Testo Inc is a world leading designer and manufacturer of high-quality test and measurement instruments backed by over 50 years of engineering experience and success. Testo is also the world's leading manufacturer of portable combustion and air emissions analyzers. Recently Testo has unveiled a high-tech line of HVAC analyzers including the Wireless Smart Probes that are dominating a new sector of the testing market. Testo was founded in 1957 in Germany and continues to provide a high standard of quality through 32 subsidiaries and over 60 agents across the globe. Most Testo measuring instruments offer NIST calibrations, as well as ISO 9001 quality standards.