An analyzer is an instrument used to conduct quantitative or qualitative analysis of substance samples to determine their composition, structure, or properties.

A dew - point meter is an instrument used to measure the water vapor content in a gas. It indirectly determines the water vapor content in the gas by measuring the dew - point temperature.

A transmitter, in the field of industrial automation, is a device used to convert non - electrical physical quantities (such as temperature, pressure, humidity, flow rate, dew point, etc.) into standard industrial electrical signals. Its core function is to amplify, condition, convert, and transmit the signals from on - site sensors over long distances. It is a key bridge connecting on - site detection instruments and control systems.