Cheap thermal measurement central

[djdamix]

I'd like to measure different point temperature in my PA : bridge rectifier, MOS, Heatsink ... ect and that's why I'm looking for a cheap thermal measurement central (from 4 to 8 channel). I don't need much precision (2 to 4°C precision is enough)

Thanks.
David

 

[amplifierguru]

Hi David,

I believe I know of just the device you're seeking, it's called a thermometer. Generally readily available made from an insulating material called glass and with (recently) non-toxic contents (red liquid). 4/8 of.

Hope this helps.

Greg

 

[djdamix]

I'd like to measure several points at the same time. I have on which uses 8 optical fibers but the fiber are expensive (250E) and can break very easily. That's why I am looking for a less expensive one, using thermocouple for example.

David

 

[Mr Evil]

You could get a multimeter and a bunch of thermistors. That's what I do. Thermocouples would work just as well, but thermistors are cheaper.

 

[wim]

Why don't you use the units that young peaple (case modders) use in their computer.

They have a display and are monitor 4 (or even more) temperatures at the same time, you can set an alarmbeep for each temperature and the units comes complete with thermocouples.

They can also swich fans automaticly when a temperature is higher than the setpoint you gave it.

Only a PSU.

 

[jackinnj]

LM34 for Fahrenheit, LM35 for Centigrade -- these are very commonly used by hobbyists.

http://www.national.com/appinfo/tempsensors/

 

[SY]

What works really well is the IR thermometers used in the food industry. They look like a little gun with a laser pointer. You point at whatever it is you want to measure the temperature of, pull the trigger, and you get a nice digital reading. Non-contact, no thermal inertia, instant response.

The unit I use was bought at a cooking supply shop for about $75. I mostly use it in the kitchen, but have smuggled it into my workshop on occasion.