Charcoal is produced by heating wood with minimal oxygen to remove water. Traditional method involved stacking wood in conical piles with air openings. Professional charcoal burners lived in isolated huts to manage the process. Modern retorting technology yields higher efficiency than traditional kilning
Salt is primarily sodium chloride (NaCl) and essential for human health. Salt crystals are translucent, cubic in shape and white in appearance. Salt dissolves in water at 359 grams per liter
Switch connects or disconnects electrical circuit paths. Contacts touch when closed, separate when open. Can be manually operated or function as sensing elements
Coke is a grey, hard coal-based fuel with high carbon content. Produced by heating coal or petroleum without air in airless kilns. Bituminous coal must meet specific criteria for coking. Coking process typically occurs at 1,000-1,100°C
Pt100 sensor provides precise temperature monitoring with ±0.5°C accuracy. Resistance of sensor increases linearly with temperature. Available in screw-in and surface sensor versions. Length adjustable from 95mm to 400mm
Diamond is the hardest natural mineral, rated 10 on Mohs scale. First used as talisman by prehistoric humans, highly valued in ancient civilizations. Alexander the Great brought diamonds from India to Europe in 327 BC. Cullinan Diamond, weighing 3,106 carats, discovered in 1905