THERMAL CAMERAS / INFRARED CAMERA / THERMOMETER
A thermographic camera (also called an infrared camera or thermal imaging camera or thermal imager) is a device that creates an image using infrared(IR) radiation, similar to a common camera that forms an image using visible light. Instead of the 400–700 nanometre (nm) range of the visible light camera, infrared cameras are sensitive to wavelengths from about 1,000 nm (1 micrometre or μm) to about 14,000 nm (14 μm). The practice of capturing and analyzing the data they provide is called thermography.
A temperature sensor is an electronic device that measures the temperature of its environment and converts the input data into electronic data to record, monitor, or signal temperature changes. There are many different types of temperature sensors.
BULD TEMPERATURE (DRY/WET)
Dry-bulb temperature (DBT) is the air temperature measured by an ordinary thermometer that is exposed to the environment and captures atmospheric temperature. To be able to measure DBT accurately, the thermometer should be exposed freely to the air and protected from various factors such as moisture and radiation.
The wet-bulb temperature (WBT) is the temperature read by a thermometer covered in water-soaked cloth (wet-bulb thermometer) over which air is passed.