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Master™ 421 Belt Scale Weigh Frame

  • Ideal for flat belt conveyors
  • Roller supported on both sides by load cells
  • Open design for easy cleaning


  • Light capacity, food production and light granular materials

421 Master Belt Scale Weigh Frame

The 421 Master belt scale weigh frame is specifically designed for high volume, low-density applications where belt load and belt speed are moderate. Ideal for flat belt conveyors, the 421 features two BM11 bending beams and hermetically sealed load cells mounted to adjusting plates on the outside of the conveyor stringers to create a stable base. The 421 master belt scale is also available for hazardous and explosive areas.

Conveyor Width:
12 to 60 in (300 to 1,600 mm)

30 tons per hour

Belt Speed:
400 ft/minute (2 m/s)

10 degrees

Powder coated mild steel, 304/316 stainless steel

Accuracy Systems:
0.5 %

Load Cell:
RL9018SS single-ended beam in 10kg, 20kg or 50 kg capacities

One-year limited

Resources / Downloads

Title View Email Category Type
Rolling with the Cranberry Punches View Email Belt Scale Weigh Frames Application Story

Title Download Email
Master 421 Belt Scales Catalog Page Download Email

Title Version Revision Download Email Category Archived
Master 421 Belt Scale Installation Manual Download Email Belt Scale Weigh Frames|Belt Scale Components No

Title Download Email
Belt Scale Application Questionnaire Download Email

Title Collateral Wizard Request Download Email Category
Belt Scale In-Motion Systems Request Download Email Belt Scale Weigh Frames|Bulk Indicators/Controllers


Part # Description List Price Cart
Consult 421 weigh frame

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