Taking a step back into time, the characteristics of human body infrared radiation were employed by the security industry and used as a base for the development of PIR (Passive Infrared Detector). Infrared waves radiate from the human body at 3~50μm, among them, 8~14μm occupies 46 percent, and the peak radiation is reflected around 9.5μm. At the same time, the body of the emission rate is as high as 0.95, much higher than the general environment object emissivity, It means that even if the humam and the environment temperature are exactly the same, also can easily distinguish the human body.

The infrared detector output of visual processing image is called " infrared thermal imaging ".The visualized processed image emitted by an infrared detector is referred to as thermography. Radiating capacity of different objects, even different parts from the same object is diverse, as well as their reflection to radiation. Utilizing radiation differentiates objects from their environment, and also differentiates from each part of a scene. Thermography can present each scene as part of radiating fluctuation to display the thermal energy distribution of the scenario. It is like a third human eye being able to visualize the imperceptible world beyond human recognition.

Sunell has announced its latest thermal bullet network Camera, SN-TPC4200K, recently.  The SN-TPC4200K has features of non-refrigeration IRFRA sensor, infrared long-wave 8～14um, 420×315 pixels; high thermal sensitivity up to 50mK; 8 / 15 / 25 / 35 / 50 mm parfocal prime lens (optional); pseudo color mode shift: black hot/white heat/iron red; DVE image enhancement.

As one of the mainstream CCTV provider in China,Sunell present is able to provide the professional and complete solutions to large project applications and fields, which include forest fire prevention, security monitoring and control for airport, breeding industry monitoring, important cultural relic monitoring, red tide monitoring, borderline monitoring, coast defense monitoring, individual combat system of public security and armed police, flood control monitoring of nuclear power plant, transformer substation, hydropower station, reservoir dam and lake, maritime port and pier, marine environmental protection, maritime petroleum detection, overhead lookout in city, night viewing in oil field, night viewing in large factory and monitoring of petroleum transport pipeline, natural gas pipeline, ship dispatch system, uninhabited island and ancient tomb etc.

With the latest and advanced technology to features, the Sunell thermal network camera may take one of the leading positions among others in the global market.