temperature sensor network
temperature sensor network
(OP)
Hi: I am new to the forum, I am Alejandro from Argentina. I was asked to build a low cost temperature sensor network.
The network will have 10 sensors separated 10 meters each.
I would like to hear your opinion about the technology to use, I know that 4-20 mA sensors are suitable but very expensive, 1-wire sensors can be an option.
Do you know any other low cost solution?.
Thank you in advance,
alejandro
The network will have 10 sensors separated 10 meters each.
I would like to hear your opinion about the technology to use, I know that 4-20 mA sensors are suitable but very expensive, 1-wire sensors can be an option.
Do you know any other low cost solution?.
Thank you in advance,
alejandro





RE: temperature sensor network
One of the cheapest sensors you can use is a thermistor with a negative temperature constant (NTC). They are small, they are cheap (a dollar apiece - or less), and they are non-linear.
They can be linearized with a series/parallel resistor over a limited temperature range (say -20 to +30 degrees, or 0 to 50 degrees) if you need that. If you evaluate the temperature with a computer, you can linearize in the computer program and the temperature range can then be more than 100 degrees celsius.
Google "NTC thermistor" for tons of more information.
RE: temperature sensor network
I do understand that NTC can be a cheap solution.
I was wondering how can I reach a CPU (for instance, a PLC) with that information (the measured temperature). That is to say, how can I "send" that temperature to a PLC that is 10 meters away from the sensor.
That is why I was considering 4-20mA and Dallas' 1-wire as options.
Best Regards,
Alejandro
RE: temperature sensor network
RE: temperature sensor network
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