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  #1 (permalink)  
Old 11th April, 2005, 04:58 PM
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Thermal Probes

I've managed to completely naff up one of the thermal sensors that came with the integrated fan controller with my case (Silverstone Temjin TJ-05). They're hardwired in, which isn't a problem as i'm fairly handy with a soldering iron, but i've had a real hard time finding anywhere to buy the sensors from. Does anyone have any ideas? It needs to be the flat plastic type as it's the cpu one that i've bust.

Oh, forgot to add, i'm in the UK, so need a UK supplier. Thanks guys.
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Last edited by tottyspotter; 11th April, 2005 at 05:16 PM. Reason: Location
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Old 11th April, 2005, 07:30 PM
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Try to determine whether it's a thermocouple or a thermister. The shape doesn't really matter so long as you get the type right...
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Old 11th April, 2005, 08:06 PM
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Sounds like a thermistor (flat long clear orange/brown thing)
Take the damaged item down to a local maplin and they should have them.
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Old 11th April, 2005, 11:17 PM
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Nice one, thanks Graham. Yes, it is the flat long brown thing! Didn't even think of maplins, thought it would be some specialist online thing.
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Old 11th April, 2005, 11:38 PM
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OK, same story, flat-long-brown-thing, except im in Australia.

And mine, are not attached, they are two-pin plus, I could always murder the damaged ones for plugs, though.
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Old 19th April, 2005, 08:13 AM
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Ok, so I checked with Maplins, but they only do the bead type, plus they come with different resistances, so I couldn't be certain which type would work anyway. http://www.maplin.co.uk/Search.aspx?Criteria=thermistor

Emalied Silverstone, no response as yet. Any of you guys have any other ideas?
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Old 20th April, 2005, 10:18 AM
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*bump*
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Old 20th April, 2005, 11:29 AM
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Measure the resistance of one of the existing thermistors? That would allow you to see the expected range!
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Old 20th April, 2005, 11:36 AM
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Good idea, i'll do that tonight. Then any ideas where would I get the correct type from - I need the flat one rather than the round type.
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Old 20th April, 2005, 12:23 PM
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I think they are used in thermostats so if you know any plumbers it might be worth asking if they know anywhere
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Old 20th April, 2005, 01:32 PM
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I'll ask one of the guys I work with. He seems to do a hell of a lot of advanced DIY. I didn't even think of it before, but I work for a networking hardware repair company - even though it's not something we buy i'm sure if I asked one of our purchasers nicely they could have a look for one for me Just gotta get that resistance measurement first.
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Old 20th April, 2005, 04:19 PM
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Quote:
Originally Posted by Áedán
Measure the resistance of one of the existing thermistors? That would allow you to see the expected range!
No it wouldn't. Thermisters come in various forms, from ones designed to be near enough linear (for temperature measurement - you want one of these) to ones designed as trip-thermisters. Do you want one with a positive or negative coefficient? Do you want one tailored to break down at a certain temperature or one with a fairly linear response? What accuracy?

A series of pumps I've had to work with recently have a set of thermisters embedded in their motor windings. Only the vendor docs don't say they're thermisters but RTDs. Anyway, they have a positive coefficient and are designed to break down at somewhere in the region of 150C. The vital statistics are 300 Ohm at 25C, 1650 Ohm at 140C, 4kOhm at 150C and >12kOhm at 160C.

For computing purposes, you want one with a largely linear response and with similar resistances at similar temperatures.
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Old 20th April, 2005, 04:35 PM
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Hmm, this seems a lot more complicated than I initially anticipated. I can't believe no one has broken one of these and looked for replacements before! I guess i'll just have to wait on a response from Silverstone. Or hassle them a bit more ;-)
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Hyundai ImageQuest L90D+ 19" LCD


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