How a weighbridge works: weigh tickets, verification and integration

A weighbridge (Indonesian: jembatan timbang) is a large platform scale that weighs a whole truck at once: the loaded vehicle gives the gross weight, the empty vehicle gives the tare weight, and the difference is the net weight of the cargo printed on the weigh ticket.

The idea is simple, and the detail is where trust is won or lost. Every weighbridge system answers the same questions: which vehicle is on the deck, for which order, how heavy is it, who saw it, and where does the number go afterwards. This guide follows that path from the load cell to the ERP, then explains how tera ulang keeps the scale legally usable.

At a fuel or LPG depot, the weighbridge sits next to the gate and the loading area. It belongs to the same flow as a terminal automation system, so weighing data and loading data should never live in separate notebooks.

The term points to two different installations, and search results mix them. Knowing which one you mean avoids a lot of confusion.

• The company weighbridge stands at a gate and weighs cargo for sales, receiving, stock or transport billing. It is a weighing instrument used in transactions, so legal metrology applies.
• The roadside weighing station is run by the transport authority to check vehicle load on public roads. Its rules sit in Permenhub 18/2021 on freight load supervision and vehicle weighing on roads, which replaced Permenhub 134/2015.

The hardware is similar: a deck, load cells and an indicator. The purpose, the operator and the legal basis differ. This guide covers the company weighbridge, the one behind the gate of a terminal, depot, palm oil mill or factory.

A weighbridge system is a short chain from steel to software, and each link can introduce error.

The deck is the steel or concrete platform the truck drives onto. Load cells sit under it, usually at the corners and along the sides. A junction box collects their signals, and a weighing indicator, also called a weighing controller, converts the sum into a weight and decides when the value is stable enough to record. Identification, a camera and a barrier gate turn the weight into a transaction. Weighing software ties everything to an order and sends the ticket onward.

Net weight is the difference between two weighings of the same truck. For goods coming into a site the truck is weighed loaded first and empty second. For goods leaving, such as a dispatch, the order is reversed.

Two weighings are needed because the scale cannot see the cargo on its own; it only sees truck plus cargo. Everything that stays with the truck, including fuel in the tank, the driver, spare tyres and tools, cancels out only if it is the same at both weighings. Some sites store the tare of regular vehicles to save a pass, which works until a tank is refilled or a body is changed, so stored tares need an expiry.

A weigh ticket is the record that two parties accept as the weight of a load.

We did not find a single national template for company weighbridges, so the layout is usually set by contract or by the site's procedure. A useful ticket answers who, what, when and how much. It shows the ticket number, date and time of both weighings, the weighbridge, the vehicle number, the order or delivery note, the material, gross, tare and net weight with the unit, and the user who handled it. A reprint should say so on its face.

Most weighbridge disputes come from the process around the scale, not from a bad load cell.

The table lists the usual ways a weighing goes wrong and the control that closes each gap. None of the controls replaces the others, and a camera without a rule only records the problem.

Weighbridge software connects a number on a display to a business transaction.

Its core jobs are identifying the vehicle, reading the indicator, pairing weigh-in with weigh-out, validating the result against the order, keeping photographic evidence and printing the ticket. Larger sites run several weighbridges from one screen. The result then goes to the ERP or TAS: order number, vehicle, gross, tare, net, time stamps and ticket number. Posting per transaction avoids the end-of-shift typing that hides errors.

INTEGRA Weighing is Citia's product for this chain; its page lists RFID or barcode identification, cameras, barrier gates, validation and tickets, and links to TAS, SAP or another ERP. When no operator sits at the weighbridge, the same chain runs with stricter controls, covered in unmanned weighbridges and ERP integration. See also INTEGRA Weighing and INTEGRA Access for the gate side.