Equipment&colon; measuring instrument, calibration, fixturing. Censoring also occurs when a value occurs outside the range of a measuring instrument. Attempts to hold the measuring instrument level would also be made. The city is also known for Fundamental Measuring instrument manufacturing industry. The electroscope was the first electrical measuring instrument. In the past, a common time measuring instrument was the sundial. NIST has developed a surface measuring instrument, called the Molecular Measuring Machine. The radiation dosimeter is an important personal dose measuring instrument. A measuring instrument is a device for measuring a physical quantity. Any real measuring instrument has a limited range over which it can accurately measure absorbance. A tangent galvanometer is an early measuring instrument used for the measurement of electric current. The octant, also called reflecting quadrant, is a measuring instrument used primarily in navigation.