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The UNI-T LM100A is a professional-grade, high-precision laser distance meter designed for architects, construction workers, interior designers, and DIY enthusiasts who demand accuracy and efficiency in their measurements. As part of UNI-T's advanced LM series, this instrument delivers reliable distance measurements up to 100 meters with an impressive accuracy of ±2mm, making it an indispensable tool for a wide range of applications.
Engineered for both professional and personal use, the LM100A features a new ergonomic design that ensures comfortable single-handed operation. Its intuitive interface, large 2-inch backlit LCD display, and comprehensive measurement functions allow users to perform everything from simple distance measurements to complex volume calculations with ease. Whether you're planning a renovation, supervising construction, or developing real estate, the LM100A provides the precision and versatility you need.
Long 100m Measurement Range: Measures distances up to 100 meters (330 feet) with millimeter precision, suitable for both indoor and outdoor applications.
High Accuracy (±2mm): Delivers exceptional accuracy of ±(2mm + 5×10⁻⁵D) , ensuring reliable results for professional-grade work.
Large 2" Backlit LCD Display: Features a clear, easy-to-read screen with backlight for excellent visibility in various lighting conditions, from bright sunlight to dim interiors.
99-Group Data Memory: Stores up to 99 measurements for convenient recall and documentation, eliminating the need for manual note-taking on site.
Multiple Measurement Functions: Includes single distance, continuous measurement, area, volume, Min/Max, addition/subtraction, and Pythagorean (indirect) measurement functions.
Built-in Dual-Axis Spirit Level: Features integrated horizontal and vertical bubble levels for accurate alignment and leveling during measurements.
Selectable Reference Plane: Allows measurements from either the front or rear of the device for maximum flexibility in various measuring situations.
Class 2 Laser Safety: Equipped with a safe red laser (630-670nm, <1mW) that provides a clear, visible aiming point.
Auto Power-Off Functions: Conserves battery life with automatic laser shut-off after 30 seconds and device shut-off after 150-180 seconds of inactivity.
Compact & Portable: Lightweight design (approx. 215g) with compact dimensions (122×52×29.5mm) easily fits in pocket or tool bag.
Complete Package: Includes soft carrying case, 2× AAA batteries, and user manual for immediate use.
| Item | Quantity |
|---|---|
| UNI-T LM100A Laser Distance Meter | 1x |
| Soft Carrying Case | 1x |
| AAA Batteries (1.5V LR03) | 2x |
| User Manual | 1x |
Press the power button to activate the device and laser.
Aim the laser dot at the target surface.
Press the measure button to instantly display the distance on the large backlit LCD screen.
Press and hold the measure button to enter continuous measurement mode.
Move the device while the display updates in real-time.
Release the button to lock the final measurement.
Ideal for finding minimum/maximum distances or measuring diagonals.
Select the area or volume function from the mode menu.
Measure the length and width (and height for volume).
The device automatically calculates and displays the total area or volume, saving time and reducing calculation errors.
Use this function to measure heights or distances that are inaccessible (e.g., measuring the height of a building from the ground).
The device uses the Pythagorean theorem to calculate the desired dimension based on two or three measured sides.
Measure a first value, then press the addition or subtraction button.
Measure a second value; the device instantly displays the combined result.
Perfect for calculating total wall lengths or remaining spaces.
In continuous measurement mode, the device simultaneously displays the minimum and maximum values detected.
Useful for ensuring level surfaces or finding the shortest/longest distance in a room.
The LM100A automatically stores measurement results.
Recall up to 99 groups of saved measurements for review or documentation.
Choose between measuring from the front or rear of the device using the reference button.
This feature allows for flexible measurement options in corners, recesses, or when using the device against walls.
Use the integrated horizontal and vertical bubble levels to ensure the device is perfectly level before measuring, increasing accuracy.
The UNI-T LM100A is an ideal all-in-one tool for:
Measuring room dimensions, wall lengths, and ceiling heights
Calculating material quantities for flooring, tiling, and drywall
Verifying structural dimensions and layouts
Planning furniture placement and room layouts
Measuring for custom cabinetry and built-ins
Calculating paint, wallpaper, and flooring requirements
Site surveys and preliminary measurements
Creating accurate floor plans and elevations
Verifying design specifications
Property measurement and space assessment
Real estate development and appraisal
Facility planning and space optimization
Home renovation projects
Furniture assembly and placement
Workshop measurements and layout
Personal projects and hobby work
| Feature | Benefit |
|---|---|
| 100m Range with ±2mm Accuracy | Professional-grade precision for demanding applications—from small rooms to large construction sites . |
| 99-Group Data Memory | Store and recall up to 99 measurements, eliminating manual note-taking and reducing errors . |
| Multiple Calculation Functions | Area, volume, addition/subtraction, and Pythagorean functions save time and mental arithmetic . |
| Large 2" Backlit Display | Crystal-clear readings in any lighting condition—from bright sunlight to dark interiors . |
| Built-in Dual-Axis Spirit Level | Ensure accurate, level measurements without additional tools . |
| Ergonomic Design | Comfortable one-handed operation with intuitive button layout . |
| Complete Accessory Package | Soft case, batteries, and manual included—ready to use out of the box . |
| Trusted UNI-T Quality | Backed by UNI-T's reputation for reliable test and measurement equipment . |
Users consistently praise the UNI-T LM100A for its accuracy, ease of use, and comprehensive feature set. The large backlit display and ergonomic design are frequently highlighted as key advantages over competing models.
Accuracy: Users confirm the device delivers reliable, millimeter-precise measurements for both professional and personal projects.
Ease of Use: The intuitive interface and comfortable grip make it accessible for users of all experience levels.
Build Quality: The device feels solid and durable, with a design that protects the laser and screen.
Value for Money: The combination of 100m range, multiple functions, and memory storage offers exceptional value at its price point.
No Tripod Thread: Some users note the absence of a tripod mount, though this is common in handheld distance meters .
Battery Type: Uses AAA batteries (included) which are readily available worldwide.
Outdoor Use: Like all laser meters, bright sunlight may reduce visibility of the laser dot; a target plate can be helpful for long-distance outdoor measurements .
The UNI-T LM100A is a powerful, versatile, and accurate laser distance meter that delivers professional-grade performance at an accessible price point. Its 100m range, ±2mm accuracy, 99-group memory, and comprehensive calculation functions make it exceptionally well-suited for architects, construction professionals, interior designers, and serious DIY enthusiasts.
One reviewer aptly noted: "The LM100A appears as a well-balanced hand-held device, shaped for ease of use and clear readability... it gives the impression of a tool built for demanding measurement tasks—reliable, straightforward, and designed to make sense from the first time you pick it up" .
Whether you're measuring a small room, calculating material quantities for a renovation, or surveying a large construction site, the LM100A delivers the precision, reliability, and versatility you need. With its large backlit display, intuitive operation, and robust memory, it's a smart investment for anyone who values accurate measurements.
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