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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...
Resistance Temperature Sensors That Handle Harsh Conditions
resistance temperature sensor
When you’re monitoring temperature in a dam or a deep excavation, the sensor needs to survive more than just temperature swings. Water, soil pressure, and long cable runs can throw off readings if the sensor isn’t designed for the job. That’s where resistance temperature sensors come in, and not all are equal. Kingmach builds these sensors for the rough and dirty reality of field instrumentation—drawing on decades of geotechnical experience. Whether you’re tracking concrete curing, permafrost, or groundwater temperature, the right resistance element and housing make the difference between dependable data and constant maintenance calls. Our sensors, centered on platinum RTDs like the Pt100, are put together with and for engineers who need readings they can trust, with the flexibility to adapt probe dimensions and wiring to match your logger and site layout. No generic catalog numbers here—just sensor configurations that fit the measurement task at hand.
Technical Detail
Configured around process stability, mold life, and long-term uptime.
Platinum resistance temperature sensors like the Pt100 work on a simple principle: the element’s resistance changes predictably with temperature, giving you an accurate, repeatable signal. In geotechnical and industrial settings, the trick is protecting that element. Kingmach uses stainless steel sheaths and field-ready cable assemblies to keep moisture and mechanical stress from compromising the probe. Standard accuracy classes (A, B, or better) are available, and the choice between 2-, 3-, or 4-wire connections lets you balance cost against lead resistance errors. Customization sits at the core of what we do. You get to specify probe diameter, length, mounting threads, and cable jacket—PVC, silicone, or armored—so the sensor drops right into your borehole, embedment gauge, or surface mount fixture without a fight. Because we manufacture in-house for a global distribution network, we can also support you with wiring diagrams, calibration advice, and after-sales help when things need to move quickly on site. This hands-on approach, paired with a wide range of companion geotechnical instruments, means you’re not just buying a sensor; you’re getting a measurement solution that’s been thought through for your project.
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FAQ
Common technical questions
What’s the difference between a Pt100 and a thermocouple for geotechnical use?
Pt100 resistance sensors offer better accuracy and stability at moderate temperatures, while thermocouples handle higher ranges. For dam or soil monitoring, Pt100s are often preferred because their output is more linear and less affected by long cable runs when using 3- or 4-wire setups.
Can you customize the probe length and cable type?
Yes. We routinely build sensors with probe lengths from 50mm to over 500mm, and cables can be specified with PVC, silicone, or armored jackets depending on installation conditions.
How do I connect a resistance temperature sensor to my data logger?
Most loggers accept 2-, 3-, or 4-wire inputs. We recommend 3-wire for balanced cost and accuracy; 4-wire eliminates lead resistance entirely for high-precision needs. Our sensors come with clear wiring diagrams.
What is the typical response time?
Response time depends on the probe mass and sheath material. A standard stainless steel probe in moving water might respond within seconds, while a sensor in still air will be slower. We can advise on the best probe design for your application.
Do you supply sensors for long-term embedding in concrete?
Absolutely. Many of our sensors are installed in dams, bridges, and foundations. We use robust housings and moisture-proof connections to ensure years of stable readings.
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.