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which is the most accurate means of measuring the temperture of liquids?


Question by sagara: which is the most accurate means of measuring the temperture of liquids?
i have precisely measured liquids, dilluted chemicals in equally shaped and volume containers.

i dont have access to specializied scientific equipment. i am thinking that my choices are either, a infrared thermometer or a weather themometer.

which gives more accurate temperture readings for my situtation. please be elaborate in your suggestions and instructions. one concern i have for this scenerio is that the surface temperture of the liquid will not neccessarily be homogenizied with the rest of the liquid. Can i overcome this by taking multiple readings? Aggitation? Mixing?
the chemicals im measuring are used in photodevlopment. i hope to experiment with a variety of tempertures to see what devlopes the most aethetically pleasing results.

Best answer:

Answer by Pathankrious Shark.
Most electronic thermometers at pretty accurate…although if you do not have one on hand…mercury thermometers are best, because they can go to temperatures of -40 before freezing.

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Question by Meilien: Non paranormal explanations for “cold spot” in room?
There is a regular ordinary room. It used to be a bedroom but is now a family den.

For some inexplicable reason there is a section of the room that is 2 deg C colder than the rest of the room. The cold section is the exact size and shape of the bed that used to stand there (There’s a book shelf and a gaming chair there now). If you move a thermometer (digital, or mercury) into the cold sport it will drop in front of your eyes, but if you move it an inch to the side (outside of the cold section) it will go back up again.

If you use a thermal imaging camera (Local hardware store that rents them out for nighttime wildlife tours) you can see the cold spot clearly. And it’s the size and shape of the bed that use to be there.

The wall behind it is an internal wall that backs on to a heated room, and it’s not cold to the touch. A smoke candle shows that there are no droughts in the room (The windows are double glazed and sealed, there is no AC and no vents of any kind).

The cold spot is in direct sunlight a lot as it’s south facing.

The floor under the cold spot feels the same tempreature as the floor in the rest of the room (It’s shag carpet). There is a heated kitchen under it, the same as the rest of the room (No cold spots on kitchen ceiling or in kitchen). There is no crawl space under the floor, and no cold water pipes or anything that might cool the room down.

Strangely, an infrared thermometer doesn’t register the cold spot at all, it just reads the wall behind it (which is normal tempreature). But it does register that anything put inside the cold spot is about 2 deg C colder than when the object is outside of the cold spot.

I’m familiar with the paranormal explanations (I’ve never seen a ghost, and I think that the supposed hauntings that you see on TV bunk) but what are some non paranormal explanations?

Nothing “bad” ever happed in the room. Nobody ever died in it or anything. The house is a new build, less than 5 years old and nobody else ever lived there before. The bed was new, too. It’s now in another room, and it seems perfectly normal. No cold spots or anything. The land that the house was built on is perfectly ordinary land. It’s not Indian land, or anything like that. Before the house was built it was just scrub land. And there is no record of anything “bad” having happened there.

Spot has remained cold for the last 3 months, ever since the bed was moved. The tempreature difference between it and the rest for the room is constant day and night, summer and winter.
Moving the bed back does nothing. Still cold.
How is it even possible to use a mercury thermometer incorrectly? You put it in the cold area and watch the level drop, you move it out and watch it rise.

Same for a thermal imaging camera designed for tourists. There’s an on/off button and a zoom control. That’s it.

Best answer:

Answer by Boz
You know – I’ve been looking into this for some time – the physics of what people think is ghosts or the paranormal – I have an idea that there is a quantum mechanical explanation for the kind of thing that you are describing though I don’t know how it works. It maybe that somehow the environment is able to “remember” energy of an object that has been there – rather like how a videotape plays back video – this makes more sense to me than “ghosts” or the paranormal – see below

Also check out the MIT guy “US” answer to the following question:
http://answers.yahoo.com/question/index;_ylt=AmYdRcatqTvDYKxgFO0Lc7bsy6IX;_ylv=3?qid=20091218115705AA8KpWB&show=7#profile-info-KqttDM5raa

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Can you get an accurate tempurature reading by….?


Question by Carrie: Can you get an accurate tempurature reading by….?
My science project requires me to take the temperature of irregular objects like rubber, plastic, painted metal, glass, and a plant. what can i use to take the temperature of them???
i was thinking i could use one of those infrared thermometers, but theyre way too expensive….
can i get an accurate reading by cutting it in half then sticking the thermometer inside the slit i cut??
or can i use those thermometers you use when you get sick that you rub across your forehead??
thanks for any real help!!!! :)

Best answer:

Answer by Chandramohan P.R
Taking reading after cutting a substance is not permitted,You have to find a way to measure it.(Non destructive method)
Body thermometers have limited range. So they can not be used.
You can use some paste like thing to stick the thermom eter on the surface wait for few minutes then take reading.
I have seen instrument technicians using some rubbber like compound called Putty(?)

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Herschel Infrared Experiment?


Question by Peter: Herschel Infrared Experiment?
For the Herschel Infrared Experiment, in the materials it tell me to use alcohol thermometers. Does regular thermometers from Walmart work the same and has the same result?
These are the websites that tell the procedures and materials: http://eo.nso.edu/ret/seddon/Herschel.html

http://www.ipac.caltech.edu/Outreach/Edu/Herschel/backyard.html

Best answer:

Answer by jpopelish
All thermometers measure temperature. They differ in how much infrared they absorb, but his experiment specifies that you paint the sensing end of the thermometer black, so that this difference is eliminated. Any thermometer with a similar sized sensing tip will work.


Regards,

John Popelish

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Q&A: CAT diesel engine trouble.?


Question by mike: CAT diesel engine trouble.?
I recently purchased a CAT turbo diesel generator. I checked the oil and it had water in it. After a good bit of clear water came out the oil started to drain. It could best be described as the color and consistency of a vanilla milk shake. I was told by a friend to mix some diesel with the oil and agitate it to mix it up, then to drain the oil. After the system was clear, i put fresh oil in until it reached the fill line. I started up the engine and let it run for about two hours. It was smoking white from the exhaust stack. I have also noticed that there is oil dripping from the exhaust stack. There also seems to be oil leaking from the turbo. Could this oil leak be causing the white smoke? I remained curious so i grabbed an infrared thermometer and started checking around. The exhaust manifold around the number 1 cylinder was about 100 degrees cooler than the other 3 cylinders. What the heck is going on? help would be much appreciated!
I don’t believe that the water came from the radiator. It was clear water with no antifreeze and the radiator is full to the neck. This leads me away from the head gasket/cracked cyl.head theory. On closer inspection, the smoke appears to have a blue tint and smells like burning oil. There is oil bubbling from the loose connection between the turbo and the intake manifold; there is also oil leaking from the exhaust stack. If this is causing the smoking problem, what will be involved in repairing the turbo? Why would i have the lower temp reading on only the number 1 cylinder?
Took the intake loose from the turbo… the shaft has a bout an inch of play in it, so i guess the bearing is bad. I will probably have to replace the whole turbo. That explains why there is so much oil in the exhaust. This still doesn’t explain why the number 1 cyl is cooler than the others. I am going to do a compression check on that cyl and i will keep posting. Any suggestions would be great help!

Best answer:

Answer by dodge man
i think you might have a cracked block in this one ,that’s one of the faults to those,the blocks was thin,and if not maintained right they would freeze up,the reading you got on the one cylinder may be the cylinder the problem is in also,i bought one of these at a salvage sale,and never did get it to run right,sold it to a friend,and when he tore it down it had a crack in the head and the block,you need to check yours out real good,you may have more problems than its worth,those are expensive to work on also,parts are very high,so be careful,and don’t get in too deep on it,good luck with it.

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Q&A: Do any know how to put certain words in a story?


Question by babyphatluffer: Do any know how to put certain words in a story?
I need to make a story with and of the following words electromagnetic waves,radiation,infrared,ultraviolet radiation,greenhouse effect,thermal energy,temperature,thermometer,heat,conduction,convection,wind,
anemometer,wind-chill-factor,local wind,sea breeze,land breeze,
monsoon,global wind,coriolis effect,latitude,jet streams,evaporeation,humidity,relative humidity,phsychrometer,condensation

CAN YOU GUYS PLEAZZZZZZZZZZZ HELP ME OUT IT CAN BE A STORY REPORT PHARAGRAPH U NAME IT AS LONG AS IT HAS THESE WORDS.
ok it doesn’t have to be all of these words
just use as many as u can.

Best answer:

Answer by hollabak_at_me
wow.;….

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Question by rob: can i use a regular infrared light for my snake or will it be to light at night?
ive been useing a regular infrared light all the time for my snake(ball python) its extremely powerful but i keep it far enuff away that the thermometer at the botton never goes below 85 or over 90 but he doesnt like to come out of his hide even at night when the regular light is off i got one of those 100 watt ones you get from the pet store with the darker red tint but it does not keep his tank warm enuff so i switched back to the industrial one i was just wondering if im giving him 24 hour light by useing this one do i need to get a night light specific infrared or will any work at night

Best answer:

Answer by Isodora
As long as the watts are correct, you can use an infrared. Snakes can’t see that light, so it will give the snake a realistic sense of day and night. Good luck!

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Question by rob: am i useing an infrared thats to powerful for my snake?
the infrared light i have is at least 250 watts probly like 500 or so tho(its old and has no labels besides infrared heat emitter and its pretty big about 2.5 times the size of a regular bulb if you put your hand an inch infront it will be way too hot to stand in seconds) i keep it a few feet above his tank and the thermometer towards the bottom never gets warmer than 90 usually about 85-88 but will this burn his skin even though its not too hot in the tank i read 100-150 watts for the 30 gallon i have a 100 watt and the tank will drop to about 75 with this directly ontop of the screen it drops to like 67 at night so i stopped useing it the 2nd day i had it

Best answer:

Answer by Derk
I use a UTH heater attached to a themorsstat on the bottom of the tank, and a 40 or 50 watt red bulb to make a hot spot and thats on a dimmer to make it about 50% power.

250-500 in my opinion will be way to hot for a snake. It really doesnt matter what the wattage is that is not what you measure. the important part is the temps in the tank, both air and floor temps. I suggest you get a stick on wall themometers to measure the air teams, and an infrared themometer (less the 20$) to measure the floor temps.

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Question by Kim: Where do i stick the thermometer probes with undertank heaters?
i have 2 undertank heaters side by side on 2/3 of my 55 gallon tank, and an infrared light on the hotside.. i am wandering where to stick tyhe thermometers to read the temps more accurately

i have reptibark, so do i put the first digi thermometer on the cool side under the substrate or ontop of it? and if i put it under should i let it go over a couple degrees to let it go through the substrate, and should i have my heating pads stick to the glass or have like an inch away from the glass?

and where should i put the hot side probe with the light? ontop of the substrate?

Best answer:

Answer by Michael D
that is a tough one the probes are for long term monitoring on the cool side it doesn’t really matter as long as they are anchored down pretty good. I don’t know what kind of animal you have but covering 2/3rds of the bottom of the tank seems like overkill. 1/3 would be more like it, but like i said i dont know what kind of animal you have. just ask around on the forums. the heaters are designed to stick to the bottom of the tank, flat up against the glass. these get very hot and if the substrate gets disturbed it can lead to serious burns. they sell thermostats to control the temps, but that is assuming you have a static setup, ie the substrate remains at the same level all the time. as it gs packed down it loses its insulation capabilities and gets hotter. at a minimum i would get a lamp dimmer (lowes and home depot sells these) it plugs into your outlet, and your heating pad plugs into it. a slider controls the voltage to the pads. put the temp probes in areas where your animals hang out the most. make sure to anchor them so they don’t move. just under the substrate is fine, subtract a couple of degrees and you should get surface temp. the most important thing is to get an IR temp gun (-20) at harbor freight tools this will measure the surface temps over a wider area. it is instant, and you can measure from several inches away without touching the substrate. no reptile keeper should be without one. you can find deadly hot spots, or cold areas instantly before our pet gets fried.
good luck
mike

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what is the emissivity value of hk-40 metal alloy?


Question by budhiman: what is the emissivity value of hk-40 metal alloy?
I am working in a refinery where we are using infrared thermometers to take the temperature of reformer tubes.so we have to input the emissivity value of reformer tube to that instrument.we using hk-40 alloy for reformer tubes.

Best answer:

Answer by genericman1998
I couln’t find emissivity for HK-40 doing an internet search. You might try looking for emissivity of similar alloys; CK-20 and 310S are fairly close in composition to HK.

Also, you’re probably aware that the emissivity will depend on the temperature, and whether the surface is polished or oxidized. If somebody gives you a value, it should be for your operating temperature and surface condition.

Sorry I couldn’t help you more.

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