The Gilian 5000 is a high-performing personal air sampling pump leading the industry in back-pressure performance, reliability and ease-of-use. The pump offer flow rates up to 5000 cc/min, and thanks to several advanced features, the pump overcome the main causes of sampling errors, saving you time and money. The air flow display holds calibration for 30 days, even with atmospheric changes. The back-pressure capabilities of the Gilian 5000 are the highest in the industry for any personal sampling pump.