Accurate temperature measurement is crucial across all industries, but over time, RTD sensors can experience drift, leading to unreliable and inaccurate readings. Let’s dive into what causes RTD drift and how to effectively mitigate it.

[00:20] RTD drift refers to the gradual change in an RTD sensor's electrical resistance, which results in skewed temperature data. This drift can be categorized into two main types:

Permanent Drift [00:35]: A long-term shift in the sensor’s resistance, often caused by sensor degradation, aging, or physical damage. This results in a permanent error that requires professional recalibration or a full sensor replacement.

Temporary Drift [00:45]: This occurs due to external factors like extreme temperature fluctuations, electromagnetic interference (EMI), or mechanical stress. This type of drift is often reversible once the sensor returns to a stable environment.

[01:03] What causes these inaccuracies?
Aging: Over time, platinum elements naturally degrade, contributing to permanent drift.
Temperature Extremes: Exposure to temperatures outside the design range can damage the PT100/PT1000 element.
Vibration & Mechanical Stress: Physical stress can lead to temporary fluctuations and unstable readings.
Contamination: Dirt, moisture, or chemicals on the sensor can change resistance levels, leading to temporary drift.

[01:33] To minimize drift and ensure process efficiency, follow these best practices:
Regular Calibration: Periodically test sensors against traceable standards to correct for drift.
Stable Environment: Maintain a controlled environment to avoid unnecessary thermal shocks.
Proper Installation: Ensure sensors are securely mounted to avoid vibration-induced stress.
Routine Maintenance: Inspect for signs of wear or contamination to prevent permanent sensor failure.

[02:17] Understanding both permanent and temporary drift helps you maintain optimal sensor performance. Tempotech Controls provides expert in-house and on-site calibration services to keep your systems accurate.

[02:27] Contact our sales team today for more information or visit www.tempotechcontrols.com.