High speed temperature logging

[ipc]

Looking for a low cost option to read temperature of a system at 10 or 20 ms sampling rate. I am looking for a 4 or 8 channel DAQ and high response thermocouples or RTDs that can measure temperature at a faster rate. If you know of such devices and also the high response thermocouple, let me know.

Thanks in advance.

[johnsold]

Almost any DAQ device can sample at 50 or 100 samples per second.

For thermocouples you will need an amplifer to boost the mV signals to a level compatible with the DAQ device.  For RTDs you need an excitation source so that you can measure the resistance.

The response rate is dependent on the physical characteristics of the object or material being measured and the size and configuration of the sensor.  Please tell us what you are measuring and the temperature ranges so that we can give tou more specific recommendations.

Lynn

[ipc]

Thanks Lynn for the reply.

I have several small (electro-mechanical) components in a closed system that generates heat in the ranges of room temperature to 100C. If I can use RTD with an external excitation voltage, can I use USB-6009 DAQ to meaure the analog voltages? If I use the thermocouples, does NI have any amplifier to amplify mV signals?

Thanks again.

[Norbert_B]

The problem on temperature acquisition is usually accuracy. Since changes in temperature only have low changes in voltage as a result (for both RTD and thermocouple), you have to be sure that the device is accurate enough.

What accuracy are you going for?

If you are >5 Degrees, i would think the 6009 could be sufficient. If you require more accurate measurements, it is possible that you require more specific hardware like the NI RTD Datalogger.  

hope this helps,

Norbert