UNI-T LM-40T Laser Distance Meter 40m Range, ±2mm Accuracy, IP54, Backlit LCD, Area/Volume/Pythagorean, 20 Data Sets

Measuring distances manually with a tape measure is slow, inaccurate, and often requires a second person. The UNI-T LM-40T laser distance meter solves this by delivering precise, one-person measurements up to 40 meters with just the press of a button. Ideal for construction, real estate, interior design, and DIY projects, this compact tool replaces guesswork with reliable digital results.

Who is it for

Contractors, architects, electricians, and homeowners who need fast and accurate room dimensions, area calculations, or indirect height measurements. It is especially useful when working alone or in hard-to-reach spaces where a traditional tape measure is impractical.

Main features

• Measures distances from 0.05 m to 40 m with ±2 mm accuracy
• Multiple functions: single/continuous measurement, area, volume, Pythagorean (2-point and 3-point), addition/subtraction
• Stores up to 20 measurement sets for quick reference
• Backlit LCD display for clear readings in low light
• Selectable reference point: front or rear edge of the device
• IP54 dust and splash proof rating for durability on job sites
• Class 2 laser (630-670 nm, <1 mW) for safe operation
• Auto laser off after 30 seconds and auto power off after 180 seconds to conserve battery
• Powered by 2 x 1.5V AAA batteries (up to 8000 measurements)

Specifications

• Measurement range: 0.05 m – 40 m
• Accuracy: ±2 mm
• Units: meters, feet, inches
• Laser class: Class 2, 630-670 nm, <1 mW
• Functions: single, continuous, area, volume, Pythagorean (2-point, 3-point), add/subtract
• Data storage: 20 sets
• Display: backlit LCD
• Auto laser off: 30 seconds
• Auto power off: 180 seconds
• Battery: 2 x 1.5V AAA
• Battery life: up to 8000 measurements
• Operating temperature: 0°C to 40°C
• Storage temperature: -20°C to 60°C
• IP rating: IP54
• Measurement reference: front/rear edge

Tips

For best accuracy, hold the meter steady against a flat surface or use a tripod for longer distances. When measuring indirectly (Pythagorean), ensure the laser hits the target at a right angle. Clean the lens regularly to maintain precision.