measuring device
measuring instrument
measuring system
hypsometer
absolute altimeter
altimetric
altimetry
Scopes
airspeed
ammeter
anemometer
barograph
barometer
blood-oxygen
boiling point
chronometer
condensers
countermortar/counterbattery
galvanometer
gauge
interferometer
interferometry
life-sign
rangefinder
seismograph
sextant
speedometer
spotter
tachometer
tone-arm
estimator
perimeter
polarimeter