Does thermal surveillance work in complete darkness?
Yes. Thermal cameras form images from infrared radiation and do not require visible-light illumination, although range and image detail still depend on the sensor, lens, atmosphere, and target contrast.
How is a lens selected for perimeter monitoring?
Lens selection starts with target size, required detection or identification range, horizontal field of view, installation height, and the sensor format and pixel pitch of the thermal module.
Can thermal and visible cameras be combined?
Yes. A dual-sensor system can use thermal imaging for detection and a visible camera for scene detail or operator verification, with mechanical and software alignment designed around the application.