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.

Can SiloWeigh be installed on any type of silo leg? Not all. The leg must be able to accommodate the 4 inch square weatherproof box on both sides.  The best leg is of "H" or "I" beam  construction.  This section allows the boxes to be installed back to back in the centre of the symmetrical section, where cancellation of side forces and temperature errors is best. The popular "O" section legs can be accommodated by placing gauges on opposite sides and shaping the box surface to the leg for a watertight seal.  It is also possible to install gauges on "L" angle and "S" section legs but the compensation is not as good. Call us if you are unsure.

SiloWeigh will fit most legs but not all.  Ask us to be sure.

Is there any limit to the silo size or capacity? No.  The SiloWeigh gauges measure the stress in the metal.  Since the legs are sized to support the silo's weight without collapsing, there will always be a measurable stress.  For highest output and best accuracy, however, the legs should not be overdesigned, since too heavy a cross section reduces stress and the resulting output signal. If possible, measure and calculate the cross section area of the leg, then divide the total load (of contents) by the number of legs and then by the cross section of one leg.  If the resulting stress is greater than 1500 lb per square inch, there should be adequate output.

There is no practical limit to size or capacity but calculate stress to be sure.

Will it wear out in a few years? Not likely. Since SiloWeigh has no moving parts, the only reason for a breakdown is water leakage into one of the waterproof boxes.  Even so, the gauges are double protected with waterproof silicone and will withstand water for a considerable time.

SiloWeigh should last for many years when installed correctly.

How easy is SiloWeigh to install? It's not a piece of cake;  the strain gauges are small and you need a steady hand, but there are no large holes to drill or other heavy manual operations.  Also, if the installation is outdoors you need good weather.  Don't attempt to do it in the rain or in freezing temperatures.  The electrical skills are minimal;  if you have wired a VCR or stereo system you can do it.  Our instructions have been thoroughly tested and rewritten until all the likely problems have been eliminated.  Our phone help can give you peace of mind, however;  call us on your cell phone right from the silo.

You should have no problem but we're here if you get stuck.

Can I use SiloWeigh with my own weight indicator? Of course;  this is why we price it either with or without the indicator.  A full four leg SiloWeigh installation is equivalent to four regular 350 Ohm load cells, which can be handled by all but the most basic indicators.  If you are familiar with the indicator's calibration procedure there should be no problem.

Use your own indicator, but check that it can handle the total number of legs.

Can I use SiloWeigh to batch material out of my silo? It sounds attractive, but consider the error that you may get.  SiloWeigh is not an accurate scale and could drift by an unacceptable amount during your feed period.  Unless you are using it to check overloading of trucks that are filled in no more than a few minutes, we wouldn't recommend it.  An accuracy of 2% of full scale on a 100,000 lb silo is equal to an error of 2000 lb.  Over a few minutes the error should be less than this, but how much less?  There's no easy answer. 

Don't batch using SiloWeigh unless you can stand large errors.

Can I use SiloWeigh on a skirted tank or silo? Probably.  You will have to calculate the loading by dividing the total weight of contents by the cross sectional area of the skirt (take the circumference and multiply by the wall thickness). If the result is greater than 1500 lb per square inch, no problem.  If it is slightly less, you may be able to cut some slots to reduce the cross section and install the gauges between them.  Do not expect the stability of a leg installation, however.

More difficult than a leg installation, but possible.

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