what are the types of external micrometer?
479107
I bought a real nice digital one on ebay (imported from Hong Kong) for about £14 ($20 ish) - it does inside, outside, step, depth plus a few other types.  I am not home so can't tell you the make.\n\nGo check out the international sellers on ebay.\n\nEnjoy
878674
Use the micrometer caliper to measure the diameter of the copper wire. \nThe micrometer caliper is used to measure distances with more precision than a vernier caliper. It has a 0.5 mm pitch screw, this means that you read millimeters and half millimeters along the barrel. Every revolution of the ratchet knob will open the jaws a half millimeter. The sleeve is divided into 50 divisions corresponding to one hundredth of a millimeter (0.01 mm) each. To take a measurement place the object between the anvil and the spindle, grip the ratchet and turn until the object is lightly gripped, do not overtighten. The first part of the measurement is taken from the barrel, each division is 0.5 mm, note that the millimeters and half-millimeters are on opposite sides of the line. Next obtain the reading of the sleeve and add this value to the reading you obtained from the barrel. \n1. Obtain the reading when the surfaces of the anvil and the spindle are in contact. This is the zero reading of the micrometer caliper, it can be either positive or negative. Record the zero reading to 0.0001 cm.
690270
www.fishersci.com\nwww.aldrich.com\nwww.setonresourcecenter.com/MSDSs/comply1.htm\nwww.chemexper.com\n\nthere are too many to list
678566
http://www.sigmaaldrich.com/Area_of_Interest/Analytical__Chromatography/Microbiology/Product_Lines/Culture_Media_Index.html has a listing of different culture media.
409033
a vernier caliper should do the trick.  it can measure the inner and outer diameter
944234
Machinests use various tools to measure accurately to .0001 or 1 ten thousandth of an inch. Typical measuring devices are: scale, micrometer, dial calipers, gage blocks, gage pins, indicators as well as electronic micrometers, dial calipers and CMM (coordinate measuring machine). Typical measurments are 1" or 1.000, 1/4" or .250, 1/64" or .0156. Most measurments are carried to three or four decimal places. So half inch 1/2 in a machinest measurement would be .500.
856843
external--on the outside or visible part\ndomestic---of the home, household, family affairs
23735
There are lots of other hygrometer techniques. \n\n1. Conductivity\n2. IR absorption\n3. electrolytic method\n4. hair hygrometers (hair curls when it is moist, as everyone knows)\n\nAnd so on.
619371
latex gloves\nzip lock bags\nuv light\nDNA analysers
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Check the Omega online catalog. They have an extensive supply of measuring devices for lab, process, and manufacturing uses. Customer service is top notch.\n\nwww.omega.com
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(3) micro-lams 2X14x18
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1) Measureing the height of ants in order to fit them out in a    tuxedo for the beetles wedding\n2) Disprove that individual atoms can be measured by using a micrometer (the best experiments sometimes don't support a theory but disprove it)\n3) Measuring toilet paper thickness to see if soft and thick is better than thin and strong.\n\nSafety when using a micrometer is paramount. Never, ever put your head inside the jaws of a micrometer unless it is less than the width of the jaws.
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You can look here to see them\nhttp://library.stcsc.edu/surgtech/instrument.htm
193064
the micrometer (µm). 1 µm = 10^-6 meter
942750
its a measuring instrument to measure the outer dimensions (inner also)of objects,usually at an accuracy of 0.01mm ,also called micrometer.\nthe main part of instrument is a screw and the pitch of the screw will be .5 mm for a .01mm least count screw gauge. and one rotation of the screw is marked  into 50 divisions.\none drawback of screw gauge is the zero error.\ndue to backlation but which can be easily corrected. there are digital micrometers also in the industry now
222277
Laser Micrometers are used in a variety of industries and employed in a wide range of applications. Industries like Fiber Optics, Cable and Wire manufacturing, Plastic or Metal Tubing manufacturing, SMT component placement equipment or "Pick and Place" machines, Semiconductor, Biotechnology and many other industrial factory automation applications, that require FAST, RELIABLE and ACCURATE measurements of objects at the LEAST possible price.
1057804
try this\n\nhttp://en.wikipedia.org/wiki/Category:Laboratory_equipment