Protractors and angle gages measure the angle between two surfaces of a part or assembly

Form gages and form gaging systems are used to inspect parameters such as roundness, angularity, squareness, straightness, flatness, runout, taper and concentricity. 

Digital thermometers are portable temperature sensing devices that have permanent probes and a digital display

Temperature instruments use contact or noncontact methods to measure temperature. Products include dial, digital, industrial and laboratory thermometers; temperature probes, indicators, and sensors; RTD elements and transmitters; and thermistors, thermocouples, thermopiles, and thermal switches. 

Digital video recorders record and store video camera output in digital form on disk

Digital LED displays are segmented or dot matrix displays allowing for numeric only and alphanumeric character representation

Digital pressure gauges use electronic components to convert applied pressure into usable signals. The gauge readout has a digital numerical display

Digital panel meters measure and display processes and electrical variables via an alphanumeric digital readout

Digital multimeters (or multi-meters) are used to measure electrical quantities such as voltage, current, resistance, frequency, temperature, capacitance, and time period measurements

Digital ammeters are instruments that measure current flow in amperes and display current levels on a digital display. These devices provide information about current draw and current continuity in order to help users troubleshoot erratic loads and trends

Digital filters use digital signal processing (DSP) to perform numerical calculations on sampled values of a signal

Digital audio systems electronically record and store audio signals such as voice, music, alarm, and security messaging for broadcast, editing, monitoring, and playback

Digital voltmeters are instruments that measure voltage or voltage drop in a circuit. They use solid-state components and display values digitally

Digital-to-analog converter (DAC) chips convert digital signals that represent binary numbers into proportional analog voltages

Digital readouts are specialized displays for position and dimension readings from inspection gages and linear scales, or rotary encoders on machine tools.