Precision In-Line Checkweigher for Assembly Lines
An in-line checkweigher that mounts right inside your assembly line: 1-3000g weighing range, ±0.5-2g accuracy — missing or short-packed items are rejected on the spot.
Precision In-Line Checkweigher for Assembly Lines (MQ-CW4530L3) — range 1-3000g, accuracy ±0.5-2g. Factory-direct from Guangdong, China. OEM & custom available.
Typical applications: Color boxes, electronics packaging boxes and other assembly-line products — in-line checkweighing mounted directly within the line
Key Features
- ✓Touch-operated start/stop buttons
- ✓Freely configurable upper and lower weight limits
- ✓Selectable stop-and-weigh or continuous weighing modes; pusher rejection with audible and visual alarms for out-of-spec products
- ✓Intuitive touch interface, multi-recipe storage, password-based access control, weighing records and intelligent fault detection
- ✓Non-standard customization available to customer requirements
- ✓Mounts directly in the middle of an existing line, saving both labor and floor space
Why Choose MQ-CW4530L3
Mounts right in the middle of your line
This machine needs no dedicated checkweighing line of its own. The weighing section is just L450mm×W300mm — standard 2-section, optional 3-section — dropping straight into the middle of your assembly line so products are checked as they flow through. It saves a full-time inspector and the floor space of a standalone station, with virtually no change to your existing line layout.
1g to 3kg covered by one machine
Weighing range 1-3000g, display division 0.1g, weighing accuracy ±0.5-2g. When a carton is short one manual or one cable, the weight difference is usually a few grams to tens of grams — far above this machine's decision threshold. A missing item has nowhere to hide on the scale; it's caught right there.
Dual mode: stop-and-weigh and continuous weighing
Belt speed is adjustable 5-40 m/min, so fast lines run continuous weighing without breaking flow; large or top-heavy cartons (checkable size L≤750mm, W≤600mm) can switch to stop-and-weigh, letting the product settle before the reading is taken — stability first. Pick the mode to match your line's pace instead of forcing the line to match the machine.
Faulty-item rejection plus audible-visual alarm
The moment an out-of-tolerance item is detected it acts: pusher-type or paddle-type rejection, selectable to suit the product shape, with a simultaneous sound-and-light alarm to alert line-side staff. Non-conforming products are physically separated from the main flow — no reliance on an operator's quick eyes and hands, so nothing slips through on night shifts or in peak season.
100 recipes, hassle-free changeovers
Multi-product mixed lines are the norm for cartons and electronics packaging. This machine stores 100 product recipes with freely set upper and lower weight limits; at changeover, call one up by product name on the touch interface. Password-based access control prevents accidental parameter changes, and weighing records export via USB for full traceability.
Optional coding & sorting, non-standard customizable
Beyond checkweighing, options include real-time printing, in-line inkjet coding, in-line code reading, in-line labeling, and code-reading sorting — merging weight-check pass and coding traceability into one stop. The machine itself supports non-standard customization to your line: height, direction, and reject lane can all be built to your site.
Problems It Solves for You
The end of the assembly line relies on manual spot checks. A carton the sampling missed ships out short a charger or a manual, becomes a customer complaint, a return, even a retail fine — and when it's time to assign blame, you can't even say which shift let it through.
This machine sits on the line for 100% inspection: within the 1-3000g range every carton is weighed, and any short-weight from a missing item beyond the upper/lower limits triggers immediate pusher rejection and a sound-and-light alarm. Chinese weighing records export via USB, so which shift and which batch is all traceable.
You want to add a checkweighing station but the line is already packed; a separate standalone checkweighing line means tearing up the line, adding transfer conveyors, and taking a hit on floor space and downtime.
This machine is designed precisely to mount in the middle of an assembly line. The weighing section is only L450mm×W300mm; splice it into the existing line and it runs — no change to your current layout, saving the labor and space of a dedicated checkweighing station.
One line runs dozens of carton SKUs; at changeover a veteran manually resets the upper and lower limits, and one misplaced decimal misjudges the whole batch. New staff don't dare touch it.
The machine stores 100 recipes; set upper and lower limits however you like and call them up by product name with one tap. Password-based access control keeps parameter editing locked to the administrator — ordinary operators can only select a recipe, not change parameters.
Packaging boxes are large and top-heavy; on an ordinary checkweigher, dynamic weighing shakes and the reading drifts, over-rejecting and drawing complaints from the line.
The checkable product size is widened to L≤750mm, W≤600mm, with a stop-and-weigh mode — large items settle in the weighing section before the reading is taken. Combined with 0.1g display division and ±0.5-2g weighing accuracy, it drives the false-reject rate down.
Technical Specifications
| Product model | MQ-CW4530L3 |
|---|---|
| Display division | 0.1g |
| Weighing range | 1-3000g |
| Weighing accuracy | ±0.5-2g |
| Weighing section size | L 450mm*W 300mm |
| Suitable product size | L≤300mm; W≤300mm |
| Rejection method | Pusher or lever reject (optional) |
| Optional features | Real-time printing, code-reading sort, inline inkjet coding, inline code reading, inline labeling |
| Stored recipes | 100 recipes |
| Conveyor speed | 5-40 m/min |
| Power supply | AC220V±10% |
| Machine material | Painted carbon steel |
| Data transmission | USB data export |
| Number of sections | Standard: 2 sections; optional: 3 sections |
Functions in Detail
Rejection method: pusher or paddle selectable
Faulty items aren't stopped by people. Pusher type suits cartons and packaging boxes with regular flat faces, pushing them sideways off the main line; paddle type suits faster lines with small product spacing, sweeping items into a recovery lane. Rejection triggers a sound-and-light alarm at the same time, so line-side staff can see from afar which item failed. Choose by product form and line layout.
Data management: Chinese records + USB export
Every weighing leaves a Chinese-language record; plug in a USB drive after the shift to export and archive the data. Real-time printing is optional, so weighing results travel with the product. If a customer complains of a missing item, pull up that day's batch weighing records to prove whether it left the factory compliant or the issue arose in distribution. With password-based access management, who changed which parameter and when is clearly attributable.
Two weighing modes match line cadence
In continuous weighing mode the belt is adjustable 5-40 m/min, keeping pace with the line without breaking flow; stop-and-weigh mode lets the product settle in the weighing section before reading — ideal for larger, top-heavy boxes, avoiding dynamic sway affecting the reading. Two approaches in one machine, so re-cadencing the assembly line needs no equipment change.
Optional functions: merge checkweighing and coding into one step
Optional in-line inkjet coding, in-line labeling, in-line code reading, code-reading sorting, and real-time printing are supported. A typical setup codes/labels only after the weight check passes; rejects are removed and left uncoded — mechanically preventing short-packed items from leaving with a compliant mark. One machine occupies one line segment and does the work of two processes.
Structure & installation: save labor and space
The weighing section is L450mm×W300mm, standard 2-section structure with optional 3-section (adding a reject or buffer section), set directly in the middle of the existing assembly line with no need to dismantle or re-lay it. The carbon-steel painted housing suits the workshop environment, running on ordinary AC220V±10% mains. Daily cleaning is just wiping the belt and weighing platform — maintenance needs no dedicated technician.
Industries & Application Scenarios
End-of-line in-line checkweighing for phone, earphone and charger color-box lines. One missing accessory — a cable, a manual, a SIM pin — throws the weight over tolerance instantly; the pusher rejects it on the spot, keeping short-packed units out of the channel.
Kettles, shavers and the like are weighed straight after boxing to verify the power cord and accessory pack are complete. Checkable size L≤750mm, W≤600mm fits common small-appliance color boxes.
Holiday gift boxes and combo sets mix many items, and manual counting easily misses one. Set upper and lower limits by the set's standard weight — a missing sample vial or greeting card triggers the sound-and-light alarm and rejection.
Building blocks and assembly toys have many parts and varied specs; 100 recipes cover different SKUs, called up with one tap at changeover. A color box missing a parts pack is separated by the pusher right on the line.
Carton factories assemble and box for clients; before shipment each box is checkweighed, with optional in-line labeling and coding — merging weight-check pass and code traceability into one process, with solid records for factory audits.
Screw packs and parts kits are boxed by set; the 1-3000g range covers everything from a small bag of fasteners to a full box of parts. A missing pack's weight difference far exceeds the ±0.5-2g accuracy, so it's reliably caught.
Own Factory · Seeing Is Believing
Guangdong Miqi designs, builds and tests every machine in-house — each unit is bench-tested before shipment. Free sample testing, on-site factory visits and live video of the running machine are all welcome.
Compare this model with other configurations in custom weighing and inspection systems.
Further reading
How Does a Checkweigher Work? Infeed, Dynamic Weighing and Automatic Rejection
A dynamic checkweigher weighs every moving pack, compares the filtered result with recipe limits and removes or records exceptions. This engineering guide explains the complete three-stage process, the load-cell signal chain and the line conditions that determine repeatability.
Checkweigher Calibration and Dynamic Verification: A Practical Line Test
Calibration establishes the relationship between indication and reference mass; verification checks whether the complete checkweigher still performs acceptably in production. Use this repeatable workflow to test multiple weights, speeds and reject outcomes without confusing resolution with accuracy.
Checkweigher Reject Systems: Air Blast, Pusher, Flap, Arm, Wheel or Stop Alarm
The best checkweigher rejector is the one that removes the real product reliably at the real speed. Compare six mechanisms by product mass, stability, line rate, available air, hygiene and fail-safe confirmation requirements.
MQ-CW4530L3 — Watch the Machine Running
Real machine footage with genuine on-screen readings — no animation.
Frequently Asked Questions
What is the price of Precision In-Line Checkweigher for Assembly Lines (MQ-CW4530L3)?+
Pricing depends on the weighing range, rejection method, conveyor dimensions and selected options. Send the product weight, dimensions and line speed for a factory-direct quotation.
Does MIQI export Custom Solutions worldwide?+
Yes. MIQI ships worldwide with export packing, operating documents, configurable voltage and remote commissioning support. OEM branding and application-specific engineering are available.
Tell Us About Your Product
Share your product weight range, dimensions and line speed — our engineer replies within 24 hours with model recommendation and quotation.
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