays shut for unrecognized vehicles or an incomplete weighment, which is what actually enforces the process rather than just recommending it
- 05A traffic light signals the driver when it's safe to proceed onto or off the deck, so a driver unfamiliar with the site still gets a clear, unambiguous instruction with no operator present to give one verbally
03Problems it solves
Staffing a gate around the clock
A manned weighbridge needs a trained operator present every hour it's open — including nights, holidays, and whatever hours the business actually needs to receive vehicles. Automation removes that constraint entirely rather than just making one operator faster.
Queue times during peak hours
A single operator working the ticket line during a harvest rush or a busy dispatch window is a hard ceiling on how many vehicles a site can process per hour. An automated in/out cycle removes the human as the bottleneck step.
Disputed weighments
A verbal disagreement between a driver and an operator over a reading has no record to settle it. A sequential, tamper-evident digital ticket tied to a specific vehicle and timestamp gives both sides the same number to look at.
Reconciling a paper log at month-end
Hand-written or loosely-kept transaction logs are slow to reconcile against billing and easy to get wrong. A digital ticket sequence with no gaps is what actually makes automated reconciliation possible instead of a manual re-count.
04Why it matters
The economics of an unmanned weighbridge come from removing a fixed labor cost that scales with operating hours, not from the automation being flashy. A site running two shifts with a manned gate is paying for two operators; the same site unmanned pays for the automation hardware once and runs both shifts on it. The trust side matters just as much — a tamper-evident digital ticket with sequential numbering is a much harder thing to dispute or falsify than a handwritten slip, which matters directly to revenue accuracy on a per-transaction billing model and to a driver's confidence that the number they're shown is the number that gets billed.
05Products in this solution
Modular Weighbridge
Mild-steel modular weighbridge for road vehicle weighing, shipped in bolted modules for fast on-site assembly.
Pitless (Above Ground) Weighbridge
Above-ground weighbridge for sites where civil pit excavation isn't practical — lower construction cost, easy maintenance access.
RFID Vehicle Identification
RFID tag-based vehicle identification for unmanned weighbridge access control — HF or UHF read range options.
Boom Barrier
Automated vehicle boom barrier for unmanned/gated weighbridge sites — opens on authorized weighment, stays shut otherwise.
Traffic Light
Vehicle traffic signal for weighbridge lane control — red/green sequencing tied to the weighment cycle.
Motion Sensor
Vehicle positioning/motion sensor — confirms the vehicle is stationary and correctly positioned before a weighment is accepted.
Weighbridge Ticket Printers
Weighbridge ticket printers — thermal or impact dot-matrix, for legally-admissible weigh tickets with sequential numbering.
06Common in
07Frequently asked
Does an unmanned weighbridge still need Legal Metrology stamping?
Yes — automation changes who operates the equipment, not the trade-verification requirement. The deck and indicator still need the same stamping and calibration a manned weighbridge does, since the equipment is still being used for a commercial transaction.
What happens if a vehicle isn't recognized by RFID or ANPR?
The barrier stays shut and the system routes to a fallback — typically a QR-code scan, a remote intercom to staff, or a manual override logged with a reason code. Unmanned doesn't mean unsupervised; it means routine transactions don't need a person present.
Can we run unmanned during the day and staffed at night, or vice versa?
Yes — the automation layer (RFID/ANPR, motion sensor, barrier, traffic light) can sit alongside a manned operator station and the site can switch modes by shift, which is common for sites easing into unmanned operation.
What stops someone gaming an unmanned system?
The motion/position sensor rejects in-motion or partial-deck readings before they're recorded, and the sequential tamper-evident ticketing means a transaction can't be quietly altered after the fact — the fraud surface an unstaffed gate seems to open is largely closed by those two checks.
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