PTR India Technical Blog

Calibration, Metrology & Quality Insights

In-depth technical articles on instrumentation, measurement uncertainty, NABL/ISO 17025, and laboratory best practices — written by practitioners.

Search: "RTD" · 2 articles
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Self-Heating Effect in RTD: Meaning, Cause, Formula and Practical Importance
Self-Heating Effect in RTD: Meaning, Cause, Formula and Practical Importance

Self-heating in an RTD occurs when the measuring current generates heat inside the sensing element, causing the RTD to indicate a slightly higher temperature than the actual medium. This article explains the cause, formula, example calculation, influencing factors, importance in calibration, and practical ways to reduce RTD self-heating error.

Shakti Sindhu
08 Jun 2026
RTD Working Principle: How Resistance Temperature Detectors Measure Temperature
RTD Working Principle: How Resistance Temperature Detectors Measure Temperature

An RTD, or Resistance Temperature Detector, measures temperature by sensing how the electrical resistance of a metal changes with temperature. This article explains the RTD working principle in simple terms, including PT100, PT1000, wiring methods, advantages, limitations, applications, and calibration importance.

Shakti Sindhu
30 May 2026