Thayer Scale Belt Scales: Commercial Grade and Certified Quality

Thayer Scale’s conveyor belt scales & conveyor weighing systems are designed for a range of accuracies: high accuracy loading and unloading systems, custody transfer and NTEP-approved versions (0.10% – 0.125%), inventory control and processing needs (0.25% – 0.5%), and various stone and aggregate applications (0.5% to 1%). Customers in fertilizer, mining, ore, copper, and coal industries utilize our conveyor belt scales in severe applications and in some of the harshest manufacturing environments. Other industries, including pulp and paper and tobacco processing, use our belt scales for light-loading applications. These examples illustrate how our standard designs can support a wide range of belt scale applications with only minor modifications.

We offer many special configurations with our conveyor weighting system and scale prices; designed for light-scale loading of materials such as biomass, wood chips, saw dust, tobacco and MSW. We build 1, 2, 3, 4, 6 and 8 idler belt scales supporting belts from 14 to 96 (and over) inches wide.

Thayer Scale’s conveyor belt scales offer:

A weighbridge that features an exclusive rocking flexure suspension system for both Approach and Approach/Retreat configurations

High measurement sensitivity, low deflection, and a single load cell that is isolated from significant error-producing forces including:

  • Extraneous lateral forces
  • Off-center loading
  • Foundation distortion
  • Inclination holdback forces
  • High sporadic shocks and overloads

Mass-counterbalanced tare loads to create a high signal‐to‐noise ratio in weight-sensing

Proven immunity to zero biases and shifts, resulting in a stable scale zero—the foundation of all continuous weighing devices

Test weights to physically exercise the scale lever (we avoid resistor calibration, which can mask systemic errors in the belt scale installation)

A fixed-circumference precision belt-travel sensing wheel simply mounted to the conveyor stringers using four bolts

Conveyor Belt Systems for Sale

1RF-3ASG “QUARRY KING” CONVEYOR BELT SCALE Feeders

1RF-3ASG “Quarry King” Conveyor Belt Scale

THAYER Model No.
1RF-3A “Quarry King”
No. of Weigh Idlers
1
Belt Width (W) Inches
18-30
Idler Spacing (S) Inches
30-60
Minimum Load (lbs/ft)
Consult Factory
Maximum Loading (lbs/idler)
300
Mass Counter-Balanced Weigh Bridge
NO
Belt Speed (Ft/Min)
10-1000
Accuracy (%) Design Rate
1
Accuracy (%) 3:1 Range
2
Load Cell Support
(1) strain gauge

 

2LLRF-4A Light Loading Conveyor Belt Scale

THAYER Model No.
2LLRF-4A
No. of Weigh Idlers
2
Belt Width (W) Inches
14-48
Idler Spacing (S) Inches
42-60
Minimum Load (lbs/ft)
5.4
Maximum Loading (lbs/idler)
300
Mass Counter-Balanced Weigh Bridge
YES
Belt Speed (Ft/Min)
10-1000
Accuracy (%) Design Rate
0.25%
Accuracy (%) 3:1 Range
0.5%
Load Cell Support
LVDT

1RF-4ASG “Quarry King” Conveyor Belt Scale

THAYER Model No.
1RF-4ASG “Quarry King”
No. of Weigh Idlers
1
Belt Width (W) Inches
36-48
Idler Spacing (S) Inches
30-60
Minimum Load (lbs/ft)
Consult Factory
Maximum Loading (lbs/idler)
300
Mass Counter-Balanced Weigh Bridge
NO
Belt Speed (Ft/Min)
10-1000
Accuracy (%) Design Rate
1
Accuracy (%) 3:1 Range
2
Load Cell Support
(1) strain gauge

 

2LLRF-6A LIGHT LOADING Conveyor Belt Scale

THAYER Model No.
2LLRF-6A
No. of Weigh Idlers
2
Belt Width (W) Inches
14-48
Idler Spacing (S) Inches
42-60
Minimum Load (lbs/ft)
Consult Factory
Maximum Loading (lbs/idler)
Consult Factory
Mass Counter-Balanced Weigh Bridge
YES
Belt Speed (Ft/Min)
10-1000
Accuracy (%) Design Rate
0.25%
Accuracy (%) 3:1 Range
0.50%
Load Cell Support
(1) strain gauge/LVDT

1RF-4A Conveyor Belt Scale

THAYER Model No.
1RF-4A
No. of Weigh Idlers
1
Belt Width (W) Inches
14-48
Idler Spacing (S) Inches
36-60
Minimum Load (lbs/ft)
7.2
Maximum Loading (lbs/idler)
300
Mass Counter-Balanced Weigh Bridge
YES
Belt Speed (Ft/Min)
10-1000
Accuracy (%) Design Rate
1
Accuracy (%) 3:1 Range
2
Load Cell Support
(1) strain gauge / LVDT

 

2RF-6ALA Light Loading Conveyor Belt Scale

THAYER Model No.
2RF-6ALA
No. of Weigh Idlers
2
Belt Width (W) Inches
24-72
Idler Spacing (S) Inches
42-60
Minimum Load (lbs/ft)
4.2
Maximum Loading (lbs/idler)
800
Mass Counter-Balanced Weigh Bridge
YES
Belt Speed (Ft/Min)
10-1000
Accuracy (%) Design Rate
0.25%
Accuracy (%) 3:1 Range
0.50%
Load Cell Support
LVDT

3RF-6ALA Light Loading Conveyor Belt Scale

THAYER Model No.
3RF-6ALA
No. of Weigh Idlers
3
Belt Width (W) Inches
30-60
Idler Spacing (S) Inches
36-60
Minimum Load (lbs/ft)
3.2
Maximum Loading (lbs/idler)
600
Mass Counter-Balanced Weigh Bridge
YES
Belt Speed (Ft/Min)
10-1000
Accuracy (%) Design Rate
0.25%
Accuracy (%) 3:1 Range
0.50%
Load Cell Support
LVDT

2RF-4A Conveyor Belt Scale

THAYER Model No.
2RF-4A
No. of Weigh Idlers
2
Belt Width (W) Inches
14-48
Idler Spacing (S) Inches
36-60
Minimum Load (lbs/ft)
5.4
Maximum Loading (lbs/idler)
300
Mass Counter-Balanced Weigh Bridge
YES
Belt Speed (Ft/Min)
10-1000
Accuracy (%) Design Rate
0.25%
Accuracy (%) 3:1 Range
0.50%
Load Cell Support
(1) strain gauge/LVDT

4RF-6ARLA Light Loading Conveyor Belt Scale

THAYER Model No.
4RF-6ARLA
No. of Weigh Idlers
4
Belt Width (W) Inches
24-60
Idler Spacing (S) Inches
42-60
Minimum Load (lbs/ft)
2.1
Maximum Loading (lbs/idler)
525
Mass Counter-Balanced Weigh Bridge
YES
Belt Speed (Ft/Min)
10-1000
Accuracy (%) Design Rate
0.125%
Accuracy (%) 3:1 Range
0.25%
Load Cell Support
(1) strain gauge/LVDT

6RF-6ARLA LIGHT LOADING Conveyor Belt Scale

THAYER Model No.
6RF-6ARLA
No. of Weigh Idlers
6
Belt Width (W) Inches
24-60
Idler Spacing (S) Inches
36-60
Minimum Load (lbs/ft)
1.6
Maximum Loading (lbs/idler)
400
Mass Counter-Balanced Weigh Bridge
YES
Belt Speed (Ft/Min)
10-1000
Accuracy (%) Design Rate
0.100%
Accuracy (%) 3:1 Range
0.125%
Load Cell Support
(1) strain gauge/LVDT

2RFS-6 Conveyor Belt Scale

THAYER Model No.
2RFS-6
No. of Weigh Idlers
2
Belt Width (W) Inches
24-60
Idler Spacing (S) Inches
36-60
Minimum Load (lbs/ft)
5.4
Maximum Loading (lbs/idler)
800
Mass Counter-Balanced Weigh Bridge
YES
Belt Speed (Ft/Min)
10-1000
Accuracy (%) Design Rate
0.25%
Accuracy (%) 3:1 Range
0.50%
Load Cell Support
(1) strain gauge/LVDT

3RFS-6 Conveyor Belt Scale

THAYER Model No.
3RF-6A
No. of Weigh Idlers
3
Belt Width (W) Inches
24-60
Idler Spacing (S) Inches
36-60
Minimum Load (lbs/ft)
8.8
Maximum Loading (lbs/idler)
600
Mass Counter-Balanced Weigh Bridge
YES
Belt Speed (Ft/Min)
10-1000
Accuracy (%) Design Rate
0.25%
Accuracy (%) 3:1 Range
0.50%
Load Cell Support
(1) strain gauge/LVDT

3RFS-8 Conveyor Belt Scale

THAYER Model No.
3RF-8A
No. of Weigh Idlers
3
Belt Width (W) Inches
30-84
Idler Spacing (S) Inches
36-60
Minimum Load (lbs/ft)
8.8
Maximum Loading (lbs/idler)
1600
Mass Counter-Balanced Weigh Bridge
YES
Belt Speed (Ft/Min)
10-1000
Accuracy (%) Design Rate
0.25%
Accuracy (%) 3:1 Range
0.50%
Load Cell Support
(1) strain gauge/LVDT

4NAR-6 NTEP Certified Conveyor Belt Scale

THAYER Model No.
4NAR-6 Certified Belt Scale
No. of Weigh Idlers
4
Belt Width (W) Inches
24-60
Idler Spacing (S) Inches
36-60
Minimum Load (lbs/ft)
34
Maximum Loading (lbs/idler)
525
Mass Counter-Balanced Weigh Bridge
YES
Belt Speed (Ft/Min)
10-1000
Accuracy (%) Design Rate
0.125%
Accuracy (%) 3:1 Range
0.25%
Load Cell Support
(1) strain gauge

4RFS-6 Conveyor Belt Scale

THAYER Model No.
4RFS-6
No. of Weigh Idlers
4
Belt Width (W) Inches
24-60
Idler Spacing (S) Inches
36-60
Minimum Load (lbs/ft)
4.3
Maximum Loading (lbs/idler)
525
Mass Counter-Balanced Weigh Bridge
YES
Belt Speed (Ft/Min)
10-1000
Accuracy (%) Design Rate
0.125%
Accuracy (%) 3:1 Range
0.25%
Load Cell Support
(1) strain gauge/LVDT

6NAR-6 NTEP Certified Conveyor Belt Scale

THAYER Model No.
6NAR 6
No. of Weigh Idlers
6
Belt Width (W) Inches
24-60
Idler Spacing (S) Inches
36-60
Minimum Load (lbs/ft)
34
Maximum Loading (lbs/idler)
400
Mass Counter-Balanced Weigh Bridge
YES
Belt Speed (Ft/Min)
10-1000
Accuracy (%) Design Rate
0.10%
Accuracy (%) 3:1 Range
0.125%
Load Cell Support
(1) strain gauge

6NAR-8 NTEP Certified Conveyor Belt Scale

THAYER Model No.
NAR 6-8
No. of Weigh Idlers
6
Belt Width (W) Inches
24-60
Idler Spacing (S) Inches
36-60
Minimum Load (lbs/ft)
34
Maximum Loading (lbs/idler)
1200
Mass Counter-Balanced Weigh Bridge
YES
Belt Speed (Ft/Min)
10-1000
Accuracy (%) Design Rate
0.10%
Accuracy (%) 3:1 Range
0.125%
Load Cell Support
(1) strain gauge

6RFS-6 Conveyor Belt Scale

THAYER Model No.
6RFS-6
No. of Weigh Idlers
6
Belt Width (W) Inches
24-60
Idler Spacing (S) Inches
36-60
Minimum Load (lbs/ft)
20
Maximum Loading (lbs/idler)
400
Mass Counter-Balanced Weigh Bridge
YES
Belt Speed (Ft/Min)
10-1000
Accuracy (%) Design Rate
0.100%
Accuracy (%) 3:1 Range
0.125%
Load Cell Support
SG/LVDT

6RFS‐8 Conveyor Belt Scale

THAYER Model No.
6RFS-8
No. of Weigh Idlers
6
Belt Width (W) Inches
24-84
Idler Spacing (S) Inches
36-60
Minimum Load (lbs/ft)
4.3
Maximum Loading (lbs/idler)
1200
Mass Counter-Balanced Weigh Bridge
YES
Belt Speed (Ft/Min)
10-1000
Accuracy (%) Design Rate
0.100%
Accuracy (%) 3:1 Range
0.125%
Load Cell Support
(1) strain gauge/LVDT

8RFS-6 Conveyor Belt Scale

THAYER Model No.
8RFS-6
No. of Weigh Idlers
8
Belt Width (W) Inches
30-72
Idler Spacing (S) Inches
36-60
Minimum Load (lbs/ft)
20
Maximum Loading (lbs/idler)
400
Mass Counter-Balanced Weigh Bridge
YES
Belt Speed (Ft/Min)
10-1000
Accuracy (%) Design Rate
0.100%
Accuracy (%) 3:1 Range
0.125%
Load Cell Support
SG

8RFS-8 Conveyor Belt Scale

THAYER Model No.
8RFS-8
No. of Weigh Idlers
8
Belt Width (W) Inches
24-84
Idler Spacing (S) Inches
36-60
Minimum Load (lbs/ft)
4.3
Maximum Loading (lbs/idler)
1200
Mass Counter-Balanced Weigh Bridge
YES
Belt Speed (Ft/Min)
10-1000
Accuracy (%) Design Rate
0.100%
Accuracy (%) 3:1 Range
0.125%
Load Cell Support
(1) strain gauge/LVDT

8NAR-6 NTEP Certified Conveyor Belt Scale

THAYER Model No.
8NAR-6
No. of Weigh Idlers
8
Belt Width (W) Inches
30-72
Idler Spacing (S) Inches
36-60
Minimum Load (lbs/ft)
34
Maximum Loading (lbs/idler)
400
Mass Counter-Balanced Weigh Bridge
YES
Belt Speed (Ft/Min)
10-1000
Accuracy (%) Design Rate
0.100%
Accuracy (%) 3:1 Range
0.125%
Load Cell Support
SG

8NAR-8 NTEP Certified Conveyor Belt Scale

THAYER Model No.
8NAR-8
No. of Weigh Idlers
8
Belt Width (W) Inches
24-60
Idler Spacing (S) Inches
36-60
Minimum Load (lbs/ft)
34
Maximum Loading (lbs/idler)
1200
Mass Counter-Balanced Weigh Bridge
NO
Belt Speed (Ft/Min)
10-1000
Accuracy (%) Design Rate
0.100%
Accuracy (%) 3:1 Range
0.125%
Load Cell Support
(1) strain gauge

FP Conveyor Belt Scale

THAYER Model No.
FP
No. of Weigh Idlers
1, 2, 3, 4, 5
Belt Width (W) Inches
18 – 72
Minimum Load (lbs/ft)
0.5
Maximum Loading (lbs/ft)
20
Mass Counter-Balanced Weigh Bridge
YES
Belt Speed (Ft/Min)
10-150
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

Belt Travel Pulser

  • Digital Pulse Output
  • Heavy-duty Construction
  • Spring loaded to maintain positive tracking
  • Self-cleaning
  • Minimum surface area for material build-up
  • Easy to install
  • Unaffected by temperature and voltage variations
  • Pulser can be mounted on either side of the wheel for access from either side of the conveyor

FP Belt Scales

The most important element of the FP Belt Scale is its scale system, which utilizes Thayer Scale’s “FMSS” technology. 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 (<0.0005 in.) negates belt tension error
  • Non-tilting platform design for conveyor alignment stability
  • Provisions for built in automatic test weight
  • Easy to re-range in the field