The 512 hz sonde locator transmits a 512 Hz signal that can be picked up with any compatible locator, allowing users to pinpoint the transmitter's position underground. The flashing LED indicates that sonde is transmitting. The maximum detection range of transmitter for underground pipe location is 25 feet in the air and 15 feet in cast iron (varies with ambient noise and interference). 512HZ Strong Signal This sonde makes your pipeline detection quick and easy. Furthermore, it is capable of working with any 512hz receiver. During operation, the LED will stay steadily lit. If it starts flashing, it indicates a low battery level. 2 Replaceable Connectors These two adapters can attach the sonde locator to drum machine or sectional cables separately. So they provide versatility in locating underground pipe and line detection. Integrated Seamless Design The drain locator adopts seamless injection molding process to achieve better shock resistance. Even if accidentally falling from a height, it will not be easily damaged. Waterproof Material The sewer locator can effectively avoid oxidation, rust, and corrosion to prolong its service life through the abrasionproof coating. Besides, this waterproof 512 Hz locator can work at optimal temperature 4F 130F20C54C. Wide Application The water line locator can be attached to a drain cleaning cable or a water jet hose to locate the remote transmitter in a line. So it can be installed at the end of a fiberglass push cable, duct rod, or sewer cable.