Devices

The device - the device, device set, or set of objects or tools for the production of any work.

In other words, the instrument is a set of components designed for specific purposes. Also characteristic of the conversion devices and power characteristics.
example, a thermometer converts thermal energy into mechanical or electrical energy, by means of which enables to estimate the temperature of the test body.
devices have have a very wide field of application, at this site in the section represented Products instruments for measuring quantities - instrumentation, fault location, or communications - search appliances or equipment, safety equipment and testing devices and installations elements - testing instruments, as well as extend the capabilities of devices or other devices to perform service functions - accessories and supplies.