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Thermistors are generally poorly suited for surface temperatureHi NG,
for a surface measurement application I need a thermistor (NTC) with a
fast response time of max. 200ms in liquids. Where can I buy such
things, any recommendations?
Thanks!
~Christian
Maybe a small Pt100 sensor, the bare unencapsulated kind? You'd need to putHi NG,
for a surface measurement application I need a thermistor (NTC) with a
fast response time of max. 200ms in liquids. Where can I buy such
things, any recommendations?
Thanks!
~Christian
Do you have any links, company names e.g. to such small and fastMaybe a small Pt100 sensor, the bare unencapsulated kind? You'd need to put
come kind of coating to seal the wires but the rest is already sealed with a
high temperature glaze, and the response speed and low cost of the smallest
types might make them ideal.
In addition to the fast response time (<166ms), the sensor needs to be
galvanically insulated, since I have to measure the temperature of a bare
DIE mosfet's source surface (I know, strange shit).
Nope, I looked at RS, but theyr range shrunk, it seems. Thing was about 5 mmLostgallifreyan schrieb:
Maybe a small Pt100 sensor, the bare unencapsulated kind? You'd need to
put come kind of coating to seal the wires but the rest is already
sealed with a high temperature glaze, and the response speed and low
cost of the smallest types might make them ideal.
Do you have any links, company names e.g. to such small and fast
sensors? A Pt100 would be suitable as well, but all of them I found on
the internet while googlin' seem to be slower than the NTCs available.
In addition to the fast response time (<166ms), the sensor needs to be
galvanically insulated, since I have to measure the temperature of a
bare DIE mosfet's source surface (I know, strange shit). I plan to apply
the sensor (thermistor or pt100) with a thermal conducting glue to the
surface, so maybe these glues are insulating, but I'm not sure about
that.
~Christian
Sphero,Here's one that claims to meet your stated requirements:
http://www.betatherm.com/datasheets/datasheet.php?p_id=90
I do know. But I need to feed the measurement results to a PC for** For god's sake man, forget thermistors or any other contact sensor -
use a bloody IR thermometer.
You do know what that is ?
Phil Allison schrieb:
** For god's sake man, forget thermistors or any other contact sensor -
use a bloody IR thermometer.
You do know what that is ?
I do know. But I need to feed the measurement results to a PC for
real-time analysis, so a IR thermometer with USB or RS232 interface is
needed. And these are waaaay to expensive, even those that do not match my
requirements in speed.
If you can show me a product that is fast enough and can be connected to a
PC running LabView, please please show me.
So the sensor is going to be permanately attach with glue ? No liquids ?Lostgallifreyan schrieb:
Maybe a small Pt100 sensor, the bare unencapsulated kind? You'd need to put
come kind of coating to seal the wires but the rest is already sealed with a
high temperature glaze, and the response speed and low cost of the smallest
types might make them ideal.
Do you have any links, company names e.g. to such small and fast
sensors? A Pt100 would be suitable as well, but all of them I found on
the internet while googlin' seem to be slower than the NTCs available.
In addition to the fast response time (<166ms), the sensor needs to be
galvanically insulated, since I have to measure the temperature of a
bare DIE mosfet's source surface (I know, strange shit). I plan to apply
the sensor (thermistor or pt100) with a thermal conducting glue to the
surface, so maybe these glues are insulating, but I'm not sure about that.
If all else fails consider AC excitation and transformer coupling. OrLostgallifreyan schrieb:
Maybe a small Pt100 sensor, the bare unencapsulated kind? You'd need
to put come kind of coating to seal the wires but the rest is already
sealed with a high temperature glaze, and the response speed and low
cost of the smallest types might make them ideal.
Do you have any links, company names e.g. to such small and fast
sensors? A Pt100 would be suitable as well, but all of them I found on
the internet while googlin' seem to be slower than the NTCs available.
In addition to the fast response time (<166ms), the sensor needs to be
galvanically insulated, since I have to measure the temperature of a
bare DIE mosfet's source surface (I know, strange shit). I plan to apply
the sensor (thermistor or pt100) with a thermal conducting glue to the
surface, so maybe these glues are insulating, but I'm not sure about that.