ACDs’ innovative methods of producing accurate calibration gas standards on demand, has changed the gas detection service world. In business since 1988, ACD has been providing more economical, eco-friendly and safer alternative calibration gas standards to old fashioned cylinder gas. These instruments provide cal gas as needed and do not require any special handling or shipping methods. The fact that the gas is generated when needed, rather than being stored under high pressure and released when required, eliminates the shelf life problems that exist with current calibration gas cylinders. The technologies utilized in these instruments also affords the user the ability to vary calibration concentrations and flow rates with one unit (try that with a cylinder). These instruments also offer unmatched cost savings by providing up to one hundred times as many calibrations as a cal gas cylinder from one source that costs about as much as two cylinders of gas. If you want the best calibration gas standards on the market, you want ACD products.