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MEASURING Tools Timeline Count, Locate, Weigh, View, Time, Temperature

COUNT
BCE
.
TEMPERATURE
CE
.
VIEW
CE
Sumerian Abacus
2500
.
differential pressure
800
.
Magnifying glasses
100
Persian Abacus
600
.
thermometer -air pressure
1000
.
Corrective lenses
1000
.
CE
.
anemometer -swing-plate
1450
.
Optical Microscope
1000
Roman Abacus
100
.
thermometer -Galileo
1593
.
Telescope
1100
Chinese Abacus
1300
.
thermometer -sealed glass
1629
.
Refracting Telescope
1608
Adding Machine
1642
.
barometer -mercury
1643
.
Reflecting Telescope
1616
.
1800
.
thermometer -sealed glass
1654
.
Handheld Eyeglasses
1284
Cash Register
79
.
U-tube
1661
.
Sunglasses
1300
Burroughs Adding Mach.
88
.
anemometer -pressure-plate
1667
.
Earheld Eyeglasses
1727
.
1900
.
thermometer -mercury glass
1714
.
Achromatic Lens
1733
Tauring Machine
36
.
thermometer -0 -100 scale
1744
.
Bifocals
1784
Pocket Digital Calculator
72
.
thermometer -max -min
1782
.
.
1800
.
.
.
.
1800
.
Binoculars
00
.
.
.
thermocouple
21
.
Astigatism Eyeglasses
25
LOCATE
CE
.
barometer -aneroid
43
.
Prism Binoculars
54
Sextant
994
.
anemometer -cup
46
.
Contact Lens
87
Compass
1100
.
Kelvin scale
48
.
.
1900
Astrolabe
1295
.
manometer -bourdon gage
49
.
Roof Prism Binoculars
05
Transit
1840
.
hypsometer
49
.
Electron Microscope
31
.
1900
.
optical pyrometer
92
.
Radio Telescope
37
Echo Sounder
13
.
thermometer -5 min medical
66
.
Soft Contact Lens
60
ASDIC
17
.
McLeod gauge
74
.
.
.
Radio Direction Finding
30
.
temperature -resistance
85
.
.
.
Radar
35
.
optical pyrometer
92
.
.
.
LORAN
40
.
sphygmomanometer
96
.
.
.
Sonar
48
.
.
1900
.
WEIGH
BCE
1 satellite Navigation
60
.
Pirani gauge
06
.
hanging balance
?
GPS
75
.
Langmuir probe
24
.
beam scale
?
.
.
.
thermistor
30
.
.
CE
.
.
.
.
.
.
platform scale
1830
.
.
.
.
.
.
spring scale
1874
MEASURE
BCE
.
.
.
.
triple beam scale
.
Plumb Bob
2500
.
TIME
BCE
.
counting parts scale
.
divider
2500
.
Sundial Monumental
1500
.
.
.
story stick
2500
.
Sundial Portable
600
.
.
.
Caliper
500
.
Water Clock
500
.
.
.
.
CE
.
Armillary Sphere
200
.
.
.
Yard Stick
1608
.
.
CE
.
.
.
Micrometer
1636
.
Water Clock
800
.
.
.
.
1800
.
Astrolabe
900
.
.
.
Transit
40
.
Falling weight Clock
1300
.
.
.
Tape Measure
1868
.
Sundial Compass
1500
.
.
.
.
1900
.
Key wind Clock
1450
.
.
.
Spirit Level
54
.
Pendulum Clock
1657
.
.
.
Feeler Gage
54
.
Electric Clock
1840
.
.
.
Laser level
2000
.
.
.
.
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LOCATE
year
.
TIME
year
.
WEIGH
year
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