SECO 6405-12-FOR 25 mm Nodal Point Stakeout Prism - Flo Orange

Overview

The SECO 6405-12-FOR Nodal Point Stakeout Mini Prism is a compact 25 mm prism assembly designed for construction stakeout, layout, control work, and other precision total station applications.

Its built-in sight cones improve vertical-angle pointing and also function as the locking knobs for the tilting axis. An adjustable 40-minute vial is mounted on the front of the assembly, keeping it visible and accessible during setup and calibration.

The prism features a specified 17.5 mm nodal offset, a high-visibility Flo Orange finish, and an included carrying case for protection during transportation and storage.

Key Features

• Nodal point stakeout mini prism
• SECO part number: 6405-12-FOR
• Compact 25 mm prism
• Specified 17.5 mm nodal offset
• Built-in sight cones improve vertical-angle pointing
• Sight cones double as tilting-axis locking knobs
• Adjustable tilting prism assembly
• Front-mounted 40-minute vial
• Vial is easy to view during setup
• Vial can be adjusted for routine calibration
• High-visibility Flo Orange finish
• Includes protective carrying case
• Designed for stakeout and precision total station measurements
• Available through authorized SECO dealers

25 mm Mini Prism

The SECO 6405-12-FOR uses a compact 25 mm prism suited for stakeout, layout, monitoring, and other measurements where a smaller target assembly is preferred.

Its compact design makes it easier to position close to structures, corners, foundations, utilities, and other restricted measurement locations.

17.5 mm Nodal Offset

The prism assembly has a specified nodal offset of:

• 17.5 mm

The correct prism setting must be entered into the total station or field software before measurements are collected. Instrument manufacturers may display or apply prism constants differently, so the required equipment setting should be verified for the specific total station being used.

Sight Cones for Vertical-Angle Pointing

The prism includes sight cones designed to improve vertical-angle pointing.

These cones provide a clear reference when aiming the total station at the prism assembly, helping the operator identify the tilting axis and establish more consistent pointing.

Dual-Purpose Tilting-Axis Locks

The sight cones also function as the locking knobs for the prism’s tilting axis.

The operator can loosen the knobs to tilt the prism toward the instrument and then tighten them to secure the selected angle. This integrated design reduces the need for separate adjustment hardware.

Front-Mounted 40-Minute Vial

An adjustable 40-minute vial is mounted on the front side of the prism assembly.

The forward-facing location keeps the bubble easy to see while the prism is being positioned over a survey point. Maintaining a plumb setup helps place the prism center directly above the intended stake, nail, monument, or control point.

Adjustable Vial

The vial can be adjusted as part of routine prism maintenance.

Periodic inspection and calibration help ensure the bubble accurately indicates when the assembly is vertical. Vial adjustments should be performed using the appropriate calibration procedure and tools.

Flo Orange Finish

The Flo Orange finish increases visibility across active construction sites and survey projects.

The bright color makes the prism assembly easier to identify from the instrument position and helps distinguish it among other field equipment during transportation and storage.

Included Carrying Case

A protective carrying case is included with the SECO 6405-12-FOR.

The case helps protect the prism, vial, tilting mechanism, and sight cones from dirt, abrasion, and accidental damage between field setups.

Ideal Applications

• Construction stakeout
• Building and structural layout
• Control-point measurements
• Boundary surveying
• Topographic surveying
• Utility layout
• Road and site construction
• Monitoring surveys
• Close-range total station work
• Engineering fieldwork

Technical Specifications

What’s Included

• 1 × SECO Nodal Point Stakeout Mini 25 mm Prism Assembly
• SECO p/n: 6405-12-FOR
• 1 × Adjustable 40-minute vial
• 1 × Protective carrying case

Prism pole, tripod, adapter, total station, and other surveying accessories are sold separately.

Compact Stakeout Prism with Improved Pointing

The SECO 6405-12-FOR combines a compact 25 mm prism, 17.5 mm nodal offset, adjustable tilting axis, sight-cone lock knobs, and a front-mounted 40-minute vial. Its Flo Orange finish and included carrying case make it a practical prism assembly for professional stakeout and layout work.