This spoon measures the level of salinity of your food (liquid, sauce).Great tool if you have high blood pressure.Heat-resistant temperature: 140 to 176 degrees (°F)A salinity range: 0.6-1.2% (for exclusive use of the hot)An indication method: More than three phases type, three points of indication /0.6-0.8%, 0.9-1.1%, 1.2 and up