3M™ Electronic Marking System (EMS) Warning Tape 7900-XT Series
Warning tape with integrated radiofrequency (RF) path markers eliminates tracer wire issues while providing reliable detection and early warning during excavation.
The 3M™ EMS Warning Tape 7900-XT Series combines early warning technology with RF path marker technology for underground utility applications to address both excavation safety and utility detection challenges.
The tape features a high-strength core material which provides early warning for excavators that underground assets are present.
Each utility type operates on a unique frequency to prevent interference and support accurate and efficient identification during locate operations.
Eliminates the need for grounding and complex tracer wire installation procedures. Tape lays flat and comes in dispenser boxes for quick, efficient deployment.
Path marking technology helps create an easy-to-follow detectable path above ground for buried utilities. Watch how 3M™ EMS Warning Tape 7900-XT Series compares to traditional tracer wire for utility detection and excavation safety.
Underground utility damages are still common and often preventable. These statistics from the 2024 DIRT Report & Public Dashboard underscore the need for mechanical protection.
Each material is carefully selected for its ability to deliver long-lasting protection and reliable warning for underground utilities.
Open Trench
80 mil (2.03 mm)
+Add 2 cm at RF marker
3,000 lbs. (13kN)
500 ft (152 m)
Excellent resistance to acids.
Good resistance to alkalis.
8 ft (2.4 m)
Supporting documents for the evaluation of 3M™ Pathmarking Tapes. Contact us for additional information or guidance.
Magnetic Resonators for Locating Underground Assets by 3M covers the principles and advantages of RF pathmarkers in underground asset detection.
Proper installation of caution and warning tapes ensure optimal protection for buried utilities. See the installation sheet for step-by-step instructions.
Brochure for the 3M™ Electronic Marking System (EMS) Warning Tape 7900 Series product line created by 3M.
Choose the right configuration for your project. Customizable options are available to match your utility type and identification requirements.
Film color: Red
Path marker frequency: 34.9 kHz
Film color: Orange
Path marker frequency: 48.8 kHz
Film color: Yellow
Path marker frequency: 53.9 kHz
Film color: Green
Path marker frequency: 41.4 kHz
Film color: Blue
Path marker frequency: 73.5 kHz
Film color: Purple
Path marker frequency: 44.9 kHz
4"
Recommended for small-diameter utilities up to four inches wide, such as service laterals, conduit, and residential distribution lines.
6"
Recommended for utilities between four to six inches wide, including mid-size distribution lines and fiber ducts.
12"
Recommended for utilities wider than six inches, including larger mains or multiple parallel runs.
For complete coverage beyond twelve inches wide we recommend installing multiple pieces of tape side-by-side.
Standard Legends
Standard legends are available with commonly used utility-specific warning language. Legends are available for: Electric, Communication, Gas, Water, Waste Water, and Reclaimed Water.
Customizable Legends
The digital printing process accommodates custom warning messages and full color-logos. This option is often selected to include an emergency contact number.
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