Temperature and pressure sensors are the backbone of data collection, but their “accuracy” fades silently over time. Without a strict calibration cycle, you might trust a sensor that’s off by 2°C or 5psi—ruining weeks of tests. Here’s how to manage cycles like a pro.

Calibration frequency guidelines:

· High-use sensors (daily testing): Every 3 months.

· Moderate use (weekly): Every 6 months.

· Low use (monthly or less): Annually.

· Extreme environment exposure (e.g., >300°C, corrosive fluids): After each use, plus routine cycles.

How to track cycles:

· Use a spreadsheet or dedicated software (e.g., Calibration Control) to log:

· Last calibration date and results.

· Next due date (set reminders 2 weeks early).

· Sensor ID, type, and application (e.g., “K-type thermocouple, engine tests”).

· For large fleets, color-code tags: Green = valid, yellow = due soon, red = expired.

Calibration methods for common sensors:

· Thermocouples: Use a dry-block calibrator (e.g., Fluke 9170) to test at 0°C (ice bath), 100°C, and your typical test temp (e.g., 200°C).

· Pressure transducers: Compare to a deadweight tester or certified reference gauge at 0%, 50%, and 100% of their range.

When to retire a sensor:
If calibration shows drift >50% of its rated accuracy (e.g., a ±1°C sensor now drifts ±0.6°C), replace it. Repairing rarely fixes long-term drift.

Need help building a calibration schedule? Share your sensor count and usage, and we’ll draft a cycle plan.