Feature

Size matters for safe thermal inspection

For hazardous applications such as establishing the health of electrical components at a substation, the ability to measure temperature accurately over a distance is critical. Achieving this depends on several factors and two of the most important are the resolution of the detector and the chosen camera lens.

02/09/2019 14:22:41

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You can compare resolution to human eyesight. If you have 20/20 vision, you can define the smallest letters at the greatest distance and that’s the equivalent
using an infrared camera with a high-resolution detector. A low-resolution detector is the same as a person whose sight is low on the visual acuity scale. The vision
is improved by glasses and in the case of the IR camera by adding a magnifying glass to optically reduce its distance from the target.

This enables
the camera to take an accurate temperature measurement by allowing it to get more detector pixels on the target, giving more detail in the thermal image. And it’s
important to note, digital zoom doesn’t improve accuracy, so higher resolution or also narrow field of view is key here.

Read the full article in the September issue of DPA.

Written By Sophia Bell

Sophia Bell is the Group Editor of DPA, Connectivity, and PBSI. She joined the team in 2020 as Assistant Editor after achieving a First-Class Honours BA in English Literature and Film Studies from the University of East Anglia. In her current role, she leads the editorial strategy, driving digital growth and ensuring each title continues to deliver trusted, relevant insight for engineering and manufacturing professionals.