power control device

[alwaink]

Hi,

What kind of device should I look for if I want to control the voltage source feeding a gauge based on temperature readings?

What I'm trying to do is to ensure the internal temp of the gauge doesn't get too hot. So I want to have some kind of temp sensor to read the internal gauge temp and send the readings back to "the device." Based on the temp range, I want "the device" to switch on/off the power source feeding the gauge. Better yet, if the device can switch to different voltage levels. I'm looking at 120V or less, and 1-2A.

I've never done automation control, so I don't even know where to start. Please point me to right direction. Thank you in advance.

 

[jraef]

So you are OK with cutting power off to your gauge if it starts to get too hot? If so, the simplest method would be to just install a temperature switch in the gauge housing ahead of the incoming power lines. These devices are typically known as "klixons" (as in "clicks on") because a particular ubiquitous version made by Texas Instruments (now Sensata I think) is called that. If you Google kilxon you will find lots of offerings. they are a simple little switch that when warmed up beyond a predetermined threshold, i.e. your max. temp., simple pop and open the contacts, then stay open until the switch cools down again.

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[waross]

You may find it productive to spend some time browsing the omega.com web site.
respectfully

 

[alwaink]

Can I use a contactor in series with the power source? So that I can program my own temp range?

 

[Skogsgurra]

Yes. No probs. But then you need to know the temperature.

Gunnar Englund

http://www.gke.org

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100 % recycled posting: Electrons, ideas, finger-tips have been used over and over again...

 

[jraef]

If it's just a small amount of control power, i.e. 6A or less, you could get a Thermistor Tripping Relay, then select the right thermistor to give you the temperature range you are looking for.

Something like this;

http://www.sea.siemens.com/icc04/sec08/08-15_16.pdf

along with this

http://www.atpsensor.com/ptc/ptc_stdproducts/ptc_stdproducts_mps/mps.html

JRaef.com
"Engineers like to solve problems. If there are no problems handily available, they will create their own problems." Scott Adams
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