Clamp-On & Non-Invasive RTD Sensors — No Process Penetration Required
Clamp-on and non-invasive RTD sensors for retrofit pipe, vessel, and line temperature measurement.
Product Overview
Clamp-On & Non-Invasive RTD Sensors — No Process Penetration Required
Clamp-on and non-invasive RTD sensors for retrofit pipe, vessel, and line temperature measurement.
Clamp-On RTD Contact Style
Clamp-on RTDs provide external pipe or vessel temperature measurement where the process cannot be opened or a retrofit sensor is preferred.
Surface-Contact Clamp Style
Use this clamp-on format when pipe or vessel temperature must be measured externally without opening the process.
Clamp-On RTD Configurations
Adjustable Pipe Clamp RTD
A spring-loaded Pt100 element mounted in a stainless steel pipe-clamp body that adjusts to fit pipe OD from 1/2" to 4" NPS. The spring mechanism maintains consistent contact force between the sensing element and the pipe surface across the full temperature range, compensating for thermal expansion. No pipe insulation removal required for standard installation.
Band-Strap Clamp RTD
A flat Pt100 sensing element bonded to a thermal coupling pad, held against the pipe surface by a stainless steel banding strap. Fits any pipe OD with no adjustment required — the strap wraps and locks. Low profile; compatible with pipe insulation over the top. The lowest-cost non-invasive solution for permanent monitoring installations.
Under-Insulation Clamp RTD (UIR)
Designed for permanent installation under pipe insulation, the UIR version uses a low-profile stainless housing and MI-insulated lead cable rated for the high ambient temperature environment under lagging. The Pt100 element is encapsulated in thermally conductive compound within the clamp body to maximise thermal contact with the pipe. Widely used for heat tracing monitoring and steam jacketed piping.
* Surface measurement accuracy depends on pipe insulation, flow conditions, and ambient temperature. Not a substitute for immersion measurement where accuracy is critical.
Accuracy Limitation of Surface Measurement
Clamp-on sensors measure pipe outer-surface temperature, not process fluid temperature. In well-insulated, fully-developed turbulent flow, the surface temperature closely tracks the fluid temperature. In low-flow, stratified-flow, or poorly-insulated conditions, a surface measurement may be 5–20°C cooler than the process fluid. For accuracy-critical measurements, use an immersion sensor. For leak detection, heat-trace monitoring, flow confirmation, and safety backup measurements, clamp-on RTDs provide a practical and cost-effective solution.
When to Use Clamp-On RTD
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