Author Topic: Which Raytec Infared thermometer to buy for pizza oven ?  (Read 3604 times)

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Offline canadianbacon

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Which Raytec Infared thermometer to buy for pizza oven ?
« on: January 27, 2005, 01:35:30 PM »
Hi guys,

I see Jeff is using a Raytec model of this infared non contact digital thermometer,
I found them here, - I'm guessing this is the their official site but maybe not:
http://www.infrared-usa.com/default.asp

Which model do you suggest buying ?

Mark
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Offline Steve

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Re: Which Raytec Infared thermometer to buy for pizza oven ?
« Reply #1 on: January 27, 2005, 02:34:33 PM »
I purchased this one:

http://www.extech.com/instrument/products/400_450/42530.html

I believe I paid $75 for it. And it's VERY accurate.

Bought it from:

http://www.testequipmentdepot.com/extech/thermometers/42530.htm
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Offline varasano

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Re: Which Raytec Infared thermometer to buy for pizza oven ?
« Reply #2 on: January 28, 2005, 03:23:15 PM »
I bought the ST20 for about $180 3 years ago. Looks like they have come down in price. The one steve shows is a different brand, but probably works exactly the same. The good news is that you don't need 100% accuracy, only relative accuracy. You'll be comparing reads against yourself as you go from pie to pie, so any brand is probably fine. I'd buy Steve's at the better price.

Jeff

Offline varasano

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Re: Which Raytec Infared thermometer to buy for pizza oven ?
« Reply #3 on: January 28, 2005, 03:26:14 PM »
Quick note on IR thermometers.  The work on radiant heat (basically by color, but in an invisible range).  So they can sometimes read the temp of reflected heat.  If you point at foil or metal, it's probably reading what is reflected. So if you heat up a dry pan and point it, it may say it's cool because it's telling you the temp of the ceiling.  They are fascinating little gadgets.

Jeff

Offline canadianbacon

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Re: Which Raytec Infared thermometer to buy for pizza oven ?
« Reply #4 on: January 28, 2005, 03:31:49 PM »
I'm not sure I am following the gist of your post, are you saying that they are prone to errors, this seems to be
what you are getting at, so I should not be pointing it at the foil etc.... but now I wonder will they give accurate
results if just pointed at the pizza or the stone ?  ???

« Last Edit: January 28, 2005, 03:35:18 PM by canadianbacon »
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Offline Steve

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Re: Which Raytec Infared thermometer to buy for pizza oven ?
« Reply #5 on: January 28, 2005, 03:42:04 PM »
I have had no problems with mine giving false readings.
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Offline varasano

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Re: Which Raytec Infared thermometer to buy for pizza oven ?
« Reply #6 on: January 28, 2005, 03:52:35 PM »
They are very accurate, but when pointed at something shiny and metal they give the temp of whatever is reflected, just like a mirror.   When pointing at a foil covered stone they will report on the temp of the oven roof. The stone is probably way cooler. But that's no problem. That's what you want. When you take the foil off using tongs, then repoint it at the stone, it will probably be 150F lower. more or less.  That's great, because that differential is what you need.

Bottom line is that you have to get used to this process. Your oven may vary from mine.

But overall the IR thermometers are very accurate. They are very cool gadgets. Kids will get endless pleasure out of pointing at each other's butts :-) They work on color so distance is no barrier. If you point them at the sky they will go off the charts low (space is cold). You can take the temp of the moon. Of a building a mile away, whatever. They work on what's called the 'black body effect' which says that something's peak radiant color is determined by it's temperature. So white light tells us the temp of the surface of the sun. Heat metal to the same temp and it's the same color.  A regular lightbulb filament is super hot, (like 2500F) which is why it glows white.


Offline canadianbacon

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Re: Which Raytec Infared thermometer to buy for pizza oven ?
« Reply #7 on: January 28, 2005, 03:54:53 PM »
oh cool !  :D  Thanks for that great explaination !

I feel much better now..... woooo I want one.... it will be soon :-)

Thanks again for clarifying that
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