PlumbRod™ — Survey Rod & Prism Pole Plumb Vial Calibration System
LAUNCHING AUG 15TH, 2026
Is Your Rod Level Actually Level?
Most survey rods leave the factory with a 40-minute bubble vial — and that vial drifts. Drops, heat cycles, and daily field use knock it out of adjustment without any visible sign. If your rod vial is off, every shot is off — and you may never know it.
The PlumbRod™ gives your shop or office a wall-mounted plumb reference so you can verify and when needed adjust your rod's bubble vial — quickly and easily. True plumb. Every time. Supports both fixed and adjustable 2m rods.
How It Works
The PlumbRod™ mounts to any wall or door jamb and establishes a mathematically true plumb line using the oldest, most reliable reference in existence — a suspended plumb bob. A 2-meter reference arm means even tiny vial errors translate to a clearly visible bubble offset, giving you a calibration that optical and laser-based methods can't match for simplicity and cost.
- Mount the upper bracket to your wall at approximately 7 feet
- Thread your survey rod into the Plumb Post — the system self-plumbs by gravity
- Place your rod tip in the Calibration Disc and adjust your vial to center
No power required. No calibration equipment to calibrate.
Key Features
- Wall-mounted calibration station — set it up once, use it for years
- True plumb reference via suspended plumb bob — no lasers, no batteries, no drift
- 2-meter reference arm amplifies vial error for easy visual detection
- 5/8"-11 UNC threaded Plumb Post — compatible with virtually all survey rods and prism poles
- Full-circumferential V-groove Calibration Disc — repeatable rod tip placement every time
- Spring cord lock for fast, tool-free string height adjustment
- High-strength engineering polymer construction — impact resistant, UV stable, built for shop environments
- Mounts to wood stud with included hardware
- Patent Pending — #64/069,477
What's In The Box
- Upper wall bracket (Bracket #1) with Plumb Post and spring cord lock
- Lower wall bracket (Bracket #2) with Calibration Disc
- Mounting hardware (#10 wood screws and washers)
- Instruction card
Choose the Brass Plumb Bob variant above to include a quality brass plumb bob. If you already have one, the base kit is all you need.
Compatibility
The PlumbRod™ Plumb Post threads onto any standard 5/8"-11 UNC survey rod or prism pole tip — the industry standard thread used by Seco, SitePro, Leica, Topcon, Sokkia, AdirPro, and virtually all other manufacturers. Works with 2-meter fixed-height rods, telescoping prism poles, and GPS rover rods.