IONICON is the world's leading manufacturer of ultra-sensitive real-time trace gas analyzers based on the unique Proton Transfer Reaction – Mass Spectrometry (PTR-MS) and proprietary SRI-MS technology. IONICON also produces industrial process monitoring solutions, modular time-of-flight (TOF) mass spectrometers for research & OEM, and offers analytical services & trace calibration devices. Over 400 leading scientists, institutions and multinational corporations are among our customers.