Katharometer – Device for measuring thermal conductivity
Magnetometer – Comparing strengths of magnetic fields.
Thermometer, thermocouple – Measuring temperature
Thermostat – Device for maintaining constant temperature
Vernier – Device for measuring subdivisions of a scale
Anemometer – Instrument for measuring the speed of wind
Calliper – Instrument for measuring distances
Electrodynamometer – Instrument for measuring current, voltage or power in both AC & DC circuits.
Photometer – Device for comparing intensity of sources of light
Rectifier – Device for comparing AC & DC
Solar cell – Cell that converts solar energy into electrical energy
Voltmeter – Instrument for measuring voltage o potential difference between two points.
Wavemeter – Instrument for measuring the wave length of a radiowave
Galvanometer – Instrument for measuring or detecting small current.
(Ballistic galvanometer, tangent galvanometer)
Ammeter – Meter used to measure electric current
hydrometer – Instrument used for measuring the density or relative density of liquids.
Lactometer – Measure the density of milk.
Barometer – Measure the atmospheric pressure
Barograph – Used to record the accurate atmospheric pressure.
(fortin’s barometer, aneroid barometer)
Hydraulic intensifier – Used to increase the intensity of pressure of water by means of hydraulic energy
available from a large amount of water at a low pressure.
Accumulator – Device used to store the energy.