1. Length - Measuring tape - SI unit: meter (m)
2. Mass - Balance - SI unit: kilogram (kg)
3. Time - Clock - SI unit: second (s)
4. Temperature - Thermometer - SI unit: Kelvin (K)
5. Electric Current - Ammeter - SI unit: ampere (A)
6. Amount of Substance - Balance - SI unit: mole (mol)
7. Luminous Intensity - Photometer - SI unit: candela (cd)
8. Pressure - Barometer - SI unit: pascal (Pa)
9. Force - Spring scale - SI unit: newton (N)
10. Energy - Energy meter - SI unit: joule (J)
11. Power - Wattmeter - SI unit: watt (W)
12. Electric Charge - Electrometer - SI unit: coulomb (C)
13. Voltage - Voltmeter - SI unit: volt (V)
14. Electric Resistance - Ohmmeter - SI unit: ohm (Ω)
15. Electric Capacitance - Capacitance meter - SI unit: farad (F)
16. Electric Inductance - Inductance meter - SI unit: henry (H)
17. Frequency - Frequency counter - SI unit: hertz (Hz)
18. Velocity - Speedometer - SI unit: meter per second (m/s)
19. Acceleration - Accelerometer - SI unit: meter per second squared (m/s²)
20. Density - Hydrometer - SI unit: kilogram per cubic meter (kg/m³)