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 weighing bins
SiloWeigh II Pro

Scale-Tron’s SiloWeigh II Pro, your go to source when you need to know how much material you have in your silos.

SiloWeigh II Pro inventory monitoring system provides inventory insights at your fingertips, allowing you to reconcile inventory quickly and efficiently keeping your business on the right track. Our PLC and touchscreen connects locally to give a true picture of the amount on hand. Raw materials are an expensive commodity and so is the cost of running out of material or returning it because of discrepancies in your inventory, which negatively impacts profitability. This is where Scale-Tron’s SiloWeigh II Pro can help, by proactively tracking your inventory to prevent such costs. Our systems can be found throughout the cement, powder, plastics and food industries, in virtually every type of silo.

How Scale-Tron’s SiloWeigh II Pro benefits your operations:
  • No need to empty silo or shut down plant for installation.

  • Touch screen requires only a single digital multi-drop cable to all vessels.

  • Eliminate the need for climbing silos to measure levels.

  • No moving parts for longevity and reliability.

  • Check every fill against delivery slip. History is saved and graphed allowing you to check them against the weight tickets to identify and eliminate potential errors.

  • Display mounts indoors and can be any distance from silos.

  • Any choice of units: imperial, metric tons, KLB.

  • 3.5" touch screen include alarm outputs.

  • Local hard wired programmable alarms can sound horns, illuminate warning lights or operate pinch-off valves.

  • 2 inputs and 2 outputs standard, 4-20 mA.

  • Designed and manufactured in North America with parts available from stock.

The silo or bin weight is shown by a bar-graph and you can touch this to see a trend graph that measures deliveries
SiloWeigh II Pro's cabinet and touch screen are dust and splashproof for use in rough environments
  • All silo capacities can be measured. The limitation is the stress in the support structure. Acceptable stress is in the range 1500 to 15,000 lb per square inch.

  • All types of steel, stainless steel and aluminum. 

  • Up to 48 sensors can be powered from each SiloWeigh II display cabinet. 

  • 3.5" and 5.7" (89 and 145 mm) touch screen shows 6 bar graphs for up to 6 vessels, plus digital display of % full and weight or volume. 

  • External Android devices communicate with the display unit by WiFi radio, through a wireless router, giving the same resolution and features as the main display unit. 

  • Digital transmission from vessels; overall accuracy of digital section 0.1%. 

  • Dependent on structure being measured. Typically ±2% of full scale value for legged silos and ±5% for skirted silos 

  • 2 isolated outputs, continuous or multiplexed to include all vessels. 0-20mA, 4-20mA, 0-10V, 12 bit. 

  • 2 inputs 0-20mA / 4-20mA 13 bit, 2 inputs thermocouple temperature. 

  • 6 transistor 'sourcing' outputs, 24 VDC, 300 mA, fully programmable as audible (pulsed) or continuous alarms activated by any combination of 4 levels for each vessel. 

  • 10 transistor outputs as above, 22 inputs as below, in place of analog I/O. 

  • Converts outputs to isolated dry contacts, 5A at 250 VAC and inputs to isolated relay coils, 110 VAC standard, 24 V AC/DC or 220/250 VAC optional. 

  • 8 inputs 24 VDC, act as Audible and Master alarm cancel or programmable inputs to display warning messages: example - used with silo overpressure switches warns that filters are blocked. 

  • 110-250V AC, 50 W max. Solar power also available. 

  • Sensors: -40 to +70°C (-40 to +160°F). Display: 0-50°C (32-120°F). 

  • ABS plastic, chemical resistant, NEMA-4X. 

  • Regular cabinet holds touch screen, power supply and optional I/O relays, 13"x 13"x 8"deep (330 x 330 x 203 mm). 

  • CE, UL and CUL 


Level measurements drop due to compaction, however weight-based inventory measurement provides a consistent reading of what is actually in the vessel, regardless of material build up or distribution. Vessel conditions, like rat holes, cascading or bridging, do not affect the measurement. Unlike level measurement, our sensors have no contact with the material as they are bolted to the vessel’s legs or skirt.

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