Leak detector Sensistor Technologies offer the H2000 which uses hydrogen as a tracer gas to detect leaks. It is a compact, portable, and robust system that is extremely sensitive to hydrogen gas. It can be used for testing fuel tanks, costly equipment, and hydraulic systems. Using a safe, nonhazardous 5 percent hydrogen in 95 percent nitrogen mixture, it offers flexible detection solutions including the ability to disclose and localize leaks, as well as the detect leaks with high sensitivity, independent of temperature. For more information, call (978) 439-9200 or visit www.sensistorusa.com.