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Vibrating Wire Strain Gauges for Bridge, Tunnel & Dam Monitoring: Complete Selection Guide
The global construction industry is experiencing a massive surge in large-scale infrastr...
Geotechnical Temperature Sensors for Field Monitoring
Temperature Sensor
A concrete dam warming up faster than expected can signal trouble long before cracks appear. That’s where temperature sensors come in. Kingmach supplies sensors built for the long installations common in geotechnical work: vibrating wire types for remote reading, thermistor strings for profiling, and thermocouples for high-temperature spots. The standard calibration process follows ASTM guidelines, and each sensor leaves the factory with a traceable calibration sheet. Custom lengths, connector types, and even embedded data loggers are available for projects that need them. Installation teams appreciate the range of accessories like grouting fittings and terminal boxes, which speeds up field work. Rather than offering off-the-shelf kit, Kingmach works with you to match the sensor to your logger system.
Technical Detail
Configured around process stability, mold life, and long-term uptime.
Temperature monitoring in geotechnical engineering is not about precision labs; it’s about sensors that stay stable in freezing permafrost or inside curing concrete at 60°C. Kingmach stocks several sensor types to cover these extremes. Vibrating wire temperature sensors pair with standard readouts and offer long-term zero drift, making them a first choice for dam galleries and tunnel linings. Thermistor strings—available with up to 16 points per cable—are popular for profiling in boreholes and water wells. For higher temperatures, mineral-insulated thermocouples hold up past 400°C, useful in geothermal wells or fire test setups. All sensors are built in-house, which means custom cable lengths, connector types, and even sensor housings are standard, not a special order. The 4–20 mA output option integrates directly with most industrial PLCs, cutting out signal conditioners. Projects in remote areas benefit from the low power draw of vibrating wire sensors, which can run on solar-powered loggers for months. Installation support includes advice on grout selection for embedding in concrete and cable routing for near-surface monitoring. Technical specs, calibration reports, and wiring diagrams are provided upfront, so field crews aren’t left guessing.
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Common technical questions
What type of temperature sensor works best for monitoring concrete curing?
Thermistor strings are commonly used because they can provide multiple measurement points along a single cable, giving a temperature profile through the pour. For single-point measurements, vibrating wire sensors are also suitable, especially if you need to read them with a portable indicator during early age.
Can I get sensors with cables longer than the standard 30 meters?
Yes, custom cable lengths are available. We regularly supply sensors with cables up to 200 meters and can go longer on request. Just specify the length in your inquiry, and we’ll confirm the feasibility based on sensor type and signal integrity.
How often should I recalibrate a vibrating wire temperature sensor?
A fresh calibration is advisable before each major project phase—typically annually for long-term monitoring. If the sensor is permanently embedded, recalibration is not possible, but the design ensures negligible drift. Portable sensors can be returned for recalibration.
Do these sensors work with data loggers from other brands?
Yes, they output standard signals—frequency for vibrating wire, resistance for thermistors, voltage or 4–20 mA. Most commercial geotechnical loggers can read them directly. If you need help with wiring or configuration, our technical team can provide guidance.
What’s the typical lead time for a custom thermistor string with 10 points?
It usually takes 2 to 3 weeks from order confirmation.
Need a solution for your project?
Share your product type, target capacity, and application requirements. Our team can review the details and recommend a practical next step.
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