Tilt sensors, switches and inclinometers generate an artificial horizon and measure angular tilt with respect to this horizon.

Levels are mechanical or electronic tools that measure the inclination of a surface relative to the earth's surface.

Rules are flat, graduated scales used for length measurement.

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

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.

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