FP Conveyor Belt Scale

THAYER Model No.
No. of Weigh Idlers
1, 2, 3, 4, 5
Belt Width (W) Inches
18 – 72
Minimum Load (lbs/ft)
Maximum Loading (lbs/ft)
Mass Counter-Balanced Weigh Bridge
Belt Speed (Ft/Min)
Accuracy (%) Design Rate
0.25% – 0.5%
Load Cell Support
(1) strain gauge/LVDT
Materials Handled
Cereal, wood chips, hazardous waste, tobacco, Rice Flakes, wood waste, bran, wood fiber,  whole eggs,  Corn Flakes, potatoes, chocolate, compost, cement, tomatoes, rock wool, sludge, coal,  rice,  wheat, OSB mat, MDF


THAYER Model FP – Flat Belt Conveyor Scale – Multiple Weigh Idlers

The THAYER “FP” Conveyor Belt Scales is a unique weighing scale specifically designed to accurately weigh “low density” materials. Weighing deck typically consists of 2 to 6 flat idlers, mounted either horizontally or at an incline of up to 12 degrees, depending on material handled. It can be used in new installations or can be seamlessly integrated into an existing conveyor. Typical application include cereals, snack foods, pet foods, wood fibers, paper waste, tobacco, and textiles (bulk densities ranging from 0.5 to 25 pcf).

Specialized Scale design assures reliable, accurate weighing.

The most important element of the FP Belt Scale is its scale system, which utilizes Thayer Scale’s “FMSS” technology (see below). The FP has a unique combination of features that make it ideal for low density belt weighing:

  • High efficiency “dead Load” counterbalancing, up to 500 lbs.
  • Load sensor sized to utilize its full range for “live load” only
  • Calibration maintained under heavy overloading, 1,000+lb.
  • Ultra-low deflection ( Non-tilting platform design for conveyor alignment stability.
  • Provisions for built in automatic test weight.
  • Easy to re-range in the field.

“FMSS” Scale Technology

A Force Measurement Suspension System (FMSS) is the arrangement of active mechanical elements interposed between the load receptor (belt) and load cell. Properly designed, the FMSS functions as a force vector filter that permits the sum of the chosen uni-directions force components to pass through the system to the load cell while blocking all other nuisance, erroneous or destructive force vectors.


Flexure plate system eliminates all wearing parts, such as bearings, pivots and knife edges and is not susceptible to vibration. Flexure suspension system transfers all loading forces to a single load transducer, which accurately measures load regardless of load position. Most platform scales are not designed to be immune to side loading and/or tortional loading caused by the plant environment and by the movement of the feed screw, agitator, etc. These factors can cause poor accuracy and poor calibration stability. Thayer’s flexure system cancels all horizontal force vectors and also allows heavy tare loads (weight of feeder and hopper) to be completely mass counterbalanced , permitting load cell sizing based on net rather than gross weight.