- In-house engineering and production
- Short lead times
- Worldwide delivery
- More than 20 years of experience
Why choose a BoltSafe sensor instead of a strain gauge sensor?
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Our bolt load sensors measure the bolt load across the entire surface of the ring instead of a few pressure points.
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Calibration is done once inside the sensor, absolutely no calibration is needed at the side of the readout equipment. Not even when switching between readout methods.
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BoltSafe sensors are usable with very low and very high loads from 18 kN to 3000 kN. Because of this, the chance of overloading is lower than when using a strain gauge sensor.
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The signals our sensors send out are digital. They can be converted to an industrial standard when some of our readout methods are used.
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BoltSafe sensors have almost no creep effect and are drift free. We assure a maximum deviation of 1% of the full scale after factory calibration.
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Our sensors meet the IP66 rating and are therefore dust free and water resistant.
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To accommodate various wishes, situations and applications, we offer different types of readout methods.
Bolt load sensors
BoltSafe bolt 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 and the IoT-node.
Bolt load sensors
BoltSafe bolt 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 and the IoT-node.
What is a strain gauge sensor?
A strain gauge sensor (also known as strain gauge, strain gage or strain gauge load cell) is a sensor which can measure strain on objects. Force is converted into a change in electrical resistance which can then be measured by the sensor. When the strain gauge sensor is attached to an object by an adhesive, the metallic foil on the back will deform, resulting in this conversion. The change in resistance is related to the strain by the quantity known as the gauge factor. The applied force varies its resistance, because applying external forces to a stationary object results in stress and strain. There are different kinds of strain: tensile and compressive strain. Therefore, strain gauge sensors can be used to pick up expansion as well as contraction. The strain gauge sensor was invented by Edward E. Simmons and Arthur C. Ruge in 1938.
Contact us for more information or to order our load sensors
BoltSafe as an alternative to strain gauge sensors
Strain gauge sensors are well known and widely used in the market, but BoltSafe sensors use a different technology. They use magnetoelastic technology and therefore measure change in the magnetic field. This makes the BoltSafe sensors more compact (low clearance) and less expensive than strain gauge sensors. Our load sensors are designed to measure and monitor the bolt load in various bolted joints. Knowing the bolt load enhances safety, makes the joints more dependable and gives better control over the bolted construction.
Our sensors are used as washers, so they are placed on the non-driven side of a bolted connection, preferably under a nut. While tightening the bolt, the BoltSafe washer deforms minorly because of the applied force. The sensor measures the changes in the electrical resistance caused by these deformations, which is the main difference with strain gauge sensors. This is the data we use to determine the bolt load at any given moment.
Are you interested in using or distributing our bolt load 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.