Ridgid ST-305R Battery Powered Multi-Frequency Line Transmitter

Description

Why waste excavation hours guessing where buried metal water pipes and electrical lines run through congested easements? The Ridgid ST-305R Multi-Frequency Line Transmitter energizes metallic utility pipes and cables with five distinct trace frequencies. Excavation contractors pinpoint buried utility paths before backhoe buckets strike hidden gas mains or fiber conduit. Wet, highly conductive soil profiles can bleed transmitter current away from target pipes, requiring strategic grounding stake placement.

Transmitter Power Bench Calibration Limits

Bench testing across calibrated inductive loop loads proves the transmitter maintains up to five watts of output power across all five selectable frequency bands. The 1-kHz, 8-kHz, 33-kHz, 93-kHz, and 262-kHz transmitters hold frequency stability within 0.05 percent, preventing receiver drift across deep underground pipe traces. Current drive logic adjusts automatically to line impedance, delivering maximum signal current into low-resistance water mains. Testing on depleted rechargeable batteries confirms the transmitter regulates output signal strength down to eleven volts before shutoff.

High-impact engineered resin forms the watertight outer enclosure, holding IP65 seals against heavy jobsite rainfall and wet clay mud. The electronic power stage accepts versatile power inputs, running on an internal rechargeable lithium-ion battery or six standard C-cell alkaline batteries. The transmitter weighs 2.5 lbs without batteries and measures 4.7 inches by 4.7 inches by 7.1 inches, carrying easily alongside standard utility pipe receivers.

Key Features of Ridgid ST-305R

Underground excavation contractors buy Ridgid ST-305R Multi-Frequency Line Transmitter units to trace metallic gas pipes and trace wires ahead of trenching. Compare commercial line transmitter pricing to upgrade your underground locating truck packages.

• Five field-proven transmitting frequencies match varying soil conductivity and buried metallic pipe types.
• Five-watt power output drives strong locating signals through deeply buried iron pipes and long copper cables.
• Direct connection leads, induction clamp mode, and broadcast induction mode provide versatile coupling options.
• Dual power capability runs off internal rechargeable lithium-ion packs or standard alkaline C-cells.
• Heavy-duty conductive ground stake establishes solid low-resistance earth return paths in gravel.

Trench Locating Negative Selection Filter

The sealed rotary knob turns with positive detents through heavy rubber mud boots and work gloves. Do not purchase this line transmitter to locate non-metallic plastic PVC pipes without trace wire, unshielded sewer vitrified clay lines, or severed cables lacking electrical continuity. Routine maintenance requires scraping dried mud off terminal connection clips, wiping the seal gasket before closing the lid, and charging the internal lithium battery pack after long days of locating.

Factory Warranty Hardware Inclusions

Ridgid backs this multi-frequency transmitter with a Lifetime limited warranty against defective manufacturing and material flaws. The standard factory package contains one ST-305R transmitter, heavy-duty direct connect leads with clips, steel ground stake, six C-cell batteries, and an illustrated technical operator manual.