ausmini :: View topic - Infra-red thermometers

Nice and cheap that!

As the text in the link states, these fixed emissivity readers are only correct for rough, dark surfaces. For a tyre they would be great. For the surface of a brake rotor they would be quite inaccurate. For things in between like a hot exhaust, their accuracy would depend on the surface coating of the object being measured.

Just because it has a digital readout with many digits doesn't meant the number is right.

M

Author:	drmini in aust [ Fri Mar 22, 2013 3:21 pm ]
Post subject:	Infra-red thermometers
There was a thread a while back where I listed a jaycar one for $50. Her's one like I just bought from my local bearing shop: http://microtempusa.com/micro-temp-ther ... mt100.html A$29 he sells for, cheaper for ca$h...

Author:	Mokesta [ Fri Mar 22, 2013 3:28 pm ]
Post subject:
Nice and cheap that! As the text in the link states, these fixed emissivity readers are only correct for rough, dark surfaces. For a tyre they would be great. For the surface of a brake rotor they would be quite inaccurate. For things in between like a hot exhaust, their accuracy would depend on the surface coating of the object being measured. Just because it has a digital readout with many digits doesn't meant the number is right. M

Author:	drmini in aust [ Fri Mar 22, 2013 3:30 pm ]
Post subject:
All I bought it for was radiator temp so it should be OK. or near enough...

Author:	9YaTaH [ Fri Mar 22, 2013 6:46 pm ]
Post subject:
drmini in aust wrote: All I bought it for was radiator temp so it should be OK. or near enough... Gawd!! Issy would be horrified at what you Boffins are doing to his beloved Brick

Author:	drmini in aust [ Fri Mar 22, 2013 6:59 pm ]
Post subject:
9YaTaH wrote: drmini in aust wrote: All I bought it for was radiator temp so it should be OK. or near enough... Gawd!! Issy would be horrified at what you Boffins are doing to his beloved Brick It allows me to check the accuracy of the Verrrry British Smiths temperature gauge and its 1950s (40s?) design `voltage stabilizer' Also handy on the street for checking whether chicks are hot, or not...

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Infra-red thermometers https://www.ausmini.com/forums/viewtopic.php?f=2&t=80811	Page 1 of 1

Author:	smac [ Sat Mar 23, 2013 5:50 am ]
Post subject:
Mokesta wrote: Nice and cheap that! As the text in the link states, these fixed emissivity readers are only correct for rough, dark surfaces. For a tyre they would be great. For the surface of a brake rotor they would be quite inaccurate. For things in between like a hot exhaust, their accuracy would depend on the surface coating of the object being measured. Just because it has a digital readout with many digits doesn't meant the number is right. M The reading I've done (which I'm damned if I can find now) indicated that while they are less accurate measuring 'reflective' surfaces, this error will be quite small %-wise. This seems to be the case testing the unit I have - if I check a variety of surfaces sitting at room temperature, including everything from gloss tiles to wood to paper to carpet, the variance is less than half a degree. This has been true outside in winter (less than 10c) and summer (over 30c inside).

Author:	CPOCSM [ Sat Mar 23, 2013 9:05 am ]
Post subject:
We used raytek temp readers with defence as they were compact and gave accurate readings. I suppose it is a moot point having one when you are seeing the paint blistering off a ships bulkhead though Hooroo

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