In Indiana, addictions counselors may be licensed at the bachelor's or master's level.
â¢ If using hot water to sanitize, use a calibrated thermometer to measure the water temperature. Refer to Using and Calibrating Thermometers SOPs. HACCP-Based SOPs 3 Cleaning and Sanitizing Food Contact Surfaces, continued (Sample SOP) MONITORING, continued: 3. Ensure that food contact surfaces reach a surface temperature of 160 o F or above if using hot water to sanitize. MONITORING: Foodservice employees will: 1. During all hours of operation, visually and physically inspect food contact surfaces of equipment and utensils to ensure that the surfaces are clean.
They include the thermal expansion of solids or liquids with temperature, and the change in pressure of a gas on heating or cooling. Radiation-type thermometers measure the infrared energy emitted by an object, allowing measurement of temperature without contact. Most metals are good conductors of heat and they are solids at room temperature. Mercury is the only one in liquid state at room temperature, and has high coefficient of expansion. Hence, the slightest change in temperature is notable when it's used in a thermometer. This is the reason behind mercury being used in thermometer. Some of the principles of the thermometer were known to Greek philosophers of two thousand years ago.