Dear Sir/Madam, We would like to introduce ourselves as the designers & manufacturers of Microprocessor based Earth Resistivity Meters. In geo-physical prospecting, the geo electrical (Resistivity) method is used effectively for ground water prospecting, geological and geo-technical mapping, bedrock studies, agricultural and certain civil engineering applications, water quality studies and also in mineral prospecting. Aqua meter is the most popular instrument in India for geophysical studies. It is based on the modern technology of microprocessors and employs ingenious methods for extracting subsurface information. What makes our instrument so popular is its simple operation, deep penetration, accurate & reliable results even in adverse field conditions. In addition, a considerable reduction in survey time proves a boon when working under hot sun. The instrument has a facility to measure Self Potential (SP) which is useful in mineral prospecting and environmental studies. Anvic System is a proud to state that some of our instruments are also being used in foreign countries.We have 2 models 占�qua meter CRM 20 & CRM 500. CRM 20 is a low power version (4W) suitable for high Resistivity soil of the Deccan Trap, while CRM 500 is a high power version (40 W) suitable for saline & marshy terrain, which is suitable in Northern India and the coastal regions.We provide complete information of our instrument, its field operation and also give guidelines about interpretation of the data.