ST350 Strain Transducer
Overview
The ST350 Strain Transducer has been designed to quickly and accurately measure strain on a variety of structures in harsh field environments. This 350Ω full Wheatstone bridge strain transducer is very accurate, rugged, and waterproof. Providing roughly 3.5 times the output of a typical foil strain gage, these reusable sensors are ideal for measuring live-load strain on structures and can be installed within minutes in all weather conditions.
FEATURES:
- Cost-effective
- Installs in 5 minutes or less
- Reusable, lasts for >10 years
- Waterproof to 20ft (6 m)
- Industrial cable, custom lengths
- Standard millivolt output
- N.I.S.T traceable calibration
APPLICATIONS:
- Steel
- Pre-stress/post-tension concrete
- Reinforced concrete
- Timber
- Fiber Reinforced Polymer (FRP)
- Live-Load testing & monitoring
- Laboratory testing
- Fatigue monitoring
- Tension rod forces
Steel
Concrete
DIMENSIONS:
SPECIFICATIONS
| MODEL | ST350 |
| CIRCUIT | Full Wheatstone bridge with 4 active 350Ω strain gages |
| EXCITATION VOLTAGE | +1.0 to +10.0 Vdc |
| OUTPUT | mV level, ratiometric to Excitation Voltage |
| STRAIN RANGE | ±4,000 µε (Calibrated to ±2,000 µε) |
| TYPICAL SENSITIVITY | ~500 με/mVout/Vin |
| ACCURACY1 | < ±1% |
| EFFECTIVE GAGE LENGTH | 3.0 in (76.2 mm) [Gage Extensions available for R/C structures] |
| HOUSING | Machined 6061 Aluminum Alloy |
| CORROSION PROTECTION | Hard Anodized Clear (MIL-A-8625 Type III) |
| WEATHER PROTECTION | Designed to exceed IP67 Optional 100 ft (30 m), waterproofing available |
| TEMPERATURE RATING2 | -58° to +176 °F (-50° to +80 °C) |
1 Accuracy defined at the calibrated ±2,000 µε range.
2 Temperature limit based on instrumentation cable operating temperatures, call BDI for wide temperature range cable options.
Repair & Recalibration Services: BDI offers repair and recalibration services for all BDI Strain Transducers using our NIST-traceable Automated Strain Transducer Calibration System (ASTCS) that insures high-quality strain measurements.
Options & Accessories
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Intelliducer Connector: Required for use with STS Intelliducer Nodes, cable is connected and potted for a weatherproof seal. |
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Integrated Thermistor: Temperature range of -55 °C to +220 °C, ±0.5 °C accuracy. |
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Reusable Mounting Tabs: ¼-20 or M6, zinc plated steel mounting tab. |
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Tab Jig: Machined aluminum jig for safely attaching mounting tabs to the strain transducer. Includes either 7/16″ or M10 end wrench. |
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Gage Extension: Machined aluminum 24 in (610 mm) gage length extension with 3.0 in (76 mm) increments |
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Extension Jig: Aluminum mounting jig for safely attaching gage extensions |
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Installation Jigs: Welding or concrete drilling jigs |
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Protective Covers: Insulated aluminum protective covers. |