The H2000 leak detector uses hydrogen as a tracer gas. The device is sensitive to hydrogen and can be used to detect leaks that are smaller than bacteria, according to the company. Using nonhazardous 5 percent hydrogen in a 95 percent nitrogen mixture, the device offers the ability to disclose and localize leaks, as well as the detection of leaks with high sensitivity, independent of temperature. The detector is entirely electronic, requiring no pumps, valves or vacuums.

Sensitor Technologies Inc., 2 Survey Circle, No. 2A, North Billerica, MA 01862; (978) 439-9200; www.sensitor.com.