More frivolous purchases, stuff you don't need..
Discussion
gazapc said:
pixelatedJH said:
A laser thermometer. No, I don't know why. What I do know, however, is the precise temperature of everything, living or otherwise, in line of sight of my chair...
https://www.amazon.co.uk/gp/product/B01N7FGBFS
Purchased at 2105 this evening. Prime delivery is scheduled for tomorrow (monday). In fact ordered two, one as a present.https://www.amazon.co.uk/gp/product/B01N7FGBFS
Top Banana said:
Sorry to burst your bubble but you wont be getting the precise temperature of anything...not unless you set the emmisivity (thats if you can set the emmisivity value with this actual device)
The problem with infra-red thermometers is that although all objects emmit IR they do so at different emmisivity values. These can be dramatically different and if you don't set an accurate emmisivity value for the material you are measuring then you can have errors as big as 30 degrees difference. I sell IR thermometers and thermal imaging cameras and am constantly explaining to potential customers that IR temperature measurement is a tricky subject with regards to accuracy.
Even with the emmisivity set accurately for the material to be measured and assuming you are exactly 90 degrees angle to the material surface, and also you know the spot measurement area of the optics then the best accuracy you can get will be around +/- 2 degrees centigrade..
That's your 5 minute lesson in basic IR thermometry over...
This is all true however if you have a four cylinder engine with a misfire it is a piece of piss to see which of the four downpipes is slightly cooler than the other three The problem with infra-red thermometers is that although all objects emmit IR they do so at different emmisivity values. These can be dramatically different and if you don't set an accurate emmisivity value for the material you are measuring then you can have errors as big as 30 degrees difference. I sell IR thermometers and thermal imaging cameras and am constantly explaining to potential customers that IR temperature measurement is a tricky subject with regards to accuracy.
Even with the emmisivity set accurately for the material to be measured and assuming you are exactly 90 degrees angle to the material surface, and also you know the spot measurement area of the optics then the best accuracy you can get will be around +/- 2 degrees centigrade..
That's your 5 minute lesson in basic IR thermometry over...
gazapc said:
gazapc said:
pixelatedJH said:
A laser thermometer. No, I don't know why. What I do know, however, is the precise temperature of everything, living or otherwise, in line of sight of my chair...
https://www.amazon.co.uk/gp/product/B01N7FGBFS
Purchased at 2105 this evening. Prime delivery is scheduled for tomorrow (monday). In fact ordered two, one as a present.https://www.amazon.co.uk/gp/product/B01N7FGBFS
Top Banana said:
Sorry to burst your bubble but you wont be getting the precise temperature of anything...not unless you set the emmisivity (thats if you can set the emmisivity value with this actual device)
The problem with infra-red thermometers is that although all objects emmit IR they do so at different emmisivity values. These can be dramatically different and if you don't set an accurate emmisivity value for the material you are measuring then you can have errors as big as 30 degrees difference. I sell IR thermometers and thermal imaging cameras and am constantly explaining to potential customers that IR temperature measurement is a tricky subject with regards to accuracy.
Even with the emmisivity set accurately for the material to be measured and assuming you are exactly 90 degrees angle to the material surface, and also you know the spot measurement area of the optics then the best accuracy you can get will be around +/- 2 degrees centigrade..
That's your 5 minute lesson in basic IR thermometry over...
Interesting! You learn something every day. I shall have to frivolously purchase a different type of thermometer so I can investigate further The problem with infra-red thermometers is that although all objects emmit IR they do so at different emmisivity values. These can be dramatically different and if you don't set an accurate emmisivity value for the material you are measuring then you can have errors as big as 30 degrees difference. I sell IR thermometers and thermal imaging cameras and am constantly explaining to potential customers that IR temperature measurement is a tricky subject with regards to accuracy.
Even with the emmisivity set accurately for the material to be measured and assuming you are exactly 90 degrees angle to the material surface, and also you know the spot measurement area of the optics then the best accuracy you can get will be around +/- 2 degrees centigrade..
That's your 5 minute lesson in basic IR thermometry over...
gothatway said:
poing said:
I really wish you hadn't posted the link - click link "ooh it's only £10", click one button purchase thingy, email confirmation 5 seconds later. I wonder if the delivery will arrive Monday since it's a holiday day?
I did exactly that at 9:45 yesterday evening, and it's just been delivered at noon today (Sunday). Got yours yet ?
The joys of living rural Scotland! On the plus side I complained and got another month of Prime for free, that's now 8 months free for things not arriving 
Wish said:
gazapc said:
gazapc said:
pixelatedJH said:
A laser thermometer. No, I don't know why. What I do know, however, is the precise temperature of everything, living or otherwise, in line of sight of my chair...
https://www.amazon.co.uk/gp/product/B01N7FGBFS
Purchased at 2105 this evening. Prime delivery is scheduled for tomorrow (monday). In fact ordered two, one as a present.https://www.amazon.co.uk/gp/product/B01N7FGBFS
As a new father I don't spend money on myself any more, I did see a nice seiko divers watch in John Lewis on my lunch break that was a bargain at half price but instead I carried out my instructions and collected the sleepyhead grand for my daughter.
For those that don't know, a sleepyhead is a very expensive baby pillow for them to sleep in.
For those that don't know, a sleepyhead is a very expensive baby pillow for them to sleep in.
Pete-mojsh said:
As a new father I don't spend money on myself any more, I did see a nice seiko divers watch in John Lewis on my lunch break that was a bargain at half price but instead I carried out my instructions and collected the sleepyhead grand for my daughter.
For those that don't know, a sleepyhead is a very expensive baby pillow for them to sleep in.
Ah, not a large piano for insomniacs then?For those that don't know, a sleepyhead is a very expensive baby pillow for them to sleep in.
epom said:
Wish said:
gazapc said:
gazapc said:
pixelatedJH said:
A laser thermometer. No, I don't know why. What I do know, however, is the precise temperature of everything, living or otherwise, in line of sight of my chair...
https://www.amazon.co.uk/gp/product/B01N7FGBFS
Purchased at 2105 this evening. Prime delivery is scheduled for tomorrow (monday). In fact ordered two, one as a present.https://www.amazon.co.uk/gp/product/B01N7FGBFS
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