THE MEASUREMENT OF TEMPERATURE

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THE MEASUREMENT OF TEMPERATURE by Mind Map: THE MEASUREMENT OF TEMPERATURE

1. MEASURING TEMPERATURE

1.1. NON-ELECTRICAL

1.1.1. Bi-metallic Thermometer

1.1.1.1. Dial Thermometer Control Devices

1.1.1.2. Low Cost Negligible Maintenance Expense Stable Operation

1.1.1.3. Range of -30 to 550°C Accuracy of ±0.5 to ±1.0%

1.1.2. Liquid in Glass Thermometer

1.1.2.1. Mercury Alcohol

1.1.2.2. Accuracy of 0.05°C

1.1.2.3. Low Cost Simple Portable

1.1.2.4. Fragile Lack of Adaptability

1.1.3. Pressure Thermometer

1.1.3.1. Most Economical Versatile Widely Used

1.1.3.2. Low Cost No Maintenance Expenses Stable Accuracy Level is ±1°C

1.2. ELECTRICAL

1.2.1. Electrical-Resistance Thermometer

1.2.1.1. RTD

1.2.1.1.1. Formed From a Solid Metal Wire

1.2.1.1.2. Platinum

1.2.1.2. Thermistor

1.2.1.2.1. Ceramic-like Semiconductor Devices

1.2.1.2.2. Suitable Temperature Below About 300°C

1.2.1.2.3. Advantages

1.2.1.3. Thermocouple

1.2.1.3.1. Junctions

1.2.1.3.2. Phenomenons & EMF

1.2.2. Quartz-crystal Thermometer

1.2.3. Liquid-crystal Thermography

1.3. RADIATION

1.3.1. Measure the Temperature of a Body Through a Measurement of the Thermal Radiation Emitted by the Body

1.3.2. Wavelength -0.1 to 100µm

1.3.3. Types of thermometer

1.3.3.1. Total radiation pyrometer

1.3.3.2. Selective or partial radiation pyrometer

1.3.3.3. Infrared pyrometer

2. SCALES

2.1. CELCIUS

2.1.1. Freezing point at 0°C

2.1.2. Boiling point at 100°C

2.2. FAHRENHEIT

2.2.1. Freezing point at 32F

2.2.2. Body Temperature at 98F

2.3. KELVIN