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 Post subject: Surface thermometer
PostPosted: Fri Oct 04, 2019 8:21 am 
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Joined: Fri Mar 17, 2017 8:42 pm
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First name: Pierre
Last Name: Castonguay
City: Québec, Qc
Country: Canada
Focus: Repair
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Hello friends,

For those that do use them, what do you guys and gals use as surface thermometers? StewMac has one, is that the only game in town? Anyone using one of those cheap infrared gun types?


Pierre
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 Post subject: Re: Surface thermometer
PostPosted: Fri Oct 04, 2019 2:06 pm 
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Joined: Mon Oct 17, 2011 4:10 pm
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I have used both the bimetal one like stewmac’s and the electronic one. The bimetal curl thermometer seems to report close to the correct temperature (at least of the air near the surface) but I have never calibrated it against something known like boiling water. The electronic one with the laser pointer reflects off of anything metal so it won’t give accurate readings of my bending iron. While I was curious to see what temperatures I was bending at, I still go with how the bend feels to know if the temperature is sufficient. I rarely use either thermometer in my shop although I have them.


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 Post subject: Re: Surface thermometer
PostPosted: Sat Oct 05, 2019 10:49 am 
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I'd primarily use it to unglue fingerboard and lifting bridges, and I'm typically using a clothes iron or light bulbs, so metal temp is not a strong concern for me.


Pierre
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 Post subject: Re: Surface thermometer
PostPosted: Sun Oct 06, 2019 8:04 am 
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First name: Pierre
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Anyone else has experience with surface thermometers for my intended purpose?


Pierre
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 Post subject: Re: Surface thermometer
PostPosted: Sun Oct 06, 2019 1:51 pm 
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Location: Southeast US
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IR thermometers will read the surface temperature of just about anything. We used them at work for years to check for hot spots in our machines; I use one in the shop primarily when removing bridges and fretboards with a heatlamp.

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These users thanked the author SteveSmith for the post: Smylight (Sun Oct 06, 2019 4:11 pm)
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 Post subject: Re: Surface thermometer
PostPosted: Sun Oct 06, 2019 4:12 pm 
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First name: Pierre
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SteveSmith wrote:
IR thermometers will read the surface temperature of just about anything. We used them at work for years to check for hot spots in our machines; I use one in the shop primarily when removing bridges and fretboards with a heatlamp.


Exactly what I was looking for. Thanks Steve. So those cheap IR units will do the job, I suppose?


Pierre
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 Post subject: Re: Surface thermometer
PostPosted: Sun Oct 06, 2019 5:46 pm 
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They're not dependable for high accuracy but they'll give you a good general idea of the temp in an area.

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These users thanked the author SteveSmith for the post: Smylight (Sun Oct 06, 2019 9:02 pm)
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 Post subject: Re: Surface thermometer
PostPosted: Sun Oct 06, 2019 9:02 pm 
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Great, thanks.


Pierre
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 Post subject: Re: Surface thermometer
PostPosted: Mon Oct 07, 2019 10:55 am 
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Steve, Do you think they would be +/- 10 degrees ? THANKS
SteveSmith wrote:
They're not dependable for high accuracy but they'll give you a good general idea of the temp in an area.

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 Post subject: Re: Surface thermometer
PostPosted: Mon Oct 07, 2019 12:45 pm 
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It's been 7 years since I retired, but my company performed infrared scans of various things. We used hand held scanners for many things, and the small pistol grip infrared thermometers for others. The small ones you can by locally, like this one

https://www.lowes.com/pd/Digital-Temperature-Meter/3028851

were within about 1.5 degrees of accurate. You have to understand a little about infrared, but generally it depends on the surface you are scanning. Metal and glass don't register accurately, but things like wood, plastic, drywall, paint are pretty close. Just don't get the laser aiming light anywhere near metal and you should be OK

And things may have changed in the last 7 years.

Ed



These users thanked the author Ruby50 for the post: Smylight (Tue Oct 08, 2019 7:47 am)
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 Post subject: Re: Surface thermometer
PostPosted: Mon Oct 07, 2019 1:16 pm 
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Dave Rickard wrote:
Steve, Do you think they would be +/- 10 degrees ? THANKS
SteveSmith wrote:
They're not dependable for high accuracy but they'll give you a good general idea of the temp in an area.
Like Ed said, within a few degrees. The cheap one I use in the shop I figure is within 5 degrees. Main thing to keep in mind is what you are measuring is the temperature at the surface.

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