Electronic Transmitters are electronic devices that are used to produce radio waves with the aid of antennas. They generate radio frequency currents that emit radio waves. These transmitters are designed to provide economical ways to test relative humidity. With compact and portable design, they can be easily mounted on wall or duct. These factory calibrated devices are sure to provide high sensitivity, prompt response, and high stability. Their linearized current or voltage ensure interfacing with a range of display and control devices such as meters, controllers, etc.