The Temperature Measurement and Calibrationapparatus fits on a desk or bench top. It includes eight different temperaturemeasurement devices and shows their characteristics and how to calibrate themagainst a standard. The built-in precision reference sensor works as anaccurate temperature reference. A display shows the temperature from thereference sensor and the local (barometric) pressure from the built-in pressuresensor. The display also calculates the local boiling point of water based onthe barometric pressure. Studentsadd crushed ice (not supplied) to the insulated icebox and clean water to thefully guarded water heater tank. A carefully rated immersion heater in the tankheats the water steadily up to boiling, giving time to take accurate results.The water heater tank includes a water level float switch and a safetytemperature cut-out switch to turn off the heater in case of low water level.The water heater tank has a drain tap for connection to a suitable container orlocal water drain. This helps students to change the heated water safely andquickly, reducing experiment time. As an extra reference, a liquid crystaltemperature indicator strip on the front of the heater tank shows itstemperature during experiments. To the right of the temperature indicatorstrip, a window allows students to test the thermal infrared thermometer on amatt black or brushed steel surface of the heater tank. This shows limitationsof infrared measurements caused by surfaces of different emissivity.