Select giving reasons the most suitable choice of temperatur

Select, giving reasons, the most suitable choice of temperature sensor for use in the following scenarios: a) Measuring the temperature of a printed circuit board in a computer. b) Measuring the temperature in a glass melting furnace that operates at temperatures of up to 1600 degree C. c) Reliable measurement of the temperature in a pharmaceutical process over the range 0 to 300 degree C and within plusminus0.5 degree C. d) Measuring the water temperature in a dishwasher. e) Measuring the rate of change of temperature at a particular spot on the cylinder head on an internal combustion engine. f) Measuring temperature of the behavior of metals at very low temperatures (123 to 70 K) in a cryogenics laboratory.

Solution

There are many type of temperature sensors but based on their characteristics they are used in the required field.

The best temperature sensors are classified as follow for different temperatures

Thermocouple _ -100 to 500 deg cel

TMP 100 (or)LM75(or)SHT15 _ -55 to 125 deg cel

LM35DZ _ -40 to 123.8 deg cel

TPA81 _ 0 to 100 deg cel

DHT11 (or) _ 0 to 50 deg cel

for high temperature upto 1600 degree celsius we can use rosemount temperature sensor.

for metals we can use the sensors with RLD and thermister or radiation pyrometer