英和和英

a valve detector

a sopranino recorder

a rectifier of prejudices

a kind of radar device called over-the-horizon radar

an instrument for checking short circuits, called a ground detector

a frequency discriminator

dactylic meter

a device called a frequency discriminator

measuring instrument that detects electric charge

a hodometer

a sensitive voltmeter

a survey to measure the height of tides

radar equipment

aneroid barometer

a radar beacon

a laser interferometer

radar used in weather forecasting

a deadbeat controller

an ionosphere measurement device called ionosonde

an aneroid barometer

a galvanometer of extreme sensitivity

a nitrometer

hectometer

a gauge

a tachometer

a voltmeter

geodesy

an altimeter

a saccharometer

a salinometer