What does a checkweigher conveyor do and when do I need one?

A checkweigher conveyor weighs every package in motion as it passes over the scale section and automatically rejects any unit that falls outside the target weight range. You need one whenever package weight matters for quality, regulation, or pricing - which covers most food, beverage, pharma, FMCG, and logistics lines. Manual weight checking is too slow for line speed and misses the units between samples; the checkweigher checks every single package without slowing the line. The reject unit diverts non-conforming items off the conveyor without stopping production, so the line keeps running at full rated speed.

How does the reject unit work, and what types are available?

When the scale section flags a package as over or under target weight, the PLC fires the reject unit at the right moment based on a delay timer matched to your belt speed. SANAM supports several reject types: pusher arm (the standard mechanical solution for boxes and bags), air blast (a compressed-air jet for small light items), flipper arm (for fragile products that should not be pushed), and retracting conveyor (the entire reject section drops away briefly for drop-off rejection). We specify the right one based on product weight, size, fragility, and downstream layout.

Belt scale vs roller scale — which configuration should I choose?

Two configurations. Belt scale conveyor uses a smooth continuous belt over the load cell - best for small, light, individual packaged products (sachets, pouches, bottles, jars, small cartons). Roller scale conveyor uses powered rollers above the load cell - best for larger boxes, cartons, cases, and heavier units (5-60 kg) that need a roller surface to handle the load and travel evenly. If the product is small and packaged, choose belt. If the product is a box or carton, choose roller. SANAM helps you pick based on the actual product and line speed during the engineering consultation.

What accuracy can I expect at line speed?

Accuracy is inversely proportional to speed - the faster the belt runs, the less time the load cell has to settle on each reading. Typical SANAM checkweigher accuracy ranges from 0.5 grams for small high-precision applications at moderate speed, to 20 grams for industrial-rated lines at high throughput (up to 100+ packages per minute). The load cell is sized to your largest package, the scale section length is set to give the cell enough settling time at your target line speed, and the PLC averages multiple readings to reduce noise. We size the cell and scale section to the accuracy your operation actually needs - over-specifying drives cost without improving line outcomes.

How does it integrate with my existing PLC and line?

The PLC touch screen is the standard control interface - operators enter target weight, upper and lower tolerance, and reject criteria directly on the screen. The PLC also exposes digital outputs for line integration: accept/reject signals, weight data logging, fault alarms, and SCADA/MES interface for plants running enterprise data systems. SANAM engineers the electrical interface to your upstream and downstream equipment - filler, packer, labeler, or sorter - so the checkweigher participates in your line as a synchronized cell, not a standalone box. Allen Bradley, Siemens, and Mitsubishi PLC platforms are all supported.

Material Handling Conveyor

Checkweigher
Conveyor

The conveyor that catches what shouldn't ship — a checkweigher conveyor that weighs every package in motion as it passes over the scale section, then automatically rejects any unit that falls outside your target weight range. PLC touch screen for entering target values and tolerances. Automated reject unit — pusher, air blast, flipper, or retracting conveyor — diverts non-conforming items without stopping the line. Available in belt-scale for small packaged products and roller-scale for boxes and cartons. Stainless steel hygienic construction for food, pharma, beverage, and FMCG lines.

Code CWC

Accuracy 0.5 - 20 grams

Built Egypt — 10th of Ramadan

Real-Time Weight Verification Automated Reject Unit PLC Touch Screen Control

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SANAM checkweigher conveyor — in-motion weight verification conveyor with automated reject unit and PLC touch screen for food, pharma, beverage, and FMCG lines installation in Egypt

CWC · Checkweigher Conveyor

Key Features

What Makes a SANAM
Checkweigher Conveyor
Different

Six things that set a SANAM-built checkweigher conveyor apart from a generic imported solution — every one of them a decision we make at the engineering desk before fabrication begins.

Real-Time Weight Verification

The defining feature — every package gets weighed as it passes over the scale section, not a sample, not a periodic check. The load cell reads weight in motion, the PLC compares against your target, and accept or reject happens automatically within milliseconds. No operator intervention, no production stoppage.

Automated Reject Unit

The reject unit attached to the conveyor diverts over- or under-weight packages off the line without stopping production. SANAM supports four reject mechanisms — pusher arm, air-jet blower, drop-flap, and diverter belt — chosen by package weight, shape, line speed, and rejection rate expected.

PLC Touch Screen Control

The standard specification includes a PLC touch screen for entering target values and changing them at will. Operators enter target weight, upper and lower tolerance bands, reject delay timing, and live changeover settings. No engineer required for routine product or specification changes.

Belt-Scale + Roller-Scale Variants

Two configurations matched to your product. Belt-scale uses a smooth continuous belt over the load cell — best for small, light packaged products: sachets, pouches, jars, bottles, small cartons. Roller-scale uses powered rollers above the load cell — best for cartons, totes, and heavier packages.

Stainless Steel Hygienic Construction

SS 304 is standard for food, beverage, and FMCG washdown environments, with SS 316 available for pharma, dairy, and aggressive chemical processes. Smooth weld finishing, easy-clean geometry, and IP65-rated electricals make every checkweigher washdown-ready from day one.

Custom-Engineered Integration with Your Line

SANAM does not deliver a checkweigher as a standalone box. We engineer the upstream interface — transfer geometry, belt speed match, height alignment — with your filler or packer, and the downstream interface with sorting, palletizing, or QC stations. One integrated weighing station.

Configurations

Two Scale Configurations — Belt or Roller

Both configurations use the same load cell technology and PLC platform. The difference is the conveying surface over the scale — belt for small packaged products, roller for boxes and cartons. Pick based on the product, not the budget.

Belt-Scale Checkweigher

A continuous smooth belt runs over the load cell section. Best for small, light, packaged products — sachets, pouches, jars, bottles, small cartons — where a flat belt surface gives the best contact and stability for accurate weighing in motion. Common in food packaging, pharmaceutical pouching, cosmetics, and FMCG end-of-line operations. Belt width and length are sized to your product, with stainless steel construction standard for washdown environments.

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Roller-Scale Checkweigher

Powered rollers run above the load cell section. Best for boxes, cartons, cases, and heavier units (typically 5-60 kg) that need a roller surface to travel evenly under load without dragging on a belt. Common in case-end-of-line operations, parcel verification at distribution centers, fulfillment shipping verification, and baggage handling at airports and transport terminals. Roller pitch and load cell capacity are sized to your typical package weight and dimensions.

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Industries Served

Where the Checkweigher Conveyor Earns Its Place

Six industries where package weight verification is a quality, regulatory, or pricing requirement — and where a checkweigher catches what manual sampling would miss.

Food Processing & Packaging

Food packaging lines verify every pouch, sachet, bottle, jar, or carton against declared net weight at end of line. Required for regulatory compliance. SS 304 standard; IP65 for washdown.

Pharmaceutical & Healthcare

Pharma plants weigh every blister, bottle, vial, and box — dose accuracy is a patient-safety and regulatory must. SS 316 hygienic construction; validation-ready data logging.

Beverage & Bottling Plants

Fill-weight verification on bottles and cans from high-speed fillers — under-fill rejected, over-fill flagged for filler calibration. Belt or roller scale matched to package profile.

FMCG & Personal Care

Household products, cleaners, shampoos, cosmetics — every bottle, jar, or carton verified for declared net weight. Retail customers require certified weight compliance.

Logistics & Distribution Centers

Parcel verification at distribution centers, e-commerce fulfillment, and 3PL warehouses — every outbound shipment weighed to match manifest. Catches mispicks and label fraud.

Baggage Handling — Airports & Transport

Airport baggage check-in, train luggage, and bus terminal operations needing in-motion weight verification of suitcases before loading. Heavy-duty rollers for repeated impact.

Why SANAM

The Conveyor Is Half
the Story. The Team Behind It
Is the Other Half.

Anyone can sell you a conveyor. The question is who picks up the phone six months later when a chain segment fails on a Sunday night.

Egyptian OEM, Not Importer

The conveyor is designed, fabricated, and assembled in our 10th of Ramadan facility — by the same team that installs and supports it. No middleman, no resold equipment, no relabeled imports.

Custom-Engineered to Your Line

We design around your factory floor, your existing fillers and packers, and your container specs. We don't sell standard parts hoping they fit — we design for your line.

Spare Parts in Egypt, in 48 Hours

Spares are typically available within 48 hours from our Egyptian inventory — no import waits, no customs delays, no production downtime while you wait for a chain segment from Europe.

Full System Integration

We don't just supply a conveyor. We connect it to your existing line — matching speed, height, and transfer geometry to your fillers, cappers, labelers, and packers. The line becomes one system, not a stack of disconnected machines.

Get a Quote

Tell Us About
Your Line.

Send us your container type, throughput target, and a sketch or photo of your factory layout if you have one. A SANAM engineer responds within one working day with a scoped technical proposal — no salesperson handoff.

Request QuotationPricing for your specific line

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What Happens Next

We review your request within one working day.
An engineer calls you to scope your line and answer questions.
You receive a written proposal with technical details and a budgetary figure.

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Checkweigher
Conveyor