Originally designed and developed in the Pacific Northwest for the timber industry, S.I. On-board scales have since become the standard for quality and durability. With the broadest range of solutions in the industry, we have the right fit for all of your weighing needs.

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Dump Truck Systems

Designed for both on and off-road applications our rugged shear pin load cells in the rear hinge assembly and our hydraulic sensor for the front lift cylinder provide the tools to optimize your load.

Our Dump Truck: weighing systems typically provide accuracy within 1 % of gross vehicle weight. Our in-cab meter displays gross vehicle or net payload weights and alerts the driver to unsafe or overloaded situations.

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>View Spec Sheet  Shear Pin Sheet
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End Dump Trailers

S.I. On-board offers a wide variety of weighing systems for end dump trailers whether they have spring, air or mixed suspensions. For trucks and trailers with air suspensions, we use our all-digital air pressure sensors. Trucks equipped with spring suspensions use either shear beam load cells, fifth wheel load cells, or hydraulic pressure sensors. Trailer solutions include a trunnion load cell in the suspension or shear pins at the tipping point.

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Cement Mixer Solutions

SI On-board offers both single point and three point solutions for a wide variety of cement mixers. Measure the full or remaining payload. Reliable and easy to use. Improve Safety_ Monitor Buildup.

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TUFFER Front Loader Scale Solutions

TUFFER Weigh In Motion Loader Scales will provide the information needed to load maximum weights faster, and keep trucks moving without going to a central scale location. This means you get increased productivity on every load, every day, On-Board scales make it faster to load accurate weights every time and TUFFER is designed to do the job and survive the rugged environments found in refuse environments.

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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.