which sensor is suitable for temperature measurement?

Question

instrumentation

Answer 1

The answer is really determined by the temperature range to be measured and the desired accuracy. For general work the Pt-100 (platinum resistance sensor) is suitable up to 250C and down to -40. There are special thermistors that will go lower.

For higher end work, thermocouples are better. A type J goes up past 500C and a type K will go past 1000C.

If the temperatures you wish to measure get hotter, there are infra-red sensors that provide non-contact temperature measurement that go up to 1500C.

For higher ranges than that, the optical pyrometer is your best bet.

If the measurement doesn't need to be tied into a computer, a thermometer has the advantage of simplicity and easy of use.

Answer 2

Temperature measurement using modern scientific thermometers and temperature scales goes back at least as far as the early 18th century, when Gabriel Fahrenheit adapted a thermometer (switching to mercury) and a scale both developed by Ole Christensen Røemer. Fahrenheit's scale is still in use, alongside the Celsius scale and the Kelvin scale.

Many methods have been developed for measuring temperature. Most of these rely on measuring some physical property of a working material that varies with temperature.

One of the most common devices for measuring temperature is the glass thermometer. This consists of a glass tube filled with mercury or some other liquid, which acts as the working fluid. Temperature increases cause the fluid to expand, so the temperature can be determined by measuring the volume of the fluid. Such thermometers are usually calibrated, so that one can read the temperature, simply by observing the level of the fluid in the thermometer.
Another type of thermometer that is not really used much in practice, but is important from a theoretical standpoint is the gas thermometer.

Other important devices for measuring temperature include:

Thermocouples
Thermistors
Resistance Temperature Detector (RTD)
Pyrometers
Langmuir probes (for electron temperature of a plasma)
Other thermometers
One must be careful when measuring temperature to ensure that the measuring instrument (thermometer, thermocouple, etc) is really the same temperature as the material that is being measured. Under some conditions heat from the measuring instrument can cause a temperature gradient, so the measured temperature is different from the actual temperature of the system. In such a case the measured temperature will vary not only with the temperature of the system, but also with the heat transfer properties of the system. An extreme case of this effect gives rise to the wind chill factor, where the weather feels colder under windy conditions than calm conditions even though the temperature is the same. What is happening is that the wind increases the rate of heat transfer from the body, resulting in a larger reduction in body temperature for the same ambient temperature.

Answer 3

A Craftsman 1000 deg. F infrared thermometer. Can be used for Electrical troubleshooting, HVAC, automotive, plant maintenance and food service. Allows one to measure high temperatures by pointing and shooting.

Answer 4

Density is the degree of a few thing consistent with some thing. In math communicate, we could write rho = A/B; the place rho is a density variable, A is a few thing which would be greater or much less dense (compacted), and B is the some thing into which A is compacted. occasion: A = kind of school scholars and B = one telephone sales area. hence the pupil density in that telephone sales area is rho = A/B = N/a million; the place N is the kind of scholars and the a million is the single telephone sales area. occasion: A = mass of a bowling ball and B = quantity (4/3 pi r^3) of that ball. hence the mass density of that ball is rho = A/B = m/(4/3 pi r^3); the place m is mass and r = radius of the ball. There are all kinds of density: flux density, molar density, atmospheric density, weight density, inhabitants density, and on and on. yet all of them have one factor in straight forward, they are the degree of a few thing compacted into some thing (a quantity, an area, a field, etc.).

Answer 5

If the chemical composition of the tested material is known ie; gold, carbon; iron; then a pyrometer is the most accurate for temperatutres >400 deg C.

Answer 6

A thermometer?

Answer 7

lisic (lysic)
laser is better and speedy and correct.