Scale Designs


Scale Designs develops and manufactures hopper scales. Our primary focus has been on manufacturing NTEP Certified stainless steel fertilizer hopper scales and blender scales. Our fertilizer scales are designed to last as long, or longer, than your stainless steel hoppers. We build stainless steel fertilizer blender scales, hopper scales, general purpose hopper scales, tank scales, fertilizer dealer scale management systems and general purpose custom scales and weighing systems. Initially, our scales were mostly to retrofit hoppers and blenders manufactured by Adams, A. J. Sackett, Burton, Doyle, Kraus, Layco, R & R, Ranco, Speed King, Tyler, Waconia and/or almost any 5 to 12 ton capacity blender/hopper. Now, some customers are ordering their blending systems, without the scales, from blend manufacturers and the fertilizer scales or weighing systems from us. Some have worked with us to deliver the very best value in blending and weighing.

Norm DeJong at East Central Iowa Cooperative in Jesup bought our scale for his Waconia weigh-hopper.  After installing, Norm sent an email telling us that we were way off on our 2-4 hours for installation. It took about half a day to cut out the old scale.  Once the weigh hopper was lifted and the old scale pieces moved away, it only took minutes to slide the new scale under the hopper and drop in the bolts. He said the scale technician from Fairbanks came the next day and hooked up the read out/printer and calibrated in about half an hour. He arrived mid morning and Norm said he commented as he finished,  “thought I’d be here ‘till 9:00 tonight.”  A few months later East Central Iowa Coop bought another scale for their R & R system in Hudson.


Why Scale Designs?

  • Stainless steel at mild steel prices
  • NTEP approved … legal for trade, no requirement for another scale
  • No moving parts for fertilizer to obstruct
  • Calibrated in 5 lb increments for precision weighing
  • Space age poly-block (Patent Pending) Integrated design
    • Reduces binding from changing temps
    • Increases protection from lightning
    • Reduces shock and vibration

Scale Designs has the solution for your fertilizer scale problem.

Did your mild steel mechanical scale pass its biggest test ...the test of time?

Our Scale Fits Your
Vertical Blender or Weigh Hopper

A retrofittede Waconia Hopper Scale
Old Kraus - 1
Old Doyle - 3
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This old Kraus gets a face lift

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This 5-ton Doyle appeared to be worn out. Now look at it!

New Kraus - 1

Another Waconia vertical blender is back in action!


It turns out only the scale needed to be replaced and years later, they’re still working quite well,

Thank You!


Fertilizer eats mild steel scales, it makes our Stainless Steel scale SHINY”!

For Clarification:
A few scale dealers do not understand that our scale has been certified as a complete weighing system for the requirements mentioned above. Perhaps because some companies attempted to put stands under the corners of a hopper, hook up load cells and an indicator and say it is NTEP Certified. It is not! Some simply don’t want to give up the service revenue generated by mechanical scales. Several years ago when TN became an NTEP state, we were not happy about having to go through the rigorous National Type Evaluation Program (NTEP) conducted by the National Conference on Weights and Measures (NCWM) but we did and now we’re happy we did.

Important note: Every component, particularly the frame, was subjected to rigorous and expensive testing procedures before the scales were NTEP certified. At the time, we were not thrilled about it, but now we have the only NTEP certified fully electronic Stainless Steel scale (that we know about) that is legal for trade with fertilizer blenders/tanks/weigh hoppers. We are using some design elements (trade secrets) that are unique to our scale. References from major fertilizer vendors and independents are available on request. Our customers are our best salespeople.

The stainless steel frame is shipped pre-wired with all components installed and custom fitted to match the fittings on your vertical blender or weigh-hopper. Typical installation takes 2- 4 hours. NTEP certified for up to 12 tons.

Length, width, height, size of plates, hole pattern on plates or legs for Kraus are adjusted to match your blender or hopper.


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Certificate Number: 06-021


If your scale breaks,

call us or have your dealer call us.

We can get you back in operation with a new scale faster than anyone else that we know about. Typical delivery is about a week to ten days but when all our orders are for working replacements we will attempt to replace broken scales first


that can be pretty fast!

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