1. Pressure: Barometer
2. Voltage: Voltmeter
3. Purity Of Milk: Lactometer
4. Temperature: Thermometer
5. Velocity Of Wind: Anemometer
6. Earthquake: Richter Scale
7. Degree Of Humidity: Hygrometer
8. Blood Pressure: Sphygmomanometer
9. Radioactivity: Geiger Counter
10. High Temperature: Pyrometer
11. Rainfall: Rain Guage
12. Earthquake Recording: Seismograph
13. Electric current: Ammeter
14. Altitude: Altimeter
15. Velocity And Direction Of Wind: Anemometer
16. Sensitivity Of Skin: Algeismeter
17.AtmosphericPressure: Barometer
18. Improvement Of Hearing Power: Audiometer
19. Quantity Of Heat: Calorimeter
20. Intensities Of Colours: Colorimeter
21. Longitude Of Vessel Over Sea: Chronometer
22. Detection Of Electric Charge: Electroscope
23. Voltage Difference: Electrometer
24. Depth Of The Ocean: Fathometer
25. Small Electric Current: Galvanometer
26. Relative Density of Liquids: Hydrometer
27. Change In Atmospheric Humidity: Hygroscope2. Voltage: Voltmeter
3. Purity Of Milk: Lactometer
4. Temperature: Thermometer
5. Velocity Of Wind: Anemometer
6. Earthquake: Richter Scale
7. Degree Of Humidity: Hygrometer
8. Blood Pressure: Sphygmomanometer
9. Radioactivity: Geiger Counter
10. High Temperature: Pyrometer
11. Rainfall: Rain Guage
12. Earthquake Recording: Seismograph
13. Electric current: Ammeter
14. Altitude: Altimeter
15. Velocity And Direction Of Wind: Anemometer
16. Sensitivity Of Skin: Algeismeter
17.AtmosphericPressure: Barometer
18. Improvement Of Hearing Power: Audiometer
19. Quantity Of Heat: Calorimeter
20. Intensities Of Colours: Colorimeter
21. Longitude Of Vessel Over Sea: Chronometer
22. Detection Of Electric Charge: Electroscope
23. Voltage Difference: Electrometer
24. Depth Of The Ocean: Fathometer
25. Small Electric Current: Galvanometer
26. Relative Density of Liquids: Hydrometer
28. Detection And Measurement Of Light: Photoelectric Cell
29. Salinity Of Water: Salinometer
30. Spectrum Analysis: Spectroscope
31. Hearing Of Heartbeat And Lung Sound: Stethoscope
32. Maintenance Of A Constant Temperature: Thermostat
33. Amplification Of Current: Transistor
34. Measurement OF Potential Difference Between Two Points: Voltammeter
35. Flow Of Air: Aerometer
36. Radiant Energy: Radiometer
37. Conversion Of Rays Into Mechanical energy: Radiograph
38. Measurement Of Intensity Of Light: Lucimeter