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IR thermometers
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RichD
Jun 26, 2021, 1:29:20 PM6/26/21
to
I wonder about those IR thermometers so prevalent
during the past year. Previously, I recall seeing them
at deli salad bars, used to monitor the sour tureens.
I understand the physics, the relationship between
spectrum and temperature. What is the accuracy,
considering the problems of focus and reflection,
and ambient noise?
What's the internal sensor?
--
Rich
during the past year. Previously, I recall seeing them
at deli salad bars, used to monitor the sour tureens.
I understand the physics, the relationship between
spectrum and temperature. What is the accuracy,
considering the problems of focus and reflection,
and ambient noise?
What's the internal sensor?
--
Rich
Lu Wei
Jun 27, 2021, 10:25:00 PM6/27/21
to
On 2021-6-27 1:29, RichD wrote:
> I wonder about those IR thermometers so prevalent
> during the past year. Previously, I recall seeing them
> at deli salad bars, used to monitor the sour tureens.
>
> I understand the physics, the relationship between
> spectrum and temperature. What is the accuracy,
> considering the problems of focus and reflection,
> and ambient noise?
>
The accuracy is not good to my impression, but it's just for quick
> I wonder about those IR thermometers so prevalent
> during the past year. Previously, I recall seeing them
> at deli salad bars, used to monitor the sour tureens.
>
> I understand the physics, the relationship between
> spectrum and temperature. What is the accuracy,
> considering the problems of focus and reflection,
> and ambient noise?
>
scanning. And they usually have no emissivity setting (I guess they are
fixed to 0.95 or so).
> What's the internal sensor?
>
--
Lu Wei
IM: xmpp:luwe...@riotcat.org
PGP: 0xA12FEF7592CCE1EA
Phil Hobbs
Jul 1, 2021, 9:25:09 PM7/1/21
to
Lu Wei wrote:
> On 2021-6-27 1:29, RichD wrote:
>> I wonder about those IR thermometers so prevalent
>> during the past year. Previously, I recall seeing them
>> at deli salad bars, used to monitor the sour tureens.
>>
>> I understand the physics, the relationship between
>> spectrum and temperature. What is the accuracy,
>> considering the problems of focus and reflection,
>> and ambient noise?
>>
> The accuracy is not good to my impression, but it's just for quick
> scanning. And they usually have no emissivity setting (I guess they are
> fixed to 0.95 or so).
>
>> What's the internal sensor?
>>
>
So much of the 'precautions' of the last year or more have been pretty
> On 2021-6-27 1:29, RichD wrote:
>> I wonder about those IR thermometers so prevalent
>> during the past year. Previously, I recall seeing them
>> at deli salad bars, used to monitor the sour tureens.
>>
>> I understand the physics, the relationship between
>> spectrum and temperature. What is the accuracy,
>> considering the problems of focus and reflection,
>> and ambient noise?
>>
> The accuracy is not good to my impression, but it's just for quick
> scanning. And they usually have no emissivity setting (I guess they are
> fixed to 0.95 or so).
>
>> What's the internal sensor?
>>
>
much theatre. Even if the IR gun was perfectly accurate, and
irrespective of my state of health, the temperature of my forehead when
I've just come in from outside is going to be quite different between
January and July.
Cheers
Phil Hobbs
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