Automatic Checkweigher
0.05-30kg wide-range case checkweigher with ±3-10g accuracy — even one missing bag of nuts can't get past it
Automatic Checkweigher (MQ-CW8050L30) — range 0.05-30kg, accuracy ±3-10g. Factory-direct from Guangdong, China. OEM & custom available.
Typical applications: Full-case packaging (corrugated cartons, printed color boxes) and large bagged gift packs (e.g., nut and snack assortment packs)
Key Features
- ✓Full stainless steel construction with IP65 rating
- ✓Three-level user access management with customizable passwords
- ✓User-friendly touchscreen operation
- ✓Variable-frequency drive (VFD) motor with speed adjustable as required
- ✓Tri-color light tower with over/under-limit alarms for strict in-line quality control
- ✓Integrates with cartoning machines, production lines, automatic filling machines, vertical packaging machines, and more
Why Choose MQ-CW8050L30
30kg Full-Case Checkweighing
Weighing range 0.05-30kg with 1g display resolution on an 800×500mm weighing section, handling cartons and printed boxes up to 600mm long and 500mm wide. Full-case accuracy of ±3-10g means a missing snack pouch of just a few dozen grams shows up instantly in the weight — and the machine rejects the box automatically.
±3-10g Catches Missing Items
For a gift case weighing over ten kilograms, ±3-10g accuracy means one missing pouch of nuts or even an insert card gets the box flagged as a reject. Far more reliable than hand-weighing or opening boxes for spot checks — no re-inspection required.
5-90m/min Variable-Speed Drive
Frequency-controlled motor with belt speed continuously adjustable from 5-90m/min. Run light items fast for throughput, slow heavy cases down for stable weighing, and match the pace of your case packers and sealers upstream and downstream — the line sets the rhythm, not the machine.
Pusher or Swing-Arm Rejection
Heavy full cases can't be rejected with air blast. This machine offers pusher-type and swing-arm rejectors, selected by case weight and format, pushing rejects smoothly off the main line without tipping boxes or jamming the conveyor — downstream handling stays clean.
304 Stainless Steel + IP65
Full 304 stainless steel housing with IP65 protection stands up to workshop humidity, dust, and routine washdown. For food and personal-care plants with strict hygiene requirements, the build material clears the bar from day one.
100 Recipes, One-Touch Changeover
Stores 100 product recipes. Switching case formats or SKUs is just a matter of recalling the saved parameters — no resetting weight limits. For multi-SKU e-commerce warehouses and contract packers, changeovers no longer wait for a technician.
Problems It Solves for You
Gift packs and full cases rely on manual hand-weighing and spot checks; one box with a missing bag reaches the customer, and a single marketplace complaint means compensation plus a store rating penalty
In-line 100% inspection replaces spot checks: ±3-10g verification across 0.05-30kg, one missing pouch triggers the pusher rejector — non-conforming cases never leave the plant
Thousands of cases a day in peak season, two workers stationed behind the case sealer re-weighing; fatigue sets in and the afternoon miss rate is visibly worse than the morning's
Belt speed adjustable 5-90m/min keeps pace with the packing line for continuous 100% checking; tri-color light alarms and rejects on over/under limits — the machine never dozes off and the standard never drifts
Many product formats: every case-format change means a senior operator re-calibrating limits, half an hour lost per changeover — small-batch orders don't pay off
100 stored recipes recalled from the touchscreen at changeover; three-level access rights separate administrators from operators, so floor staff can't scramble the parameters
When a complaint comes in, there are no weighing records to prove whether the batch left the factory conforming — you can only pay up
Weighing data exports to USB for archiving, with optional real-time printing and in-line barcode reading and labeling — every case's weight is on record, traceable to batch
Technical Specifications
| Product model | MQ-CW8050L30 |
|---|---|
| Display division | 1g |
| Weighing range | 0.05-30kg |
| Weighing accuracy | ±3-10g |
| Weighing section size | L 800mm*W 500mm |
| Suitable product size | L≤600mm; W≤500mm |
| Rejection method | Pusher or swing-wheel reject (optional) |
| Optional features | Real-time printing, code-reading sort, inline inkjet coding, inline code reading, inline labeling |
| Stored recipes | 100 recipes |
| Conveyor speed | 5-90m/min |
| Power supply | AC220V±10% |
| Machine material | 304 stainless steel |
| Number of sections | Standard: 1 section; optional: 3 sections |
| Data transmission | USB data export |
Functions in Detail
Rejector Selection by Case
Pusher-type suits free-standing cartons and printed boxes — direct action with controlled stroke; swing-arm type diverts heavier, larger cases more gently without tipping or spilling. Tell us your case weight, format, and line speed before ordering and we configure the rejector to your conditions — stable rejection even at full 30kg.
Data Management & Access Rights
Three-level access control with user-set passwords: operators can only select recipes and start the machine, while parameter changes are reserved for administrators — no accidental limit edits. Weighing data exports via USB, and with optional real-time printing you can produce outgoing inspection records and customer reconciliation statements on demand.
Optional Function Extensions
Beyond checkweighing, options include in-line coding, barcode reading, read-and-sort, and in-line labeling — merging coding, labeling, and sorting into a single pass on one machine. The weighing section comes standard with 1 segment, optional up to 3, leaving upgrade headroom for higher throughput or multi-station layouts.
Line Integration Capability
Combines with cartoners, filling machines, vertical baggers, and existing production lines, with infeed/outfeed height and speed matched on site. Standard AC220V±10% power means plug-and-play — no dedicated industrial supply needed, so retrofitting older workshops is straightforward.
Alarms & Quality Gatekeeping
Tri-color light signals over/under limits: pass releases, out-of-tolerance alarms and rejects — line-side status readable at a glance. Set upper and lower limits per recipe on the touchscreen, controlling both giveaway from overweight and short-fill risk from underweight, with the checkpoint set at the last station before shipment.
Industries & Application Scenarios
Holiday gift cases mix a dozen-plus small pouches per box, and manual packing misses items easily. Full-case weighing with ±3-10g verification rejects any box short one pouch on the spot — no more missing-item reviews
Multi-SKU mixed shipping with 100 recipes switched by order case format; full-case weight verification before dispatch intercepts wrong and short shipments, with USB data export for reconciliation records
In-line 100% inspection downstream of cartoners and case sealers, keeping pace at 5-90m/min without slowing the line; 304 stainless steel body meets food-plant hygiene management requirements
Full cases of laundry detergent and care sets run up to 30kg; the swing-arm rejector diverts heavy cases smoothly, and IP65 protection shrugs off workshop moisture and washdown
Full cases of bottled drinks and bagged grain and oil are heavy and high-volume; short-filled cases missing a bottle or bag are caught before retail acceptance can bounce an entire batch
Many light components per case: weight deviation verifies packing completeness, so a missing accessory or even a manual shows up in the weight difference
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.
Further reading
PPWR Compliance Calendar for Non-EU Exporters: What Actually Applies on 12 August 2026 (and What Doesn't Until 2030)
Regulation (EU) 2025/40 — the Packaging and Packaging Waste Regulation — entered into force on 11 February 2025 and becomes generally applicable on 12 August 2026. Much of what circulates online puts the wrong obligations on that date. What genuinely bites in August 2026 is the substance and documentation layer: the Article 5(4) 100 mg/kg combined limit on lead, cadmium, mercury and hexavalent chromium; the Article 5(5) restriction on PFAS in food-contact packaging; harmonised labelling under Article 12; and the mandatory Declaration of Conformity under Article 39 (template in Annex VIII), covering Articles 5 to 12, with technical documentation retained five years. Packaging minimisation under Article 10 and the 50% empty-space cap under Article 24 do not apply until 1 January 2030. This article lays the calendar out accurately, then goes one step further into the engineering consequence almost nobody writes about: PPWR extended producer responsibility fees are reported to be levied per kilogram of packaging placed on the market, which turns packaging weight into a recurring cost line — and makes filling and checkweighing accuracy a financial control, not just a quality one.
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.
MQ-CW8050L30 — Watch the Machine Running
Real machine footage with genuine on-screen readings — no animation.
Frequently Asked Questions
What is the price of Automatic Checkweigher (MQ-CW8050L30)?+
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 Automatic Checkweighers 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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