SiloWeigh Sensors

SiloWeigh tells you the contents of any silo, feed bin, tank or storage vessel as a continuous inventory value. Better than silo level measurement, SiloWeigh measures the actual weight of the vessel and contents to give a true picture of the amount on hand, and it costs less than the best level sensors.
For low cost vessel and silo weight display, you can’t beat the value of SiloWeigh Basic. Designed for farm feed bins and similar applications where a very basic display is adequate. SiloWeigh Basic uses L-Strain sensors with a simple weight indicator to show the current weight of the vessel contents, without all the extra features.
SiloWeigh II Pro pairs the L-Strain sensors with a touch-screen display, to measure silo level by weight. Capacity is 6 vessels displayed as bar-graphs or a trend-graph of each individual vessel. A special display shows weights of past deliveries to detect shortages.
SiloWeigh.Net pairs the L-Strain sensors with a computer-based display, giving capacity for 32 silos displayed as bar-graphs or a trend-graph of each individual silo. Any computer on the local network can view the silo or tank inventory using a web browser and a cloud-based database displays all the company’s vessels through the Internet.
Most silos on legs and skirted silos use the L-Strain silo weight sensor. However, SiloWeigh can use pressure sensors to measure liquid level, load cells for high accuracy and weldable gauges for special applications.SiloWeigh II can also use any 4-20 mA analog sensor, allowing you to gain more value by recording temperature or moisture values.
The L-Strain silo weight sensor compensates for the expansion of the underlying metal, making it extremely stable on steel legs and skirts as well as being applicable to aluminum and stainless steel silos.
SiloWeigh vessel inventory systems are self-install kits. You can do it yourself from scratch, and we provide the critical tools. Read on and see how simple it really is, or ask for our installation training presentation. If you wish, we can do it all for you; just call us.
Can SiloWeigh be installed on any type of silo leg? Is there any limit to the silo size or capacity? Will it wear out in a few years? How easy is SiloWeigh to install? This page answers these questions and others.

L-Strain, Advanced Silo Weight Sensor

Gives accurate measurement on silo leg or skirt with little change as the structure heats and cools.  A stress sensing section measures the compression due to weight and a compensating section corrects the errors due to thermal expansion in the structure.

SiloWeigh L-Strain silo weight sensor
Silo Weight Sensor can be applied to steel, aluminum and stainless structures . . . Read more
  • Typical accuracy ±1 to 2% of full scale when all four legs are gauged.
  • Mount with bolts through holes drilled in the leg on its neutral axis, where you do not weaken the structure with these holes.
  • On round legs, weld flat surfaced tabs in place as sensor mountings.
  • All-weather.  Sensors, wiring and junction boxes meet NEMA-4, IP66.
  • Connect by cables and junction boxes to the DJB (digital junction box).
  • Single digital cable from all silos to an indoor location up to 1 km (3000 ft) away.
  • Radio connection when it is difficult to run cable.
  • Download Stress calculator Excel file to ensure that the stress is adequate.

Liquid Level Sensor

Allows you to use SiloWeigh on tanks.  The combination of a pressure sensor and SiloWeigh indicator can show either the level in the tank or the volume in gallons, liters etc.  It is important that the tank is symmetrical in the vertical direction.  As a result, accuracy is excellent.

SiloWeigh tank pressure sensor
Attach to a T-adapter in the main outlet pipe or, preferably, in a spare outlet which does not have any flow to affect the pressure . . . Read more
  • Submersible version is available when T-adapter cannot be used.
  • High accuracy, typically 1/2 to 1%.
  • The expansion of the liquid with temperature does not affect the reading.
  • Additional equipment necessary for petrochemicals and other combustible liquids.
  • Up to four sensors to one DJB for SiloWeigh.Net.
  • Up to two sensors with SiloWeigh II Pro at no extra cost.
  • Low-cost addition to SiloWeigh II or SiloWeigh.Net, easy to justify.

View videos and download brochures

Load Cells for Highest Accuracy

To give the ultimate in accuracy, use load cells, the ultimate weight sensors, under the silo or vessel.  Shown here is a shear beam load cell assembly which can support the leg of a silo. These are an economical replacement for the L-Strain sensor for silos of 30 ton and less.

Tank Mount Assembly is used for smaller silos up to 30 tons capacity
When accuracy is more important than minimizing cost , or for low capacity silos (up to 30 ton) . . . Read more
  • Typical accuracy ±0.02 to 0.1% of reading when all legs are mounted on load cells.
  • Can cost less than the L-Strain sensors for lower cpacities.
  • Load cell mounts are available up to several hundred tons per leg.
  • You need to lift the vessel in most cases, in order to fit these load cell mounts.
  • Alternatively, you can stabilize the silo while cutting the leg to fit a new bottom plate and the load cell mount.
  • Connect up to 8 load cells to the DJB’s four inputs.

Load cell is the ultimate weight sensor, giving accuracy of better than 0.1%

General information and SiloWeigh display choices, Click Here

Temperature Recording

Connect our TempTron temperature probe and start recording temperature of your mix.  Add it to your batch reports to gain insight into concrete curing problems, or just monitor the temperature of your product inside your silos.  Adding temperature to SiloWeigh II or SiloWeigh.Net is easy, costs very little extra and improves your ROI.  Or anything else that needs recording and has an analog sensor.

Weldable Gauges

For special applications, use the original SiloWeigh silo weight sensor when bolt-on sensors cannot be used.  Examples are where there is lack of room or other physical limitations.

SiloWeigh weldable gauges
These sensors require surface preparation for their application . . . Read more
  • Accuracy slightly better than the L-Strain sensors, depending on the application.
  • Requires special care, good eyesight and a steady hand during welding.
  • Two levels of waterproofing – silicone gauge covering plus outer plastic shell.
  • Rent the special spot-welding gun with needle tip by the week.
  • Apply the gauges to front and back of each leg.
  • Uses standard DJB and digital cable to indicator.

Moisture Recording

Add an AquaSense 2280D moisture sensor to record changes in your aggregate moisture over the production day – if you have a concrete plant, that is!