1. Ammeter – Measures electric current
2. Voltmeter – Measures voltage (potential difference)
3. Ohmmeter – Measures electrical resistance
4. Barometer – Measures atmospheric pressure
5. Thermometer – Measures temperature
6. Hygrometer – Measures humidity in air
7. Anemometer – Measures wind speed
8. Seismograph – Measures earthquakes (seismic waves)
9. Manometer – Measures pressure of gases and liquids
10. Galvanometer – Measures small electric current
11. Altimeter – Measures altitude (height above sea level)
12. Lactometer – Measures purity of milk
13. Hydrometer – Measures density or specific gravity of liquids
14. Speedometer – Measures speed of a vehicle
15. Tachometer – Measures rotation speed (RPM)
16. Colorimeter – Measures concentration of a substance in a solution
17. Photometer– Measures light intensity
18. Spectrometer – Measures properties of light/spectra
19. Electrometer – Measures electric charge or potential
20. Pyrometer – Measures high temperatures, especially in furnaces
21. Radiometer – Measures radiation energy
22. Sonometer – Measures sound-related vibrations
23. Dynamometer – Measures force, torque, or power
24. Multimeter – Measures voltage, current, and resistance (combo of ammeter, voltmeter, ohmmeter)
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