— VACUUM INSTRUMENTS ■ CORPORATION t Leak Detection Solutions Leak Detection Solutions The MD-490S DG is a Leader among portable tracer gas leak detectors. Everything has been designed to make industrial Leak testing fast, safe and user friendly, while guaranteeing measurement performance and reliability. With a response time Less than 0.5 seconds, sensitivity to 10-8 direct reading atm cc/sec, and the ability to zero-out background, this is the most aggressive portable sniffing helium/hydrogen leak detector in the industry, with advanced features designed specifically for industrial applications. -> GRAPHICAL AND ALPHANUMERIC DISPLAYS - MAXIMUM PERFORMANCE - SIMPLIFIED SET-UP VACUUM INSTRUMENTS CORPORATION Leak Detection Solutions Air Conditioning and Refrigeration Systems, Automotive Components and Appliances, Medical Products, Food Packaging, Aerospace Components...

Measurement Characteristics • Sensitivity: Smallest detectable helium leak rate 5 x 10-8 atm cc/sec • Sensitivity: Smallest detectable hydrogen leak rate 5 x 10-7 atm cc/sec • Measuring Scale: 7 decades • Response Time: less than 0.5 sec • Pressure Measurement: Probe blocked sensor (10-3 Torr) • Turbopump Speed characteristics for high vacuum (10-6 Torr) • Dual Purpose (95% He/5% H2) Internal Calibrated Gas Leak: Ateq model M05, range is 1.5 x 10-5 to 7.5 x 10-5 atm cc/sec helium and 1.5 x 10-6 to 7.5 x 10-6 atm cc/sec hydrogen (150cc DOT rated cylinder, ISO 17025 and NIST traceable) Test Modes...