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ALLOSUN Gas Leak Detector Ultrasonic Leak Tester Gas Sniffer Transmitter with Headphone, White (EM282) auspowers_batchone Socket cap bolts that haveALLOSUN Gas Leak Detector Ultrasonic Leak Tester Gas Sniffer Transmitter with Headphone, White (EM282) Read more EM282 This equipment is designed to locate leaks in pressure and vacuum systems. In Active mode, Both EM282 R and EM282 T were fully functioned. In passive mode, only EM282 R is used. Passive mode can be to detect and locate leaks in pressure and vacuum systems. These leaks can generate ultrasonic emission which can be detected by EM282 R