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INTRODUCTION ECOPROBE 5 introduces a new level of flexibility, convenience, and quality to in situ detection and analysis of the vapor phase of volatile organic compounds. ECOPROBE 5 comprises two independent analytical systems: 1. Photo-ionization analyzer (PID) measuring total concentration of volatile organic compounds (VOC) 2. Infra-red analyzer (IR) providing separate measurements of methane, petroleum group of hydrocarbons and carbon dioxide. In addition to the above parameters, temperature, pressure and oxygen are also measured. PID + IR Fig.2 - ECOPROBE 5 Principle: soil gas is drawn into the probe and continuously analyzed in the instrument. This ideal combination of analytical systems provides a set of high precision data measured simultaneously in the subsurface environment and designed especially for cost effective soil contaminant surveys and various other environmental tasks. 6