Mechanical Sensor MS-4 - Onboard Truck Scales | TruckWeight


Mechanical Sensor MS-4

Smart Scale mechanical sensor is new and better way to weigh mechanical suspension systems. The wireless sensors make the onboard scale versatile, accurate, affordable, simple do it yourself way to eliminate overweight fines, check weighing fees, out of route miles, and increase productivity by reducing time re-working loads. Smart Scale also eliminates complicated installation, maintenance, and downtime associated with hardwired onboard scales.

Based on strain in your vehicle’s suspension system, Smart Scale calculates axle group weight and gross vehicle weight measurements that are accurate within 1-2% and works well on uneven surfaces making very effective for off road applications like logging and aggregates. With our dual point calibration process you will never be wondering again how accurate you are when leaving a job site.

Because it’s wireless, Smart Scale lets you monitor gross and axle weights from up to 500 feet (155 m) away: inside the cab, on the loader, or wherever it’s safe and convenient.

Features & Benefits

  • Maximize payload, improve productivity
  • Eliminate overweight violations and time spent redistributing loads
  • Quick, simple installation: no special tools or skills
  • 500-foot (155 meter) wireless range
  • Low-powered radio signal make Smart Scale intrinsically safe
  • Accurate to within 1-2% of actual gross vehicle weight
  • 2-year warranty
  • Waterproof, Weatherproof, Shock-resistant, Non-corrosivehousing requires no regular main use AA batteries for power

Optional: Can order hardwired sensors that connect to power supply of truck and trailer, sensors are still wireless with no connection between truck and trailer and between sensors and display.


Ideal for spring suspension trailers, dump trucks, refuse trucks, Class 4, 5, 6, 7, and 8 commercial trucks, tractor trailers and fleets with air or non-air suspension who want a simple, accurate way to meet payload targets, load efficiently, and eliminate overweight violations. Key industries: refuse/waste/scrap, steel, agriculture, asphalt, aggregates, forest products, containerized freight, liquid and dry bulk products, heavy off road mining trucks etc.


Smart Scale is the simplest scale on the market to install and least expensive to acquire and maintain. The Smart Scale consists of the Truck Weight strain gauge which gets mounted on the axle or spring, a simple wire harness connects to the Smart Transmit ter which transmits real time data to the wireless handheld. Installation typically takes 60 minutes per axle group for a standard steer, drive and trailer axle configurations. Visit our website under “Manuals” and watch our detailed installation video for Mechanical suspension.

Durable Weight Control Device lets you monitor Axle Group weights and gross weights from inside and outside the vehicle.

The Smart Scale sensor for air suspension is durable and completely non corrosive.

Mechanical Suspension Sensor MS-4 for Spring Trailers and Drive Axles with Walking Beam, Spring or Chalmers Suspensions.