The Amprobe MLS55-3 Pipe transmitter is an optional accessory for the AT-3500 underground cable locator that allows for pinpointing places in pipes, ducts, etc. It can be inserted to the pipe/duct using standard fish tape or a duct rodder and can accommodate pipes over 2″ (5 cm) in diameter.
I didn’t purchase this unit i got a PRM-4 Rotation meter
Rotation meter works outstanding ! easy to use and understand
✔ Yes, I recommend this product.