m0pdq

hi all

sorry if the answer is obvious, but what is a Pyrometer, and what does it measure ?

http://forums.nasioc.com/forums/show...8&page=1&pp=25

left hand guage first picture.

thanks

Chris

chris's scooby

Nice to see the USDM cars get cruise control...

Midlife......

iTrader: (2)

As fas as my a-level physics went a pyrometer measured temperature via colour change (measuring the temp of a furnace etc.)

Maybe not in this case...LOL

Midlife.....

Steve vRS

Quite right Midlife.

It measures the temperature of metal as metal glows different colours depending on the temperature. Each metal has it's own emisivity and so the pyrometer needs to be calibrated to the metal that you are measuring.

I used to use them on steel mills to determine the temperature of 30 tonne ingots of stainless steel as they emerged from a reheat furnace. 1200degC and I was bloody hot!

Steve

Midlife......

iTrader: (2)

Thanks Steve It's nice to know that some A-level physics still linger from when I took them in 1978 !!

Errrrr You found a type R like faster mike's then ???

Cheers

Shaun

korky

A pyrometer is a metallic measuring device used to measure temperature.

If you rivet two strips of steel together but one of the strips is made of a different compound then they will expand at different rates. If they are riveted together then the only way the device can deflect is by bending.

It follows that the hotter the device gets the more it will deflect.

If you convert the deflection into an electrical signal then the output will be dependant upon temperature.

We have a temperature gauge .

Looking at the picture, the temp gauge and the pyromer are both showing 'mid range' so I might even be right!

Cheers,

Korky

T5NYW

iTrader: (4)

Not exactly we use them to determine the Temperature of Plastics 50 - 200 C

IIRC

Optical Pyrometers compares the wavelength emissions of a hot object in view to a calibrated Filament within the Pyrometer. Optical Filters restricts the wavelength to give the sensor it's Temperature range. A bandwidth of 0.60-0.65 micons is the Red region of visable light. This measure items that would be incandescent and but not read the lower end of temperature.

Some Pyrometers change the Lamp filaments current to match the 'brightness' of the hot Object in view. The current change determines the Temp of the object.

Others Pyrometesr use its own Magic Box in a Panel that gives a 4-20mA signal to PLC or PC.

Tony

Steve vRS

A bi-metalic strip is a thermostat.

Steve

Midlife......

iTrader: (2)

http://www.omega.com/literature/tran...mometers1.html

seems to give a good background to the pyrometer......

Just had a thought, "pyrometer" might be the name of the manufacturer. My boost gauge says "Autometer" accross the front !!

Midlife.....

TonyBurns

iTrader: (3)

It looks similar to that of an EGT gauge (same sort of range on it) plus that measures heat also

Tony

starship impreza

iTrader: (1)

Agree with Tony that is what we call an EGT .i know cos i have just ordered
my autometer gauges from the states an the pyrometer is defo EGT
and just to prove it take a look at the pic
Gary