Over 3 Decades of Global Forestry Performance

Out of the Woods and On the Road to Higher Profits

The SI On-Board Forestry footprint spans from the U.S. and Canada across the globe to Australia and New Zealand. Included in our premier line of weighing solutions are the SI On-Board Long and Short Logger, Shear Beam Load Cell-Based Trailers, Fifth Wheel Tractors, and 9150 Interactive Weighing Meters.


Get On-Board with the highest level of safety, ease, and efficiency. Our high-performing systems consist of Double-Gaged, Steel Shear-Beam load cells (with associated electronics) and promote durability, easy installation, and enhanced operation. Consisting of load cells and mounted bearing plates, the strength of these weighing solutions also insure that your loads are fully supported.

SI On-Board Systems Benefits 

  • Maximize legal load capacity every time
  • Reduce loading and adjustment time 
  • Eliminate overweight fines 
  • Reduce maintenance costs and prolong vehicle life 
  • Increase safety

SI On-Board USA Logger Systems Features 

  • Highly-responsive, rugged design for increased performance, durability, and safety
  • Superior performance with suspension system installation
  • Typical accuracy within 1% of GVW (Gross Vehicle Weight)
  • Triple-redundant sealing for increased reliability and longer life 
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Long and Short Logger Shear Beam Systems

The Long and Short Logger systems provide gross and net weight for truck and trailers. We utilize double-gaged steel shear-beam load cells. These easy-to-install and operate systems consist of load cells and their associated bearing plates which are mounted to support the load. Add an in-cab meter, truck and trailer-mounted signal transmitters with the necessary wiring and you are ready to roll.

Canadian Systems >GO TO PAGE

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Long Logger System - 9100910

Designed for the harshest environments, our Titan II load cells are specifically manufactured for SI On-Board scales. They’re temperature compensated with a triple-redundant sealing process.

9100910-01 - Long Logger System With 2 Channel 9100 GW Meter
9100910-02 - Long Logger System With 4 Channel 9100 QC Meter
9100915 - Long Logger System With 4 Channel 9100 QC Meter
9100760-01 - Long Logger System Trailer Only (no Meter)
9100910-71 - Long Logger 9150 System

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Short Logger System - 9101170

Designed for eight-bunk log trucks, our Short Logger systems (with corresponding electronics) provide gross or net weight for trucks and trailers. These SI On-Board solutions continue to set industry weighing standards with Double-Gaged Steel Shear-Beam load cells. Our easy-to-install and operate systems consist of load cells and mounted bearing plates to support the load.

9101770 - Short Logger System with 4 Ch 9100 QC Meter
9101170-50 - Short Logger 9150 System

Fifth Wheel Tractor Systems 

We’re proud to offer you the broadest selection of Fifth Wheel options in the industry! SI Wheel Logging systems are designed to fit under Holland, Fontaine, Simplex, or JOST fifth wheel plates, replacing the standard riser or slider brackets. Without substantially adding to trailer and tractor height or weight, our load cell provides you with immediate and precise weight measurements.

Canadian Systems >GO TO PAGE

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Trailer Weighing Systems

SI Air Suspension systems are in a league of their own. Center Hanger and Single Point (Trunnion) systems are available for spring suspensions. Air Suspension systems are ideal for use with nearly all tractor, trailer, and combinations provided by manufacturers. With each SI On-Board weighing system, we provide the industry’s best solutions for maximum safety, efficiency, and productivity. 

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Australian/New Zealand Systems >GO TO PAGE

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Interactive Digital Weighing

SI 9150 Digital Weighing monitors are available for use with On-Board Forestry systems. These easy-to-use, interactive meters take full advantage of the automotive CAN protocol, digital signal processing, and advanced graphic user interface (GUI). Specifically designed for use with our load cells and accessories, we offer you smarter technology for immediate increased productivity, efficiency, and safety.

Don’t wait to get on the road to maximum profits with SI game-changing weight monitoring solutions.  Check with your local dealer to upgrade your system today!

Canadian Systems >GO TO PAGE
Australian/New Zealand Systems >GO TO PAGE

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SI Custom Solutions

From Grapple-Arm Weighing systems, stress analysis in engineered wood products manufacturing, and force sensors for CLT/Mass-Timber construction, our Stress-tek brand provides custom solutions for virtually any industry application.

Stress-tek provides expert application analysis, mechanical sensor design and production, strain gage assembly, calibration, and testing. Our load cells are used in a variety of applications throughout numerous industries including:  Agriculture, Aerospace, Automotive, Medical, Off-Road Vehicle, Oil & Gas, and Transportation. Theoretical stress analysts make broad assumptions about best solutions. With Stress-tek, our expert analysts determine the best solution for YOU!

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Australian/New Zealand Systems >GO TO PAGE

>Get On-Board with the Leaders

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We rely on our SI On-Board Scales every trip to ensure that we maximize our loads.

Jake ThompsonTTT Timber, Inc.

We use SI On-Board Scales on our fleet of log trucks. Whether our trucks are running off road in harsh conditions or over the highway, the SI scales consistently provide accurate readings. We rely on our SI scales every trip to ensure that we maximize our loads. The majority of our haul routes pay by the ton so it is critical for us to maximize our revenue. Our SI On-Board Scales are very accurate, and our confidence in them has been proven through years of use. We have been pleased with how easy the scales are to use and adjust, and with their longevity in rugged conditions.