The SISGEO VK41 Spot Weldable Vibrating Wire Strain Gauge is designed for measuring strain on steel surfaces, beams, pipelines, and structural members in both civil and industrial engineering applications.
Thanks to its compact design and spot-welding capability, the VK41 is particularly suitable for use in confined spaces or in areas where traditional arc welding is not possible.
The VK41 series includes several models classified by installation type and application range, ensuring high flexibility to meet diverse project requirements.
🔹 Model 0VK4100VS00 – Spot Weldable Strain Gauge
This model can be spot welded or epoxy bonded directly onto steel surfaces, struts, tunnel linings, or pipelines.
Each gauge is pre-tensioned and calibrated before delivery to ensure optimal wire tension and precise measurement of minute surface strains.
Gauge length: 47.5 mm
Measuring range: 500 µε – 3500 µε
Accuracy: ±0.5% FSR
Waterproof rating: IP68
🔹 Model 0VK4100VSG0 – Strain Gauge Unit
This version includes only the vibrating wire sensing element, suitable for replacement, system integration, or use with custom mounting accessories.
Measuring principle: Vibrating Wire
Operating frequency: 1130 – 3000 Hz
Operating temperature: -20°C to +80°C
Stability: 0.1% FSR/year
🔹 Model 0VK4100VSP0 – Plucking Coil Unit
An independent plucking and readout coil module used in conjunction with the strain gauge to acquire strain data.
It includes a built-in NTC 3kΩ temperature sensor for automatic thermal compensation during measurements.
Signal cable: LSZH – flame retardant and heat resistant
Maximum cable length: 1000 m
Compatible with: SISGEO readout units and dataloggers
All models of the VK41 series are manufactured from high-grade stainless steel, IP68-rated, and designed to operate reliably in temperatures ranging from -20°C to +80°C.
The VK41 provides long-term durability, high precision, and excellent reliability, making it ideal for structural health monitoring in oil and gas facilities, bridges, dams, metro tunnels, and underground infrastructures.