Best thermal cameras 2025

A thermal camera (also known as an infrared or thermographic camera) detects heat instead of visible light, allowing you to see temperature differences, locate heat leaks, spot electrical faults, observe wildlife at night, or inspect buildings and machinery. Thermal imaging also works in complete darkness and reveals details invisible to the human eye.

Types of Thermal Imaging Devices

• Thermal camera phones – Smartphones with a built-in thermal imaging sensor. Leading technologies come from FLIR and InfiRay .
  
• Thermal camera dongles – Compact USB-C or Lightning attachments that turn an Android or iPhone into a thermal imaging device.
  
• Standalone thermal cameras – Dedicated handheld units used by electricians, HVAC technicians, builders, engineers, and outdoor enthusiasts. They often provide the highest image quality.

How Good Is the Image Quality?

Thermal sensors typically deliver lower resolutions than standard cameras — usually 80×60 px to 256×192 px, with some advanced professional models going higher.