• Trusted by technicians for over 25 years
• Industry-leading, universal troubleshooting and maintenance tool for electronically controlled sprinkler irrigation systems
• High power transmitter offers extended long range and allows use on higher resistance wire paths
• Adjustable transmit power allows you to select the best signal for maximum performance
• Receiver provides adjustable loudspeaker audio, headset audio, and visual indications of signal strength

If you’re looking for the best underground wire locator, look no further!

Trusted by technicians for over 25 years and requested by name, the industry-leading 521A Wire and Valve Locator is a universal troubleshooting and maintenance tool for electronically controlled sprinkler irrigation systems. You no longer have to search blindly for buried utilities. Use the 521A locator to confidently locate buried wires and underground valves with speed. Use the 521A to precisely follow the path of a buried wire and measure the wire depth. The ergonomic, easy-to-use receiver can accurately locate underground wire breaks, large nicks, and solenoid valves. The high-power, adjustable transmitter features audio and visual indications of signal strength and offers an extended range that allows the user to select the best signal for maximum performance.

With the probe pointed toward the ground, walk completely around the transmitter location. An absence of tone or null will be detected directly over the path of the wire. Movement to either side will cause the volume of tone signal intensity to increase. Follow the null to determine the wire path.

When attempting to find breaks and nicks, you should decrease the sensitivity of the receiver when pointing it off to either side of the null. You will be able to notice the change in signal intensity immediately. Do not allow the meter to peg or go above 10. This will greatly help in the fault-locating process.

Note: The wire must have a path to the ground to be successfully located. These paths exist in a great majority of all direct buried wires due to insulation imperfections, nicks, and bad splices. If not, create one by grounding the remote end.