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Conveyor Checkweighers

StreamTech provides, installs and services a broad line of conveyor checkweighers both as integral parts of our shipping and automation systems as also for stand-alone quality control applications.  Below is a sampling of a few of our major checkweigher models.  Please check out our Custom Checkweighers and Options page, or contact us for additional information; we have solved many unique applications beyond what is pictured here.

Medium Duty Conveyor Checkweighers

Medium Duty CheckweighersPreferred Checkweighers for a wide variety of warehousing and distribution applications: bags, boxes, etc. Moderate cost, simple to install; “V”-Guided Belt eliminates tracking issues. MDR (self powered roller) drive system.  Rugged 3″ solid tube base with leveling feet.  Relatively small end pulleys (1.90″ diameter) excellent for transferring small items for use in e-commerce applications.  Many display options to meet the needs of the application.  Controller can be programmed for “Manifest Mode” eliminating “high pass, low pass” etc. readouts that can be confusing in a non-manufacturing environment.  The main chassis is relatively open allowing for easy inspection and maintenance of the load cell area.  Although “Medium Duty” it is excellent for many heavy and harsh applications, such as heavy seed and feed bags, and surprisingly accurate.  Standard sizes allow parts to be kept in-stock for quick shipment.

  • .02-.05 lb accuracy
  • 40 lb. capacity to 80 lb. with mods
  • 12″ or 18″ wide, 26″ or 36″ long
  • V-Guided Belt 60 cpm @ 200 fpm
  • Painted or Stainless
  • All-welded base frame
  • 24VDC roller drive
  • 1.90″ diameter transitions

Sonic Small Item High Accuracy Checkweighers

High Accuracy CheckweighersSmall item, high speed conveyor checkweighers that include infeed and/or discharge belt conveyors. This is a premium unit that is capable of direct food contact and tolerant to washdown applications. Tool-less removal of frames and belt. 1″ dia. rollers for smooth transitions for the smallest parts including cookies and other foodstuffs.  The design can be “ganged” for multi-lane applications. Servo driving belts for smooth operatio and high accuracy. As these accuracies, slight air currents can make a big difference so optional wind tunnels are available to maintain performance. Optional items include reject diverters for out-of-tolerance items or used when sorting by weight, stack lights, etc.


  • 1g or 0.1% accurate
  • 1-25 lb capacity
  • 6-15″ W x12-18″ L
  • Tool-less Belt Quick Change
  • Advanced 5511si Controller
  • Stainless, washdown construction
  • Direct food contact rated
  • 1.00″ diameter transitions

Drag Chain Checkweighers

Drag Chain CheckweighersSmall item, special application conveyor checkweighers. Two, four or more flights of table top or metal chain are used to convey product. The unique combined single drive for infeed settling, outfeed and weigh areas saves cost and complexity, allowing it to be used at a lower cost than the Sonic checkweigher although with similar accuracies. This design allows weighing without the use of photoeyes which can be valuable in harsh environments.  For wider or varying products, more strands of chain can be used for stability.  For items with soft bottoms such as bags, we recommend the Sonic checkweigher, above.  Special transition rollers allow it to handle transitions for smaller items.


  • .5g or 0.1% accurate
  • 1-25 lb capacity
  • 6-15″ W x12-18″ L
  • Stainless Steel, washdown construction
  • Rigid bottom required
  • Optional nose rollers
  • Can operate without photoeyes
  • High accuracy at lower cost

Heavy Duty Checkweighers

Heavy Duty CheckweighersThis ‘workhorse’ is specified when the product is too large or too heavy for the Medium Duty Conveyor Checkweighers, or in extremely abusive environments like concrete, stone, or roofing. Large, heavy products of nearly any shape and size. Engineered for harsh, abusive, dirty environments, such as stone, cement, asphalt, bulk material, etc. 4″ dia. dynamically balanced pulleys, Vee-guided belt. The Heavy Duty Checkweigher has a traditional TEFC motor and is priced assuming its motor controls are integrated with the production line.  Optional internal motor controls are available.


  • .05-.10 lb accuracy
  • 50-200 lb capacity
  • 12″ to 36″ wide and 28″ to 60″ long
  • custom sizes available
  • 50 cpm @ 220 fpm
  • painted or stainless available
  • 480VAC drive
  • optional integrated motor controls