How to install a temperature sensor

[abuhafss]

Hi

Can somebody guide me how can I install a temperature senor on a metallic body which be having temperature more than 200°C? Also what type of sensor would be suitable?

 

[(*steve*)]

My first suggestion would be a thermocouple. You would probably be looking for one with an insulated body (not a bare junction). Just bolt it to the metal body to ensure good thermal contact.

 

[henzbelmont]

I need the same piece of advice. How do i install a heat sensor to a room with multiple heat sources that are pretty much regularly pushed to their max levels?

 

[(*steve*)]

henzbelmont, in your case I would hang a thermometer on a suitable wall.

 

[henzbelmont]

henzbelmont, in your case I would hang a thermometer on a suitable wall.

Thanks Steve. Wonder why I hadnt thought of that

 

[(*steve*)]

Thanks Steve. Wonder why I hadnt thought of that.

Perhaps because you're a spammer?

But thanks for baiting me, I may not have noticed it otherwise.

 

[abuhafss]

Here is what seems to be suitable. The infrared sensing module is cheap but the reading/output circuit is expensive.

http://www.omega.com/ppt/pptsc_lg.asp?ref=OS102&Nav=temj11

 

[(*steve*)]

Did you check out thermocouples? Or do you want remote sensing of the temperature?

You can get a thermocouple and a digital temperature display for maybe $US20 to $US30. And they're OK up to over 1000C (other than the insulation on the wires)

 

[abuhafss]

You got the point, I need remote sensing.

 

[(*steve*)]

Any other requirements I need to guess?

 

[abuhafss]

The infrared sensor to be installed in the processing zone to monitor the temperature of removable hot metallic body. And the temperature reader/display to be installed on the control panel.

 

[(*steve*)]

The infrared sensor to be installed in the processing zone to monitor the temperature of removable hot metallic body. And the temperature reader/display to be installed on the control panel.

Can you explain why you need an IR sensor? Why can't you just attach a thermocouple? It would be a lot easier.

How far away is the control panel from the processing zone?

If you use an IR sensor, how close to the actual heated object can it be? What is the ambient temperature here?

 

[trobbins]

Why do you need remote sensing?

 

[abuhafss]

I think only a non-contact IR sensor can sense temperature of a removable body. In other words there would be different bodies.

The processing zone is 12" - 18" away from the control panel.

The sensor could be fixed at 2" - 6" away from the body.

The ambient temperature = 25°C - 30°C.

 

[(*steve*)]

Remote sensing adds a considerable degree of difficulty/cost factor unless you go a simple hand-held device.

Surely the "removable body" has to be mounted on something or has some means of afixing a temperature probe?

Here is one option for remote sensing of temperature. I always have a bad feeling when they ask you to "request a quote".

 

[abuhafss]

Surely the "removable body" has to be mounted on something or has some means of afixing a temperature probe?

Well, I had that idea. But, I wonder if a thermocouple fixed on the mounting of the hot body (instead of direct contact with the body) can give correct results. It is understood that the body and the mounting will have temperature difference.

I have no idea about the K-type thermocouple, whether simple touching of the probe will give correct results.

 

[(*steve*)]

Well, I had that idea. But, I wonder if a thermocouple fixed on the mounting of the hot body (instead of direct contact with the body) can give correct results. It is understood that the body and the mounting will have temperature difference.

I have no idea about the K-type thermocouple, whether simple touching of the probe will give correct results.

Perhaps if you asked rather than going off in search of some other "magic" method.

Have you wondered how accurate remote sensing of temperature is?

Have you indicated the accuracy you require?

Do you have a budget?

Can you Google?

edit: Can you describe the "metal body"?

(why do people have to be so secretive and obfuscate their intent?)

 

[abuhafss]

Frankly speaking, I never had a requirement of temperature monitoring. Therefore, my experience for remote or probe sensing is the same. I don't know how accurate both methods are.

I think 1°C - 3°C accuracy should be OK.

As far as the budget is concerned, I seek cheaper but reliable solution. Otherwise, I can go for RAYTEK or similar product.

Metal bodies are aluminum profiles and process is brazing.

 

[(*steve*)]

Various thermocouples are rated for up to about 1400 C. You can buy a meter that they plug in to for around $US20, or you can roll your own solution.

Attaching thermocouples to hot things is standard and well established practice.

The thermocouple junction is very rugged. The parts that give you their temperature rating is usually and covering over the probe and the sheath the wires are in.

 

[abuhafss]

By they way, just for my knowledge;

a) how accurate is the remote sensing?
b) what do you say about the accuracy of the results if I attach a thermocouple to the metallic clamp holding the aluminum profiles? To improve the results the material of the clamp can be changed, to aluminum or copper, if required.

Thanks