• High humidity or fog can scatter IR radiation. While often minor for short industrial inspections, it becomes critical for long-range outdoor work.

3. Using On-Camera Measurement Tools

Your FLIR camera comes equipped with several standard tools to extract and analyze radiometric data directly in the field. We will focus on the primary tools:

3.1 Spot Meter (Point Measurement)

This is the most fundamental tool. It places a single crosshair on the screen, displaying the temperature reading for the pixel directly underneath it.

• Use Case: Checking the temperature of a single bearing, bolt, or component.
• Configuration: Ensure the spot meter is referencing the correct measurement mode (e.g., Max, Min, or Average, if applicable).

3.2 Area Box (Box Measurement)

This tool allows you to draw a rectangular box over a region of interest (ROI). The camera displays several statistics for all pixels within that box simultaneously:

• Max (Maximum): The single hottest temperature reading within the box.
• Min (Minimum): The single coldest temperature reading within the box.
• Average (Mean): The average temperature across all pixels in the box.

• Use Case: Assessing the overall temperature of a motor casing, insulation coverage, or identifying the hottest spot within a problematic area.

3.3 Line Measurement

Some advanced models allow drawing a straight line across the image. The camera then plots a temperature profile graph along that line.

• Use Case: Analyzing temperature gradients across a surface, such as checking for even heat distribution across a heating element or insulation failure profile.

4. Saving and Interpreting Radiometric Files

When you save an image on a radiometric camera, you are not just saving a JPEG. You are saving a file structure (often a JPEG overlaid with proprietary metadata or a dedicated radiometric format).

This metadata block contains all the settings you configured: Emissivity, Reflected Temperature, Distance, Date/Time, and the calibration curve used by the detector.

Why this matters: You can load this file later into FLIR's post-processing software (like FLIR Tools or ResearchIR) and change the emissivity or reflected temperature settings without losing the raw data, allowing you to recalculate accurate temperatures after leaving the site. This is the true power of radiometric thermal imaging.