Thermometers

Thermometers

  Thermometers uses thermodynamic properties of materials to measure temperatures as mentioned in previous posts. Different types of thermometers has different purposes to measure temp at different situations, such as measuring extremely hot substance or rapidly varying temperature. For Several important properties of thermometers might be;

• Accuracy
• Sensitivity
• range of temperature
• time it takes to give you reading
• How much those thermometer absorbs heat

  For some applications, measuring temperature of small body (such as little amount of liquid) might not be accurate if we don't use thermometers that doesn't need to touch the body(such as laser thermometer gun). When we use thermometers that needs to touch the body (liquid-in-glass thermometers for example), thermometers might end up absorbing some heat from body, thus changing temperature of the body that drops accuracy.  

  Some thermometers uses varying resistor called 'thermistor'(which I'll talk about it later in depth  with other electrical sensors) that gives resistance depending temperature, allowing thermometers to give readings to temperature. This allows thermistor thermometers to give readings for rapidly varying temperature, or small substance if thermistor uses suitable semiconducting materials. Creating small logic circuit allows to create system that can process things due to temperature. One of common use of this thermometer might be system in the computers/laptops that shutdowns computer if they gets too hot that can damage the circuit.