Angle measurement: protractor, dividing head, theodolite, sextant, knife edge ruler;
Meteorological measurement: thermometer, barometer, wind vane, rain gauge, computer and satellite.
More conventional: projector, hardness tester, grid knife, etc.
Measuring tool: it is a tool to measure a certain property. Include length, temperature, time, mass, force, current, voltage, resistance, sound, radio, refractive index and average dispersion.
Weight measurement: balance scale, floor scale, spring scale, etc.
Temperature measurement: thermometer, thermometer, etc.
Pressure measurement: pressure gauge, pressure transmitter, etc.
Flow measurement: flowmeter, differential pressure detector, etc.
Liquid level measurement: differential pressure gauge, liquid level gauge, etc.
Electric energy measurement: voltmeter, ammeter, field strength meter, frequency meter, etc.
Composition determination: analyzer, chromatograph, etc.
Acid-base measurement: acidity meter, alkalinity meter, etc.