Instruments for measuring

Voltmeter - voltage
Ammeter - Current
Potentiometer - 
Tachometer - Speed (rpm)
Sinerule -
Screw guage - length , thickness
vernier Callipers - length, diameter (internal, external)
Spherometer - radius of curvature
Galvanometer
Optical Encoder
Scales - Tape
Protractor - angle
Set squares
Speedometer - speed
strain guage -
LVDT
Thermometer - Temperature
Manometer - Pressure
Barometer - Pressure
Sextant - Height from a distance
weighing machine - weight
multimeter - resistance, current, voltage etc.
Planimeter - centre of mass of irregular shape
Anemometer - Wind Velocity measurement

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