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As part of an environmental remediation plan to be applied to areas affected by past activities and accidents,characterization of the site is a mandatory step.This activity will determine the extent of the contamination,contaminants’ distribution,etc.Traditionally,this activity involves the collection of different environmental samples and laboratory analysis of the relevant radio nuclides (and eventually other contaminants like heavy metals).When the results are available they are interpreted and then a decision is made.This process is normally very expensive and time consuming.In recent years many techniques have been made available for in-situ measurement that can provide reliable information on the contamination profile in radiological contaminated land.Such measurements tend to be less expensive,faster and with the aid of GPS/GIS systems decisions can be made on-site in real time.Mobile units may also be useful to states who do have laboratory analysis facilities,but are faced with large,unforeseen characterization challenge,such as following and accident or radiation emergency.To overcome this situation we developed the DACM (Data Acquisition and Control Module) technology.Instruments based on this technology can be modified anytime by the user without special knowledge and the claiming of the manufacturer.The DACM based offers a set of components which can be configured,parameterized and controlled with respect to the requirements on site.Typical components are Radon/Thoron modules (soil gas,water,air,exhalation,contiguous flux measurement in different depths),signal inputs for sensors like Co2,Methane,So2..,control outputs for instance for pumps,magnetic valves for exhalation measurements but also complex functional blocks like spectrometers,GPS receiver,PID regulators etc.A complex sampling schedule can be created within few minutes by a graphical software interface.With a dimension of 235mm x 140mm x 255mm and weight less than 6 kg the full system is very handy.