
Model DT300 V1.0 11/09
2
Introduction
Congratulations on your purchase of the Extech Model DT300 Laser Distance Finder.
This meter measures Distance up to 164 ft (50m) and calculates Area and Volume. In
addition, the DT300 includes a laser pointer for accurate targeting. This meter is shipped
fully tested and calibrated and, with proper use, will provide years of reliable service.
Safety Instructions
This meter has been designed for safe use, but must be operated with caution.
WARNING: Do not directly view or direct the laser pointer at an eye. Low power visible
lasers do not normally present a hazard, but may present some potential for hazard if
viewed directly for extended periods of time.
Laser classification (Class 2)
The DT300 produces a visible Class 2 laser beam from
the top of the instrument. Do not stare into the laser
beam or direct the beam toward anyone’s eyes. Eye
protection is normally an automatic response (‘blink
reflex’, for example).
Warning: Do not look directly into the laser beam using
optical aids such as binoculars or telescopes. This can create a hazard.
Permitted Uses
• Measure Distances
• Compute Area and Volume
• Measure Angles
Prohibited Uses
• Exceeding the specified measurement limits
• Compromising or deactivating the safety systems built into the meter
• Removal of hazard or explanatory labels affixed to the meter
• Modifying or converting the instrument
• Using third party accessories
• Operation on scaffolding or ladders without proper safety precautions
• Measuring near machines that are operating or near parts of machine installations
that are unprotected
• Aiming the meter into the sunlight
• Outdoor measurements or measurements on roads, near construction sites, etc.
without adequate safeguards
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