Radiodetection 4" (100 mm) Locator Clamp The Radiodetection 4" Locator Clamp is a signal sensing accessory designed to help utility locating professionals identify individual cables and pipes in crowded utility corridors. It works with compatible locators to isolate and detect signals from specific underground utilities for improved tracing accuracy. Key Features • 4" (100 mm) clamp diameter for medium-size utility lines • Helps isolate and identify target utilities in congested areas • Detects signals from individual cables and pipes • Compatible with Radiodetection locator equipment