Home > Surveying Equipment > Magnetic Locators
Reliable Detection of Buried Ferrous Objects
Magnetic locators are essential tools for surveyors, utility contractors, municipalities, and construction professionals who need to locate buried ferrous objects quickly and accurately. Common applications include finding survey monuments, property pins, valve boxes, manhole covers, rebar, and other iron or steel targets that may be hidden below the surface.
At Bench Mark, we offer professional magnetic locators from trusted manufacturers including SubSurface Instruments and Schonstedt. Designed for demanding field conditions, these instruments provide dependable detection performance, simple operation, and long-term durability. Whether locating property corners, utility infrastructure, or construction control points, magnetic locators help improve efficiency while reducing time spent searching for buried targets.
Detection depth depends on the size, shape, orientation, and composition of the target. Larger ferrous objects such as valve boxes and iron pipes can typically be detected at greater depths than smaller survey monuments or property markers.
Target size, burial depth, object orientation, soil conditions, and nearby metal structures can all influence locator performance. Understanding these factors helps operators interpret signals more effectively and improve target recovery in the field.
The ideal magnetic locator depends on the types of targets being located, expected detection depths, environmental conditions, and user preferences. Surveyors locating property monuments may have different requirements than utility crews searching for valve boxes, manholes, or buried iron infrastructure.
Yes. Vehicles, fences, reinforced concrete, utility infrastructure, and other large ferrous objects can influence magnetic field readings. Awareness of surrounding conditions helps improve target identification and locating efficiency.
Waterproof models are often preferred by professionals who regularly work in wet environments, heavy vegetation, utility corridors, or adverse weather conditions. Additional environmental protection can improve reliability and reduce downtime in demanding field applications.
Professional magnetic locators are designed for years of field use when properly maintained. Models from manufacturers such as SubSurface Instruments and Schonstedt are built for demanding environments and are backed by long manufacturer warranties to support long-term reliability.
Yes, but a magnetic locator is usually the better professional tool when the property pin is made from iron or steel. Magnetic locators are designed to detect ferrous survey markers, monuments, and buried iron objects.
For surveyors and contractors, the best tool is usually a professional magnetic locator because it is designed to detect buried ferrous property pins and survey monuments.
Proven tools for surveying and utility locating
The SubSurface ML-3S and Schonstedt GA-52CX remain two of the most widely used magnetic locators in the surveying industry. Both models are trusted for their durability, ease of use, and ability to locate buried ferrous objects accurately in challenging field conditions.
The ML-3S features waterproof construction, lightweight design, extended battery life, and advanced signal processing capabilities, making it a popular choice for surveying professionals. The Schonstedt GA-52CX continues to be a proven industry standard, valued for its simplicity, rugged construction, and reliable performance across a wide range of locating applications.
Equipment and guidance from experienced professionals
Choosing the right magnetic locator depends on the type of targets being located, expected detection depths, and field conditions. Bench Mark supplies professional locating equipment supported by knowledgeable staff who understand the practical requirements of surveying, construction, and utility locating applications.
In addition to competitive pricing and trusted products, we provide ongoing technical support to help customers select, operate, and maintain their equipment. Whether purchasing a first magnetic locator or expanding an existing fleet, our team is available to help identify the right solution for the job.
