Master™ 421 Belt Scale Weigh Frame

As of: Tuesday, December 2, 2025

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Standard Features

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

Applications

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.

421 Master Belt Scale Weigh Frame Specifications

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

Capacity:
30 tons per hour

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

Inclination:
10 degrees

Material:
Powder coated mild steel, 304/316 stainless steel

Accuracy Systems:
1.0 %

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

Warranty:
One-year limited

Parts

Part #	Description

Consult	421 weigh frame