- In-house engineering and production
- Short lead times
- Worldwide delivery
- More than 20 years of experience
The benefits of magnetoelastic sensors
Usually, the torque produced by rotating equipment is determined either mathematically, based on the amount of current being drawn or using strain gauges. However, calculated values are not exact representations of real-world results. Strain gauges also require precise mounting and calibration to ensure accuracy. A magnetoelastic sensor uses a simple, low-cost technology that uses non-contact sensing to provide accurate torque measurements. Because they use non-contact sensing, magnetoelastic torque sensors don’t suffer from mechanical wear. Therefore, they have a very long operating life. Another benefit is that the magnetoelastic properties are highly reliable and don’t degrade.
Why choose a BoltSafe magnetoelastic load cell?
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Because magnetoelastic technology is used, the BoltSafe load cells are more compact and less expensive.
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The bolt load is measured across the entire surface of the ring instead of using just a few pressure points.
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Because we calibrate inside the magnetoelastic sensor, there is no (re)calibration needed at the side of the readout equipment, not even when switching methods.
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The sensors send out only digital signals and can withstand very low and high loads from 18 kN to 3000 kN.
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Our load cells are drift free and have almost no creep effect. We assure a maximum deviation of 1% of the full scale after factory calibration.
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Our magnetoelastic torque sensors meet the IP66 rating, making them dust free and water resistant.
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A variety of readout methods is offered to suit many wishes, situations and applications.
Bolt load sensors
BoltSafe magnetoelastic load cells are specially designed to monitor the bolt load in bolted joints. Knowing this information enhances safety, makes joints more dependable and results in better control over bolted constructions.
Readout methods
BoltSafe bolt load cells can send their data to different readout methods. We offer the following: the Handheld Reader, Network with PDI, Network with PDI-NT, RS-232 and Analog Converter, the IoT-node and BLE-node.
Bolt load sensors
BoltSafe magnetoelastic load cells are specially designed to monitor the bolt load in bolted joints. Knowing this information enhances safety, makes joints more dependable and results in better control over bolted constructions.
Readout methods
What is a magnetoelastic sensor?
Emilio Villari, an Italian physicist in the 19th century, discovered that if a form of mechanical stress is applied to a ferromagnetic material, a change in the magnetic flux occurs. This could either be torque or force. This phenomenon is commonly known as the magnetoelastic effect, also called the Villari effect. Using this magnetoelastic effect, a magnetoelastic sensor can measure two different forms of stress. The first one is force, this is when stress is applied in a linear manner, which compresses or elongates the sensor element. The second one is torque, this is when stress is applied in a twisting manner. Magnetoelastic sensors are not only capable of measuring torque and force, but can also be used for measuring load, direction, position, angle and speed.
Contact us for more information or to order our sensors
How does our magnetoelastic sensor work?
BoltSafe magnetoelastic sensors are specifically designed for measuring and monitoring bolt load in bolted joints, as well during assembly as over time. Knowing the bolt load enhances safety in structures, gives better control over the bolted construction and makes joints more dependable. A BoltSafe magnetoelastic load cell measures the changes in the magnetic field using magnetoelastic technology. The sensor is applied on the non-driven side of a bolted connection, preferably under a nut. When the bolt is tightened, there are forces being applied to the sensor. This will result in minor deformations of the stainless steel washer. The changes in the electrical resistance that occur because of these deformations, can be measured. We use this data to determine the bolt load very precisely at any moment.
Our sensors can be used for other applications besides measuring bolt load. Other loads, forces and weight are also possible. For example, our magnetoelastic sensors are used for Structural Health Monitoring and in temporary constructions. Here they make sure that the constructions don’t collapse. In our product range two sensors can be found, the CMS and CMS-NC. We offer both in a regular version and a stronger version that can withstand 15% more load while keeping the same compact dimensions.
Are you interested in using or distributing our magnetoelastic sensors? Please contact us through info@boltsafe.com or call us at +31246790797. If you have any questions about the functionality, usability or applicability of our products, do not hesitate to contact us.