Thermal Overlay simply makes sense.

A recent Lextar project has reinforced our belief that Thermal Overlay simply makes sense. Thermal Overlay Mode offers a unique level of detail allowing equipment operators or security officers to make faster and more informed decisions.

Thermal overlay uses dual wavelength cameras. Therefore, two cameras are used, a high-resolution daylight camera mounted alongside a thermal camera. These cameras see two different wavelengths within the light spectrum. Consequently, daylight or visible cameras see that of a human eye, wavelengths between 390nm to 770 nm. While thermal cameras see non-visible light in the 7.5um to 13.4um range. This non-visible light radiates off surfaces based on the specific temperature of that surface.

There are two basic categories of thermal cameras. Those cameras with Thermometric capability (sometimes referred to as radiometric) and those without. Both thermal camera categories are compatible with thermal overlay mode.

Thermometric Cameras

Thermometric Cameras allows any pixel within the image to accurately measure temperature. In conclusion, if temperature measurement is important? Thermometric is a simple choice.

Within these two basic thermal camera categories (mentioned above) performance specifications such as resolution and sensitivity are also key considerations when selecting a product.

Onboard analytics using functions such as pre-set thermal zones, thermal thresholds, motion detection, alarms and automated responses enables a high level of functionality. This offers many advantages in fit to purpose applications within many industries including automation, preventative maintenance, safety and security

The system can also deliver hierarchical responses as the priority rises the action is elevated whether it be on on-screen indications, I/O interfaces or emailed alerts.

Thermal overlay is now certainly a cost-effective solution for mainstream applications. If you are considering a thermal camera application and looking for product or advice we are willing to share our experience. Contact us at or via Contact Us.

Thermal Overlay
Thermal Overlay monitoring conveyor drive system and fire risk.