Sensor to read silo level in tonnage

I have a 15 meter cylindrical silo with a radar sensor configured to read silo level in percentage, after a few months, I have been asked to reconfigure this sensor to read the silo content in Tonnage, pls is there any solution to get silo levels sensor read tonnage? Any sensor recommended will be fine?
 
Converting to different engineering units is usually the role of the receiver device, a panel meter/HMI/PLC/DCS.

I presume that this level device has an output, like a 4-20mA output representing the level in percent.

Feed that 4-20mA signal into a panel meter (or your programmable receiver) and scale the panel meter according to the weight in tons at the 100% of level.

When 100% of the level = 2,387 tons, 1% = will read out as 23.87 tons and all other level points proportionally, within the accuracy of your measurement.
 
Converting to different engineering units is usually the role of the receiver device, a panel meter/HMI/PLC/DCS.

I presume that this level device has an output, like a 4-20mA output representing the level in percent.

Feed that 4-20mA signal into a panel meter (or your programmable receiver) and scale the panel meter according to the weight in tons at the 100% of level.

When 100% of the level = 2,387 tons, 1% = will read out as 23.87 tons and all other level points proportionally, within the accuracy of your measurement.
Thanks, but I use Siemens Sensor LR560 radar
 
You don't climb the 15m silo to read the level in tons from the LR250 display readout, do you? Don't you want the level readout in tons down at grade level where human beings walk and talk?

The LR560 is a loop powered 4-20ma HART level transmitter. The display on the LR560 can be level/distance or volume but not mass/weight. But that doesn't matter because the 4-20mA signal can be interpreted for whatever units you want.

Assuming that you have the 4-20mA LR560, all you need is a loop powered meter to convert the 4-20mA signal to an inferred weight/mass output in tons. The Precision Digital 6700 Vantage is loop powered meter (runs off the 4-20mA loop power and it can display units (TONS) on the 2nd line so that there's no confusion as to what the units are.

Vantage loop powered plastic enclousre 2.JPG
 
You don't climb the 15m silo to read the level in tons from the LR250 display readout, do you? Don't you want the level readout in tons down at grade level where human beings walk and talk?

The LR560 is a loop powered 4-20ma HART level transmitter. The display on the LR560 can be level/distance or volume but not mass/weight. But that doesn't matter because the 4-20mA signal can be interpreted for whatever units you want.

Assuming that you have the 4-20mA LR560, all you need is a loop powered meter to convert the 4-20mA signal to an inferred weight/mass output in tons. The Precision Digital 6700 Vantage is loop powered meter (runs off the 4-20mA loop power and it can display units (TONS) on the 2nd line so that there's no confusion as to what the units are.

View attachment 608
Ok,thanks, will check on this meter
 
If the density is always the same, and you never change that, you can make a calibration for the sensor with a few known loads of the silo.
You can for example take a Pro-face GP4116 touchpanel with a RKC Instrument SRZ TIOB module with 4-20mA input. They are interconnected with Modbus RTU. In the GP4116 you make a flexible script with adjustable settings for the calibration. You also make a script over there (Gscript or Dscript) that converts the 4-20mA signal (which comes out of the module with a value of 4mA=0% and 20mA=1000=100.0%). 100.0% signal is a fully empty silo and 0% signal is a full one.
But remember something very important when it is powder material (not with fluid):
When the silo is emptied there is always a cone on the inside, so when you let the radar measure in the center there is a possibiliy that it measures too low. Therefore it is important to let the radar look down into the silo not from the center for somewhere near the sides. But there is the problem that sometimes something sticks to the sides and the radar accidentally sees that clump of material. For that often knockers are installed on a silo for powder material, that knock during dosing.
Another solution you can consider, is putting a load cell under the legs of the silo, and really measure the weight.
What is also often done, is putting a inline weigher in the transport to the silo's. This weigher weighs the material before it is transported to the corresponding silo. You see that often in factories for animal feed. This weighing is done on a batch basis with bulk weighers.
 
If the density is always the same, and you never change that, you can make a calibration for the sensor with a few known loads of the silo.
You can for example take a Pro-face GP4116 touchpanel with a RKC Instrument SRZ TIOB module with 4-20mA input. They are interconnected with Modbus RTU. In the GP4116 you make a flexible script with adjustable settings for the calibration. You also make a script over there (Gscript or Dscript) that converts the 4-20mA signal (which comes out of the module with a value of 4mA=0% and 20mA=1000=100.0%). 100.0% signal is a fully empty silo and 0% signal is a full one.
But remember something very important when it is powder material (not with fluid):
When the silo is emptied there is always a cone on the inside, so when you let the radar measure in the center there is a possibiliy that it measures too low. Therefore it is important to let the radar look down into the silo not from the center for somewhere near the sides. But there is the problem that sometimes something sticks to the sides and the radar accidentally sees that clump of material. For that often knockers are installed on a silo for powder material, that knock during dosing.
Another solution you can consider, is putting a load cell under the legs of the silo, and really measure the weight.
What is also often done, is putting a inline weigher in the transport to the silo's. This weigher weighs the material before it is transported to the corresponding silo. You see that often in factories for animal feed. This weighing is done on a batch basis with bulk weighers.
Thanks so much.
 
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