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Selecting
an RTD
Thermocouple vs. RTD
In general, either
sensor will work adequately for most applications. However, you should
choose a sensor type with characteristics best suited for your application.
This will result in a sensor that performs best where you need it
most. Use the following chart to determine which sensor has the features
that are most important to the temperature measurement you wish to
make.
Choosing a temperature
sensor can often be very straightforward, sometimes tricky, but always
worth doing well. That's because these sensors, especially in science
and engineering uses, can spell the difference between repeatable
results and nonsense numbers. The name of the game in measurement
is to measure with an amount of inaccuracy or uncertainty that is
acceptable. So, the first thing you need to know is how well you need
to know the value of the temperature numbers you expect to get. A
simple series of questions, when answered, will usually get you started.
1. What is the desired temperature range, the tolerable limit to the
error in measurement and the conditions under which the measurement
is to be performed?
2. Is it possible to touch the object and if so would the sensor or
the temperature of the object be likely to be seriously affected by
the contact?
If the answer is yes, then a non-contact temperature sensor is needed.
If no, then the answer probably lies with one of the other sensor
types.
3.If a contact sensor appears satisfactory, then questions revolve
more around temperature measuring range, satisfying the conditions
of use and meeting the acceptable error allowance.
Notice that this needs some more input. It'll come in time.
If you've got sensors you would like to have listed or linked, a good
application story, a new sensor, a training course, calibration service,
know of an Internet- accessible data base or other input you believe
valuable, send an email. If it meets some simple norms of good taste
and utility, it will be added to the site for the benefit of others.
Email to: pyromat@satyam.net.in
Thanks for visiting and come back now and again to see how we've grown.
Disclaimer
The biases and any errors that exist here are company's alone based
on our experience, education, their unfilled voids and imperfections.
Please be aware that this is only one sources of information. It is
not advice, especially not definitive advice. You alone take on any
responsibility and consequences that may result from your actions
or choices made after visiting here. Grow and be responsible for your
own education and choices. This site must be and cannot be anything
more than a way station in your search for useful knowledge.
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