Infra control systems provides a full range of humidity temperature indicators, controllers and transmitters. These transmitters are used for accurate measurement and control of humidity. High accuracy and maintenance-free long life are special features ensured by an innovative contamination free sensors. These humidity transmitters find their applications in: hvac, environment chambers, product drying, pharmaceutical, photographic and paper, textile industries, chemical plants, food-tobacco processing, fertiliser, sugar industries, floriculture, green houses, storage rooms, museums and control rooms of process plants. Following are some of the technical features of these humidity transmitters: these humidity transmitters are supplied with nist traceability certificate with accuracy of 2% and 3% rh, accept 24v dc and provide 4ma to 20ma or ov to 5v output, which can be utilised for system integration. These humidity transmitters have the following features such as; increased accuracy using temperature compensation, fast response, long life and high accuracy, etc. Option for space mount or duct mounts is available on request.