Safemount
Weighing assembly for silos, tanks and bunkers
We work with you to optimise the design for weighing your silos
Immediate advice: +49 (0) 29 61 – 96 56 86
The added value to you
Comprehensive
Compact
Durable
Explosion protection
TÜV & EN 1090 approval
Simple
High-quality
Cost-effective
Available option
Why is the Safemount module the right choice for my plant?
With the benefit of our many years of experience we assist you in selecting the optimum weighing module for your application.
+49 (0) 29 61 – 96 56 86
You are probably familiar with the following situation:
You require reliable content measurement for a silo, tank or mixer.
You would like to be able to load trucks from your silo with good accuracy or to ensure that the silo truck ordered will still fit into the silo.
Raw material consumption or production output has to be monitored to optimize the procurement of raw materials.
The environment is dusty, corrosive or damp. The weighing system must be reliable and maintenance-free and must offer high precision and long-term stability.
The ideal solution:
The compact Safemount weighing assembly is ideal for silos of between 4 t and 600 t.
The module can be easily screwed between the silo support member and the substructure. It secures the vessel in all axes, while allowing a certain amount of expansion due to heating or to the temperature of the material.
Because of its simplicity in assembly, it can be installed by the silo constructor.
The Safemount assembly is largely resistant to vibration, dust, humidity and corrosion.
Upon request, we will gladly send you a series of information about our products, starting with the access to our data sheets.
How does the Safemount work?
The Safemount loading assemblies are easy to install – on request we also provide load cell „dummies“ to replace the “life load cells” during the mounting procedure. Once the silo has been installed, the dummies can easily be replaced by the “Life load cells”. The Safemount assembly is equipped with integrated rods and stay bars. This makes the assembly largely insensitive to transverse forces, but nevertheless allows a small amount of thermal expansion.
Dummy load cells can also be installed when constructing the silo and they can subsequently be replaced by genuine load cells. This saves costs in the construction phase, while making it possible to retrofit precision load cells in the operational phase.
The ingenious design of the Safemount weighing module offers a safe, precise, economically-priced weighing system for large silos, mixers and tanks. No additional rods and stay bars are required (forces have to be approved by a static engineer).
The double-ended shear beam secured in high-tensile bolts ensures the take-up of high transverse forces and thermal expansion. The upper mounting plate adapts minimally to the support bracket or footplate of the silo. The particularly interesting features of the Safemount and Baby Safemount modules are their low total height and simplicity of mounting. The weighing modules of 2,000 kg to 40 t are equipped with an integral built-in overload protection.
So that you can undertake cost-effective level measurement based on weight, in conjunction with the Safemount and Baby Safemount modules we offer counter bearings or dummies of the same total height. On request we also supply, free of charge for 4 weeks, „dummies“ to protect the load cells during mounting and welding operations.
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Technical data
Measurement ranges:
2,000 kg, 5,000 kg, 10,000 kg,
15,000 kg, 20,000 kg, 30,000 kg,
40,000 kg, 50,000 kg, 60,000 kg,
80,000 kg, 100,000 kg and 150,000 kg
Total height:
5,000 – 30,000 kg = 130 mm
40,000 kg = 145 mm
50,000 – 60,000 kg = 220 mm
80,000 kg – 150,000 kg = 280 mm
Supply:
5-12 VDC, max. 15 V
Output signal:
2 mV/V
Linearity error:
within 0.05%
Hysteresis:
within 0.05%
Reproducibility:
within 0.05%
Overload protection:
150% of the nominal load
Output resistance:
700 Ohm
Working temperature range:
-35°C to +80°C
Compensated Range:
-10°C to +45°C
Insulation resistance:
> 2000 MOhm
Ex approval [optional]:
ATEX II 1 GD EEx ia IIC T6
ATEX II 3D EEx tD T85°C
We are delighted to offer personal assistance with your planning
Uncomplicated, individual and practice-oriented
Frequently asked questions
What is the difference between a weighing assembly and a load cell?
A load cell is the actual element, which measures the force. Standard load cells consist of a metallic body, which is deformed in a defined manner by the force applied.
The deformation is usually measured by metal DMS affixed to the cell and converted into a voltage signal. For small to medium forces bending or shear beams are usually used.
For larger forces as a rule cylindrical bodies or double-ended shear beams are used. When the load cell is loaded with a defined force, it emits a signal, which is proportional to the force (mV/V).
The weighing assembly´s function is to introduce the force into the load cell in the required direction. In the case of containers, the assembly´s function is to secure the container to the load cell and to prevent tilting.
In this way, the accuracy of the load cell should not be impaired, or should be only very slightly impaired. Some weighing modules have additional integral transport, installation and overload protection.
Irrespective of the accuracy of the load cell, the assembly is of primordial importance for the system accuracy of the weighing process.
On how many load cells may a silo, vessel or container be placed?
What advantage does the Safemount module have over cylindrical load cells?
What are stay rods?
What is an anti-lift-off device?
An anti-lift-off device on silos and containers is used, for example, if wind loads or seismic loads have to be taken into account and there is a risk that the silo or the container may tilt over. In the case of wind, for example, in particular when the filling level is low, in relation to the weight of the silo the wind-exposed area is large, and it is then that the risk of tilting is greatest. There are weighing modules with integral anti-lift-off devices and others with separate anti-lift-off devices.
Integral anti-lift-off device:
The anti-lift-off device prevents the silo or container from tilting. The Safemount and Baby-Safemount weighing assemblies, which are used for silo weighing, have integral anti-lift-off devices. The top and bottom mounting plates in the assembly are connected to the load cell by bolt connections. In this way, the assembly compensates a certain expansion (e.g. caused by different thermal coefficients between steel and foundation materials) of the overall structure and also limits the distance that can occur in the case of a lifting silo.
Additional anti-lift-off device
An additional anti-derail device is frequently used for load cells which do not have integral anti-lift-off devices. In this system, the anti-lift-off device can be attached to the load cell itself or directly to the silo or container. When statically required for the Safemount weighing assembly up to 40 t, additional anti-lift-off device, which are attached directly to the weighing assembly, are available. In this version, two vertical threaded rods are screwed into the bottom mounting plate. Each of these protrudes through a drilled hole in the top mounting plate without touching the plate. The maximum withdrawal distance is limited by a nut above the top plate at 2 – 3 mm and additionally secured by a lock nut.
Are additional anti-lift-off devices needed with the Safemount weighing assembly?
What effects do wind loads have on accuracy of weighing?
How far from the load cells may the measurement amplifier be located?
All „modern“ measurement amplifiers have what is known as a „sense“ input. In standard load cells only four conductors are required for measuring. These are two conductors for the supply (5 – 15V) and two conductors for the measurement signal.
If the measurement amplifier is located at a distance of more than 10 m, we recommend two additional conductors for the „sense“ line. The measurement amplifier „measures“ through the sense line how much voltage is dropped in routing and mathematically compensates for the voltage drop.
Where there is sufficient wire cross-section and separate transfer of the shielded connecting cable, distances of up to 200 m are feasible. For greater distances, we recommend the use of an amplifier on site at the silo or a bus connection via the Intelligent Junction Box.
