Measuring instrument

Conductivity, temperature, depth compass geological compass ruler spectrum analyzer dot planimeter debt clock mercury barometer astrolabe quadrant Forbes Log deposit gauge diffusion tube dynamometer goniometer tilt detector taximeter sound level meter barograph densitometer nephelometer blower door micrometer Level indicator galvanoscope sight glass instrument transformer Epstein frame electrostatic voltmeter mass spectrometer material measure frequency counter nilometer spirometer Split-Hopkinson pressure bar sounding lead audiometer rheometer coordinate-measuring machine tachograph Schmidt hammer pulse recorder level staff Logic analyzer level sensor Thread pitch gauge time to amplitude converter Maxwell bridge heliometer body fat analyzer