SOUTH ML-401S Laser Plummet

Overview

The SOUTH ML-401S Laser Plummet is a precision optical and laser instrument designed for vertical alignment, construction surveying, and engineering installation. Combining a 25x optical telescope with upward and downward laser beams, it provides a reliable vertical reference for transferring survey points between different elevations.

With a specified vertical measurement standard deviation of 1/45000, the ML-401S is particularly suitable for high-rise construction, structural alignment, and vertical axis control where accurate positioning is essential.

Key Features

Dual Laser Vertical Alignment

The instrument projects upward and downward laser beams to establish a common vertical reference, helping surveyors transfer control points between floors and elevations.

High-Precision Vertical Measurement

A specified one-set vertical measurement standard deviation of 1/45000 supports precision alignment and verticality checks in building and engineering projects.

25x Optical Telescope

The integrated telescope features 25x magnification, a 30 mm effective aperture, and a minimum focusing distance of 0.5 m for precise optical observation.

635 nm Visible Laser

The semiconductor laser operates at a wavelength of 635 nm. Its specified effective range is at least 150 m in daylight and at least 500 m at night under the manufacturer's stated conditions.

Illuminated Plate Level

The plate level has a sensitivity of 20 arcseconds per 2 mm. Its illumination function helps operators level the instrument in low-light working environments.

Sealed Instrument Structure

The sealed design helps protect internal components against dust and moisture during construction site use.

Portable Field Instrument

With an approximate weight of 2.5 kg and a 3 V power supply, the ML-401S is suitable for routine field deployment and engineering alignment tasks.

Technical Specifications

Model: SOUTH ML-401S
Instrument Type: Optical and Laser Plummet
Vertical Measurement Standard Deviation: 1/45000
Plate Level Sensitivity: 20″/2 mm
Telescope Magnification: 25x
Telescope Effective Aperture: 30 mm
Minimum Focusing Distance: 0.5 m
Laser Plummet Minimum Sighting Distance: 0.5 m
Laser Plummet Centering Error: ≤1 mm
Laser Wavelength: 635 nm
Laser Classification: Class II
Effective Laser Range in Daylight: ≥150 m
Effective Laser Range at Night: ≥500 m
Laser Spot Diameter at 40 m: ≤4 mm
Laser Spot Diameter at 100 m: ≤5 mm
Sight Axis to Vertical Axis Coaxial Error: ≤2″
Laser Axis to Sight Axis Coaxial Error: ≤5″
Power Supply: 3 V
Operating Temperature: -25°C to +45°C
Instrument Weight: Approximately 2.5 kg

Applications

High-Rise Building Construction

Transfer vertical control points between floors and support accurate building axis alignment during construction.

Structural Verticality Monitoring

Check the vertical alignment of columns, walls, shafts, and other structural components.

Engineering Equipment Installation

Establish vertical references for machinery installation, steel structures, and industrial equipment positioning.

Construction Survey Control

Support vertical point transfer and alignment verification in civil engineering projects.

Building Deformation Observation

Assist with vertical alignment observations and monitoring workflows where suitable survey procedures are applied.

SOUTH ML-401S from RTKSurvey.com

RTKSurvey.com supplies the SOUTH ML-401S Laser Plummet and a range of professional surveying instruments for international customers. Contact our team for product availability, accessories, and quotation assistance.