Strain Sensor from Montronix
Stresses in machine structures often lead to damage or failures. At Montronix, we detect these risks at an early stage. Our StrainLink250-DA strain sensor measures the smallest strains directly on the surface and is ideal for applications with dynamic loads, for example when the spindle starts up slowly at low feed or the wrong direction is programmed in the process.
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Strain Sensor StrainLink250-DA: Technical Data
The StrainLink250-DA measures surface strain directly on the machine structure. It detects stresses at an early stage and protects processes from damage. The integrated strain gauge foil converts the smallest material deformations into an analog signal. The sensor is suitable for static and dynamic applications, regardless of machine type.
Product Advantages of the Strain Sensor
- Compact size with full performance
The sensor is only 69 millimeters long and fits even on narrow surfaces directly on the machine. - Robust housing for industrial use
The nickel-plated steel housing provides long-term protection against dust, moisture, and machining fluids such as oil or emulsion. - Maintenance-free and durable
No active component in the sensor means maximum stability and reliability for years. - Direct integration possible
Thanks to standardized mounting and M12 connector, integration is possible without special modifications. - High measurement accuracy even with vibration
The measuring bridge provides stable signals even on vibrating or dynamically loaded machine components. - Independent of control or machine manufacturer
The sensor works with all common evaluation units and can also be easily integrated into older systems.
How Our Strain Sensor Works
The StrainLink250-DA measures strain directly on the surface of machine parts. The integrated measuring foil changes its electrical resistance as soon as the material stretches or compresses. This generates an analog voltage signal that precisely reflects the strain. You evaluate this signal with an evaluation system and immediately detect when loads occur outside the normal range. This way, you continuously monitor critical machine areas and can intervene specifically if necessary.
Contact us nowHow Our Strain Sensors Optimize Your Production
Avoid damage through early warning
The sensor detects even the smallest stresses in the material and immediately reports them to the system. This allows protective mechanisms to intervene before cracks, tool damage, or other expensive consequential damages develop.
Production without unwanted interruption
The measurement runs continuously in the background and reliably documents all strain curves. Deformations or material overloads are no longer overlooked and no longer lead to unplanned stops.
Make maintenance plannable
The sensor provides precise trend curves over long periods, from which critical trends can be identified at an early stage. This allows you to plan maintenance specifically instead of reacting to spontaneous failures. This can be excellently expanded with a Pulse Plus sensor to evaluate in even more detail and plan maintenance even more precisely.
Relieve operators
The monitoring works independently of the operating personnel and reacts automatically to deviations. This reduces the probability of errors in shift operation and provides safety even with less experienced employees.
Where the Strain Sensor is Used
- Milling and turning centers: Mounted directly in the spindle head or on the corresponding cross members, the sensor detects stresses before structural parts deform.
- Grinding machines: It registers atypical stress curves during high material removal or worn tools.
- Transfer lines: Thanks to its fast response, it also protects during frequent tool changes or part shifts.
- Loading devices and gantries: The sensor detects load peaks in gripper arms or guides directly as they occur.
- Robots and special machines: It measures the load at critical points and transmits the data for intelligent process monitoring.

With Montronix to a Ready-to-Use Strain Sensor
We support you from selection to commissioning. Our team checks your machine, advises on placement and application, and delivers a pre-assembled sensor system on request. We also offer test installations for real conditions in your production. In combination with evaluation units such as IBU Plus or Spectra ONE, we integrate the sensor into existing systems.
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Would you like to measure stresses directly and protect your machines? Then test the StrainLink250-DA in use. Our team supports you with selection, installation, and operation. On request, we can also provide the sensor as a rental device directly in your machine.
Send request nowFAQ: Frequently Asked Questions about the Strain Sensor
What does the strain sensor actually measure?
The sensor measures the smallest changes in length directly on the surface of machine parts. It detects when the material stretches or compresses due to load. These changes are directly related to stresses that occur during operation. This gives you precise information about the mechanical stress on your machine.
For which machines is the sensor suitable?
You can use the StrainLink250-DA in CNC machines, robots, transfer lines, or special systems. It works wherever components are deformed by loads and this load is relevant for process reliability. The sensor also provides reliable data in grinding machines, loading gantries, or presses. The application is not limited to one machine type.
Can I retrofit the sensor to old machines?
Yes, the sensor is particularly suitable for retrofitting existing systems. It works independently of the machine control and does not require adaptation to the PLC or CNC. You simply mount it on the structure and connect it to an existing or new evaluation unit. This allows you to quickly equip older machines with condition monitoring.
How does commissioning work?
After mechanical fastening and electrical connection, the evaluation system immediately detects the signals. A short manual calibration on site is necessary. You can immediately record measurement data and set threshold values. The system is fully available in a short time.
What problems can the sensor prevent?
The sensor detects stresses that indicate distortion or impending tool breakage. This allows you to react in time before components fail or tools are damaged. The sensor also provides early warning in the event of impending collisions or atypical loads. This protects your machine from unplanned downtime and costly repairs.
What is the typical application?
With slow movements, errors usually only become apparent when it is already too late, as there is rarely a bang as with collisions due to fast movements. Thus, a typical application is protection against collision during finishing processes in the machine tool. Here, only low feeds are usually used; in the event of an error, the tool or spindle presses against the resistance with low acceleration – but even the smallest movement is detected by the strain sensor and immediately sends the signal to the machine control for emergency stop. But another type of monitoring is also performed with strain sensors: grippers of, for example, robots or loading gantries. If the workpiece is gripped at an angle or not gripped at all, the strain generated in the gripper does not match the desired strain that should occur at that time, so the machine control immediately receives the corresponding signal and can stop the gripping process.