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Wireless Strain Gauge SenSpot™ sensors offer a breakthrough technology for wireless strain measurement, enabling real-time and long-term monitoring of structural integrity. Stress and strain sensing are an integral part of most structural condition and strain monitoring system deployments used in bridges, buildings, and critical infrastructure.
SenSpot™ wireless strain gauge sensor uses Resensys’ proprietary sensing, scheduling, and ultra-low-power synchronization technology to deliver reliable, high-accuracy strain data over extended periods. Designed for both short-term assessments and permanent installations, SenSpot™ sensors provide consistent performance in demanding structural monitoring environments.
SenSpot™ strain gauge sensors are engineered to operate maintenance-free for up to a decade. After installation, these wireless strain gauge sensors do not need in-field calibration, battery replacement, or any other maintenance during their service life, making them ideal for long-term strain monitoring systems where access is limited and reliability is critical.
without battery replacement
1-µStrain resolution
self-adhesive(e.g. steel)/
flange-mount(e.g. concrete)
1 km free space
easy to reuse in other places
record unusual strain event
• Long battery lifetime (10 years, typical) • Wireless communication (IEEE 802.15).• Small size and light weight• High Accuracy: 1 microstrain typical resolution• High-rate data transmission triggered by sudden strain changes• Adjustable transmission interval• Easy mounting• High compatibility
• Long- term and continuous monitoring of strain (stress). • Detecting short-lived and transient high-strain events, e.g., caused by fast moving trucks on highway bridges or by turbulence on airframes. • Monitors and measures strain for highway bridges, airframes, pipelines, machinery, cranes, tunnels etc. • Conducts structural fatigue analysis, truck tests, and bridge load ratings. • Assess structural health in nuclear powerplants, wind turbines, and railway infrastructure. • Used in building monitoring systems, dam monitoring systems, and for monitoring retaining walls to accurately measure strain and ensure structural integrity.
Strain gauge sensors work on the principle of change in electrical resistance. When, a mechanical element subjects to a tension or a compression the electric resistance of the material changes. This is used to measure the force acted upon the element.
Strain gauges were created by utilizing the principle of strain. When a certain force is applied to a metal to make it expand or contract, the electrical resistance changes accordingly. The strain gauge measures the amount of strain by reading this electrical resistance and amplifying it to an electrical output.
Yes. SenSpot™ is highly compatible with third-party strain gauges with resistance values ranging from 120 ohms to 1000 ohms. It supports full-bridge, half-bridge, quarter-bridge, and rosette configurations, making it suitable for a wide range of structural monitoring applications.
No. SenSpot™ sensors are factory calibrated and do not require any in-field calibration after installation. This significantly reduces installation time and eliminates long-term maintenance requirements.
• Long lifetime: minimum expected life without battery replacement 10 years
• Lightweight： about 147 g (5.19 oz.)
• Wireless transmitter: 120 g (4.23 oz.)
• Cable (1ft): 10 g (0.35oz.)
• Strain sensing element: 17 g (0.6 oz.)
• Easy mounting:
○ Self-adhesive, no drilling is required (e.g. steel)
○ Flange-mount, drilling is required (e.g. concrete)
○ Quick installation, 1-2 minutes
• High accuracy: 1-µStrain resolution
• Wide working temperature: -40 to +65°C (-40 °F to +150°F)
• Long communication range: 1.0km free space
• Small size:
○ Wireless transmitter: 50mm (1.96”) x 50mm (1.96”) x 34mm (1.34”)
○ Strain Gauge sensor: 76.2mm (3”) x 33.4mm (1.30”) x 10mm (0.4”)
• Complementary data collected: temperature, battery voltage, etc.
• (Optional) High sampling rate; instant data transmission triggered by strain spikes:
○ A balance between power consumption and performance.
○ Perfect for detecting event and recording the waveform of a sudden strain change.
○ The triggering threshold is adjustable from 16µStrain to 512µStrain; the sampling rate can be changed from 10ms to 200ms.
Small wireless sensors that
make big differences
Address: 6517 Mid Cities Ave.
Beltsville MD 20705
USA
E-Mail: info@resensys.com
Phone: (301) 477 3075
