Description The RIDGID SeekTech SR-20 Line Locator (Model 21893) traces buried gas, water, sewer, electrical, and telecom lines with multi-frequency support from 10 Hz to 35 kHz. Some technicians search for it as the rigid sr20. Target line and guidance arrows show the live signal path in real time, so a technician can correct position before a locate goes wrong instead of after. How the SR-20 Tracks a Signal The SR-20 uses an omnidirectional antenna system that captures the full signal field rather than a single strength reading. It calculates orientation, strength, depth, and degree of distortion continuously, and shows depth changes in real time as the operator moves along the line. In a congested utility corridor with multiple lines running close together, that live feedback is what keeps a locate accurate instead of guessing based on signal strength alone. Frequency Range and Transmitter Compatibility The SR-20 traces any frequency from 10 Hz to 35 kHz, covering both active and passive locates. It pairs with RIDGID SeekTech transmitters, including the ST-305 and ST-510, for active tracing on lines that need an induced signal. In passive mode, Omni-Seek technology continuously scans passive power and radio bands to find and avoid unknown metallic lines without needing a transmitter at all. Also Locates Sondes and Camera Heads Beyond utility lines, the SR-20 locates sondes and beacons, including the transmitter built into a SeeSnake inspection camera head. That means the same locator that traces a gas line before excavation can also pinpoint exactly where a camera head sits inside a pipe during an inspection, one tool covering two different jobs on the same truck. Built for Field Conditions, Not Just the Spec Sheet Proximity and signal strength indicators give both visual and audio feedback, so a technician working in bright sunlight or a noisy jobsite still gets a clear read. At 3.9 lbs and powered by four C-cell batteries, the SR-20 is light enough to carry all day without becoming a burden on longer locates. It meets FCC Class A and EN 55022 Class A requirements for electromagnetic compatibility. What Comes With the SR-20 The SR-20 ships with a rugged carrying case built for daily transport in a service vehicle, the batteries needed to run it out of the box, and an operator’s manual covering setup and calibration. Having the case included matters for a tool this precise, dropping or knocking the antenna system out of alignment during transport is the kind of damage that’s easy to avoid and hard to diagnose after the fact. Where the SR-20 Gets Used Underground utility locating for gas, water, sewer, and electrical lines Telecommunications locating, including fiber optic conduit mapping Construction and excavation planning, where accurate mapping prevents utility damage and the repair costs that come with it Municipal maintenance crews tracing lines before scheduled repairs Field technicians working in high interference zones or crowded utility corridors Frequently Asked Questions What frequency range does the RIDGID SeekTech SR-20 Line Locator support? 10 Hz to 35 kHz, covering both active and passive locating. Is the SR-20 compatible with SeekTech transmitters? Yes. It works with RIDGID SeekTech transmitters including the ST-305 and ST-510. Can the SR-20 identify signal distortion? Yes. Guidance arrows and real-time interference monitoring flag distorted or misleading signals as they occur. Does the SR-20 work without a transmitter? Yes. In passive mode, Omni-Seek technology reads existing signals on live utilities directly, no transmitter required. Can the SR-20 locate a SeeSnake camera head? Yes. It locates sondes and beacons, including the transmitter in a SeeSnake camera head, so the same tool works for both utility locating and inspection camera tracking. What comes included with the SR-20? A rugged carrying case, batteries, and an operator’s manual. Is the rigid sr20 the same as the RIDGID SeekTech SR-20? Yes. RIDGID is the brand name, and rigid sr20 is a common way the search gets typed. Both refer to Model 21893. Before any dig, call 811 to have utility lines marked, a line locator like the SR-20 confirms and refines that marking, it doesn’t replace it. Browse RIDGID Diagnostics, Inspection and Locating for the full lineup of compatible transmitters and inspection equipment. Order from J.M. McKinney Co. for genuine RIDGID equipment, in-stock availability, and fast shipping.
