The handline is used to make discharge measurements or to collect water quality or sediment samples where it is inconvenient to use a sounding reel or crane. It can be suspended from boat, bridge, irrigation channel, walkway or other platform. It does not have a counter to measure water depth, and only 15 or 30-pound (7 or 14 kg) sounding weights should be used with it.
The handline consists of a Lee-Au handline reel, 40 feet (12.2 m.) of 0.10-inch (0.25 cm) Ellsworth cable, a pressed sleeve connector, and a 10 foot (3 m), 16-gauge/2-conductor, rubber-covered electrical cord with adapter to complete the electrical circuit from the current meter to the headphone, counter or beeper. Additional electrical cord lengths can be specified as required to a maximum of 65 feet.