The ATEX model dip meter is ideal for the measurement of ground water levels. This particular model is also suitable for use in harsh water conditions which would otherwise damage the instrument on the standard model. The probe is made from stainless steel so will not rust, while the tape is made from high tensile steel. The tape also has graduation markings all along it. It is particularly useful for landfill, brownfield analysis and in remediation industries.The entire piece of equipment is easily powered by a standard 9 volt battery but it must specifically be a Duracell MN1604 as specified by the manufacturer. The Operating temperatures for the advanced model are: Reel: -20 to +40 °C, Probe: -20 to +85 °C which should be considered before you purchase.