A cost effective method of on site calibration - mixtures containing oxygen, carbon dioxide, and nitrogen available. Applications and benefits: • Calibrate when you want to • Choose oxygen and/or carbon dioxide • Calibrate Gaspace 1 and 2, Portamap 1 and 2, and Gaspace Advance 1, 2, and 3 • UK supply only • Avoids returning the instrument to Systech for a gas calibration • Builds confidence in your results - use as a quick check guide • No need for large, heavy, expensive rental cylinders from major industrial gas companies • Supplied from stock in the UK