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The Gasurveyor 500 Series is the most flexible range of gas detectors available from GMI. By simple selection of hardware and software options, the instrument can be readily configured to suit any department, including Construction, Leak Survey and Customer Service. Available ranges can be selected including PPM through LEL and Volume Gas, Oxygen, CO, and H2S to ensure that your exact requirements are met. All of the Gasurveyor 500 Series are dual mode instruments, making them suitable for both surveying work and confined space.