Pig detectors are essential tools used at launchers and receivers to notify operators when a pig has exited or entered the trap. These detectors are available in two types: intrusive and non-intrusive. Intrusive pig detectors work mechanically, activating when a pig makes contact with a lever or piston inside the pipe. This contact triggers a visual or electrical signal. Non-intrusive pig detectors require the pig to be equipped with a magnet. As the pig passes, its magnetic field activates the detector, which then sends a visual or electrical signal. At Drinkwater, we offer a wide range of pig detectors and the expertise to help you choose the right pig detector for your needs.