Month: November 2021

Why should you attach the probes to the silo’s floor?

Sonda atada al suelo del silo
Sonda atada al suelo del silo

It is clear that the higher temperatures inside the silo, the greater chances of developing fungi, insects and, of course, lower quality of the grain. 

For this reason, proper monitoring of the temperature inside the silo is key to good control of the cereal, since it allows us to react quickly to any unforeseen event that may affect its quality.

In this sense, in order to guarantee the quality of the grain, it is necessary to use a temperature monitoring system such as the one offered by Gescaser.

In addition, the placement of the temperature probes is crucial. If the installation of the probes is not carried out correctly, it will be difficult to control the condition of the stored grain.

Why is it important to attach the probes to the silo’s floor?

To correctly measure the temperature of the silo, you must ensure that probes do not move. Why? 

If a probe is not attached to the ground, during filling, it can move to the side and end up touching the wall of the silo, affecting the temperature reading.

Let’s look at an example. 

The following image corresponds to an aerial view of a silo with the location of each probe:

Vista aérea de un silo

Next, we are going to analyse three graphs over two months of data belonging to probes nº4, 5 and 6. 

The graph in Image 1 shows the data from probe nº6. As we can see, at the beginning of August the silo was full because measurements from all probe sensors are stable, regardless of the ambient temperature (in black).

On the left side of Image 1, there is a vertical probe with the arrangement of the sensors inside the silo: the upper sensor is grey and the lower sensor is red.

Following the graph, we can see that, some time later, the temperature of the upper sensor (grey) varies in the same way as the ambient temperature. The measurements of the green and yellow sensors also change accordingly: the silo begins to empty.

Sonda S2 -6
Image 1: Probe nº6 (S2-6)

Analysing Image 2 (probe nº4) we find a similar behaviour to the previous one.

Imagen 2: Sonda S2-4
Image 2: Probe nº4 (S2-4)

Remember that, as a rule of thumb, a silo empties evenly. Therefore, taking into account the first two graphs, we could deduce that probe 5 would show a similar trend. However, this is not the case.

Imagen 3: Sonda S2-5
Image 3: Probe nº5 (S2-5)

According to Image 3 (probe nº5), all sensors are in line with the ambient temperature.

So, why aren’t the three graphs showing the same?  

This is where the clamping of the probes comes in. In fact, probe nº5 is not capturing the real temperature of the grain, but rather the outside temperature of the silo. 

When filling the silo, if the probe is not attached to the ground, the force of the grain inflow moves the probe towards the wall of the silo and this directly affects the actual reading of the grain temperature.

How to attach a probe to the silo’s floor?

We have seen the importance of holding the probes so that the cereal does not displace them. However, how are these probes attached to the silo’s floor?

To prevent the probes from moving at the time of filling, Gescaser supplies special clamping kits that do not damage the grain sweeping nor extraction systems.

Kit de sujeción

In summary, these kits are essential to allow obtaining real data of grain temperature. For this reason, always remember to attach the probes to the ground before filling. 

For more details on clamping systems, please contact our team.