Used Checkweighers

Used Checkweighers for Precise In-Line Weight Control

Every underweight package is a compliance risk, and every overweight one is product you’re giving away for free. A checkweigher catches both – weighing each pack in motion and pulling anything outside your limits before it ships. The used checkweighers above cover that job across a range of products and package sizes. Hunting for a specific used checkweigher for sale, like a Mettler-Toledo? Give us your product, weight range, and line speed, and we’ll help you match one. Call CWR Resources at (630) 262-9595.

What does a checkweigher do?

A checkweigher is an automatic, in-motion scale that weighs each package as it travels along a conveyor and compares the reading to preset limits – passing packs that are within tolerance and rejecting those that run over or under. It usually sits near the end of a line, right after filling or packing, and clears out-of-spec products with an air jet, pusher, drop-flap, or diverter into a reject bin. Its value runs two ways: it keeps you compliant with net-content and average-weight rules, and it curbs costly overfill by feeding weight data back to your filler. Checkweighers are standard equipment across food, beverage, pharmaceutical, and personal care production.

Types of used checkweighers we stock

Checkweighers differ mainly by how much they weigh, how precisely, how fast, and how they reject. The right combination depends on your product and your line:

• Weight range and accuracy. Precision units resolve fractions of a gram for pharmaceutical and small-package work; heavier machines handle bags and cases at coarser resolution. Weigh cells range from strain-gauge load cells to electromagnetic force restoration (EMFR) for the highest speed and accuracy.
• Speed. Throughput runs from modest rates up to several hundred packs per minute, matched to the line the machine feeds.
• Reject method. Air-blast nozzle, pusher or paddle, drop-flap, or diverter gate – chosen to suit the size, weight, and fragility of your package.
• Combination systems. Many checkweighers are paired with metal detection or X-ray inspection in one frame, so ask if you need combined weight-and-contamination control rather than two separate machines.

Mettler-Toledo checkweighers

Mettler-Toledo is one of the most trusted names in checkweighing – it builds its machines under the Hi-Speed brand in the Americas and the Garvens brand elsewhere, both known for accurate, high-speed weight control. Many of its checkweighers use monoblock electromagnetic force restoration (EMFR) weigh cells that hold their accuracy at fast line speeds and shrug off temperature swings and vibration, while others use rugged strain-gauge load cells. They’re a mainstay in food and pharmaceutical plants, and they pair readily with Mettler-Toledo Safeline metal detection or X-ray for combined inspection in a single frame. A used Mettler-Toledo checkweigher is a strong choice when accuracy and uptime aren’t up for negotiation.

Other brands and changing stock

Mettler-Toledo isn’t the only name we handle. We take in quality checkweighers from other respected makers as they become available, and inventory turns over constantly – so if you’re after a particular brand, model, or weight range, check the inventory above or contact us and we’ll tell you what’s in stock or on the way.

How to spec a used checkweigher

Matching a used checkweigher to your line comes down to a handful of specifics:

• Weight range and accuracy. Match the machine’s capacity and resolution to your product – a gram-accurate pharmaceutical unit and a case checkweigher are very different machines.
• Speed. Match packs per minute to your line so the checkweigher keeps pace without holding things up.
• Package and reject method. The reject mechanism has to suit your pack’s size, weight, and fragility, so confirm it fits what you run.
• Weighing technology. EMFR for the highest speed and precision; strain-gauge load cells for heavier or more cost-sensitive applications.
• Combination needs. Decide whether you also want integrated metal detection or X-ray in the same frame.
• Data and compliance. If you report net contents, feed weights back to a filler, or need audit-ready records for pharma, confirm the controls support it.
• Condition and intended use. Production-ready or a parts and rebuild candidate – we’ll be clear about where each machine stands.

Why CWR for a used checkweigher?

With a checkweigher, condition isn’t cosmetic – it comes down to whether the machine still weighs true and rejects reliably. That’s exactly why we evaluate equipment in person before we buy it, traveling to where it’s installed to see it firsthand and grade it honestly, so you know upfront whether you’re getting a production-ready unit or a parts and rebuild candidate. CWR has worked in used packaging and processing equipment since 1997, with machines staged across every region of the country and buyers served throughout the U.S., Canada, and Mexico. Buying used puts precision equipment within reach at well under the price of new – and keeps a capable machine earning its keep instead of sitting idle.

Used checkweigher FAQ

What’s the difference between a checkweigher and a regular scale?

A scale weighs a stationary item when you place it on the platform. A checkweigher weighs every package automatically, in motion, at line speed – then accepts or rejects each one against your preset limits without an operator in the loop. It’s built for 100% inline inspection, not spot checks.

What weight accuracy can a used checkweigher achieve?

It depends on the machine and its weigh cell. Precision EMFR-based units can resolve fractions of a gram for small or pharmaceutical packs, while heavier machines trade fine resolution for the capacity to weigh bags and cases. Accuracy also depends on line speed and how well the machine is set up for your product.

How does a checkweigher reject out-of-spec packages?

Common methods include an air-blast nozzle, a pusher or paddle arm, a drop-flap, or a diverter gate that sends rejects into a separate bin. The right mechanism depends on how large, heavy, and fragile your packages are.

Can a checkweigher also detect metal or other contaminants?

Yes. Many checkweighers are built as combination systems with metal detection or X-ray inspection in the same frame, giving you weight verification and contamination control in one footprint. We can source standalone or combination units depending on what your line needs.

Can I buy a used checkweigher for parts?

Yes. Alongside production-ready machines, we often carry older or non-running checkweighers that make good sources of load cells, conveyors, reject mechanisms, and controls. Ask us what’s currently available for parts.

What condition are your used checkweighers in?

It varies from machine to machine, and we’ll always be straight about it. Some are production-ready and can be seen running; others are sold as-is or as parts and rebuild candidates. Because we evaluate equipment on-site before taking it in, you get an honest read on condition before you buy.

Can you help match a checkweigher to my line?

Gladly. Tell us your product, weight range, line speed, and package type, and we’ll help you find a machine that fits – including whether a combination metal-detection unit makes sense. Reach out and we’ll talk it through.

Do you sell used checkweighers nationwide?

Yes. With equipment stored across every region of the United States, we serve buyers nationwide, along with Canada and Mexico.

Ready to tighten your weight control?

A used checkweigher is an affordable way to protect your net weights, cut overfill, and keep out-of-spec packs off the truck. If you’re ready to add one or replace an aging unit, browse the inventory above or get in touch – we’ll help you find a machine sized to your product, speed, and accuracy needs.