Multi-Point RTD Assemblies — Temperature Profiling with Pt100 Accuracy
Multi-point RTD assemblies for profiling, validation, and coordinated temperature mapping across multiple zones.
Product Overview
Multi-Point RTD Assemblies for Stable Temperature Mapping
Multi-point RTDs place several platinum sensing elements into one coordinated assembly for profiling, validation, and zone-to-zone comparison where stability and repeatability matter.
Multi-Point RTD Profile Design
These assemblies are specified around element count, element spacing, insertion depth, lead management, calibration points, and how the profile data will be used in the process or validation workflow.
Profile-Style Multi-Sensor Assembly
Use this bundled geometry when multiple RTD depths need coordinated profiling, validation mapping, or controlled measurement across several points.
RTD Profile Measurement Tradeoffs
RTD Multi-Point vs. TC Multi-Point
Accuracy at Depth
RTD: ±0.15°C
Thermocouple: ±1–2°C
Long-Term Stability
RTD drift is typically less than 0.1°C per year.
Cold-Junction Compensation
Not required for RTD assemblies.
Maximum Temperature
Thermocouples are generally preferred above 600°C.
Cost
RTD assemblies cost more, with the premium tied to higher accuracy and stability.
Cryogenic and Validation Build Notes
Cryogenic Multi-Point RTDs
For LNG tank stratification monitoring and cryogenic vessel temperature profiling, Thermometrics supplies multi-point RTD assemblies with individual Pt100 elements calibrated down to -200°C. NIST-traceable calibration at multiple cryogenic temperatures. 316SS sheath, PTFE-insulated leads rated for continuous cryogenic service.
Validation and Mapping Workflows
Multi-point RTDs are useful when the customer needs stable, repeatable temperature data across multiple depths or zones rather than a single measurement point.
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